# V0.7 additional sound sources The 22 inherited entries and their licence notes remain in ASSETS.md. The additions below include 25 individual CC0 recordings and six original procedural effects. Source-page evidence and original-preview hashes are in the review provenance manifest. ## Low tension pulse Creator: Stark Drama prototype / original procedural synthesis. Original title: Low tension pulse. Source: review-output/sound-studio-v07/generate-abstracts.py Licence: Original procedural audio; supplied for local inclusion, redistribution and commercial use Checked: 2026-10-29. Local file: `assets/original/tension-pulse.wav`. SHA-256: `ac6e999c8aa0ce3dbbac1b83ec66be6731e9a07682270ff91d918fb9adda6af3`. Preparation: Original filtered noise, sinusoidal components and envelopes; peak scaled to 0.72; 30 ms onset and 100 ms ending taper; PCM16 mono 44.1 kHz. Redistribution: No sampled recording, voice or third-party music. Original synthesis code and rendered files included. ## Dramatic impact Creator: Stark Drama prototype / original procedural synthesis. Original title: Dramatic impact. Source: review-output/sound-studio-v07/generate-abstracts.py Licence: Original procedural audio; supplied for local inclusion, redistribution and commercial use Checked: 2026-10-29. Local file: `assets/original/dramatic-impact.wav`. SHA-256: `61aefd0d8b5aae5fb0b5b7eb96081f9ee77388741e01dd555510610cbf0aad90`. Preparation: Original filtered noise, sinusoidal components and envelopes; peak scaled to 0.72; 30 ms onset and 100 ms ending taper; PCM16 mono 44.1 kHz. Redistribution: No sampled recording, voice or third-party music. Original synthesis code and rendered files included. ## Rising suspense texture Creator: Stark Drama prototype / original procedural synthesis. Original title: Rising suspense texture. Source: review-output/sound-studio-v07/generate-abstracts.py Licence: Original procedural audio; supplied for local inclusion, redistribution and commercial use Checked: 2026-10-29. Local file: `assets/original/suspense-rise.wav`. SHA-256: `e7fad76977a9fe9615588c06b4e2c337ded1028f7570866e30aec643b2be64ed`. Preparation: Original filtered noise, sinusoidal components and envelopes; peak scaled to 0.72; 30 ms onset and 100 ms ending taper; PCM16 mono 44.1 kHz. Redistribution: No sampled recording, voice or third-party music. Original synthesis code and rendered files included. ## Soft atmospheric swell Creator: Stark Drama prototype / original procedural synthesis. Original title: Soft atmospheric swell. Source: review-output/sound-studio-v07/generate-abstracts.py Licence: Original procedural audio; supplied for local inclusion, redistribution and commercial use Checked: 2026-10-29. Local file: `assets/original/atmospheric-swell.wav`. SHA-256: `6c790d31155a43802e2831c1f8651243f5347edbf67459b6c7cd6956f094d256`. Preparation: Original filtered noise, sinusoidal components and envelopes; peak scaled to 0.72; 30 ms onset and 100 ms ending taper; PCM16 mono 44.1 kHz. Redistribution: No sampled recording, voice or third-party music. Original synthesis code and rendered files included. ## Unsettling metallic texture Creator: Stark Drama prototype / original procedural synthesis. Original title: Unsettling metallic texture. Source: review-output/sound-studio-v07/generate-abstracts.py Licence: Original procedural audio; supplied for local inclusion, redistribution and commercial use Checked: 2026-10-29. Local file: `assets/original/metallic-texture.wav`. SHA-256: `f16525d3e366e73032a059155600654cbcf2a666e4294a9bd10bdbd4d4bb2c87`. Preparation: Original filtered noise, sinusoidal components and envelopes; peak scaled to 0.72; 30 ms onset and 100 ms ending taper; PCM16 mono 44.1 kHz. Redistribution: No sampled recording, voice or third-party music. Original synthesis code and rendered files included. ## Transition whoosh Creator: Stark Drama prototype / original procedural synthesis. Original title: Transition whoosh. Source: review-output/sound-studio-v07/generate-abstracts.py Licence: Original procedural audio; supplied for local inclusion, redistribution and commercial use Checked: 2026-10-29. Local file: `assets/original/transition-whoosh.wav`. SHA-256: `499d2a54aa48d4087d7274de92bd404b0faddcf056e932f0ea98fba012ff9340`. Preparation: Original filtered noise, sinusoidal components and envelopes; peak scaled to 0.72; 30 ms onset and 100 ms ending taper; PCM16 mono 44.1 kHz. Redistribution: No sampled recording, voice or third-party music. Original synthesis code and rendered files included. ## Office telephone Creator: BennettFilmTeacher. Original title: Old Phone Ringing. Source: https://freesound.org/people/BennettFilmTeacher/sounds/610191/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/office-phone.mp3`. SHA-256: `18ba20465fb9e5efb2437dcdbd44e40a7c2223ee02e654dc52d4a14780b52a30`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Printer working Creator: haus.the.child. Original title: Printer Printing. Source: https://freesound.org/people/haus.the.child/sounds/839347/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/office-printer.mp3`. SHA-256: `86600e82bd020214f2ef2c7d5d00e362a7b9d4c5ef9e562836deca4728947864`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Paper rustling Creator: Spaghetto87. Original title: paper_rustling_03. Source: https://freesound.org/people/Spaghetto87/sounds/731484/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/office-paper.mp3`. SHA-256: `cc1f6eb4d48a2b4c3732667188131aff6a3ee6427f300255bca09c028fd5eab4`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Keyboard typing Creator: Vsessa. Original title: keyboard typing. Source: https://freesound.org/people/Vsessa/sounds/867687/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/office-typing.mp3`. SHA-256: `891d1d66e0225bf8215197c091e479eb4f4b22c57f8437f8139183d89461ce22`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Electronic school bell Creator: mpaol2023. Original title: Electronic School Bell. Source: https://freesound.org/people/mpaol2023/sounds/370181/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/school-bell.mp3`. SHA-256: `e2ef89f6af85787dacdf8d0f195c64c9504feadaa6c494af9499c9ebb15f1873`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Chair sliding Creator: ME_Studios_Official. Original title: Chair Scrape mp3. Source: https://freesound.org/people/ME_Studios_Official/sounds/656682/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/school-chair.mp3`. SHA-256: `f98c1b7aef4634352e7893ea97b13281bfb14980921d996be1441d2d77384cf8`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Basketball in a gym Creator: DigPro120. Original title: Bouncing Basketball. Source: https://freesound.org/people/DigPro120/sounds/859910/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/school-basketball.mp3`. SHA-256: `eba482e4eef13cf994590890f81f869c018eaa4da87b92531ad6ce10a163c263`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Uniform peak attenuation -0.384 dB; no compressor or automatic levelling. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Corridor footsteps Creator: RaggedyAngst. Original title: Footsteps one person CLEAN.wav. Source: https://freesound.org/people/RaggedyAngst/sounds/546270/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/school-corridor.mp3`. SHA-256: `fd72bf6d678e8101a78deebb51aef615152b3c19f0c6863e777f7b392bcc52a9`. Preparation: Prepared excerpt 0.0–30.42 seconds of the source preview; no complete-recording claim. 5 ms entry and 150.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Passing road traffic Creator: gecop. Original title: passing traffic belgium. Source: https://freesound.org/people/gecop/sounds/518411/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/urban-traffic.mp3`. SHA-256: `3d8affecb1527e463b404081879d5aa434084e6ec6c0b2b7a5f494701bde30ea`. Preparation: Prepared excerpt 0.0–24.0 seconds of the source preview; no complete-recording claim. 5 ms entry and 150.0 ms exit click guards; natural internal dynamics retained. Uniform peak attenuation -0.301 dB; no compressor or automatic levelling. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Repeat boundary uses the inherited mixer 80 ms equal-power wrap crossfade; no engine changes. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Pedestrian crossing signal Creator: hz37. Original title: Contact mic recording of a Dutch pedestrian crossing. Source: https://freesound.org/people/hz37/sounds/792377/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/urban-crossing.mp3`. SHA-256: `26240fb0619c17054f6422beea9296001b503a235e47daeae4d0bcf6426bb9fe`. Preparation: Prepared excerpt 0.0–30.38 seconds of the source preview; no complete-recording claim. 5 ms entry and 150.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Distant ambulance siren Creator: kyles. Original title: siren ambulance european distant echo nice with steps to clean.wav. Source: https://freesound.org/people/kyles/sounds/451068/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/urban-siren.mp3`. SHA-256: `3eb50522cafb3b830ac8efea18789208e51633cedb5dc8eb8a0e790d4bd42833`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Keys jingling Creator: vmgraw. Original title: Keys Jingling. Source: https://freesound.org/people/vmgraw/sounds/235614/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/home-keys.mp3`. SHA-256: `b75ae487d82be27299d4e440039f49463f5129227065125737c4e210e9e22404`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Uniform peak attenuation -1.812 dB; no compressor or automatic levelling. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Crockery handling Creator: Melilaura. Original title: crockery.mp3. Source: https://freesound.org/people/Melilaura/sounds/533371/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/home-crockery.mp3`. SHA-256: `af01ebcb2c2db14573fcdc73a75f2f4230984e5e05a43ef6b6f00603abcf64f2`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Kitchen tap Creator: Joao_Janz. Original title: Kitchen Sink Tap Water Opening And Closing Very Soft.wav. Source: https://freesound.org/people/Joao_Janz/sounds/473713/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/home-tap.mp3`. SHA-256: `ab97fd730ed760ea7511dcb0316216fa1ad9e409d2c527d13cbdc18d6e9bceb3`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Creaking floorboard Creator: deleted_user_2104797. Original title: Creak_floorboard 31.wav. Source: https://freesound.org/people/deleted_user_2104797/sounds/164523/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/home-floorboard.mp3`. SHA-256: `a0ea3ab09ca64f432c852536848f369f6d7ebea60dcddd5b163d61b6b124eabd`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Night insects Creator: RyanKingArt. Original title: Southern Summer Evening Ambience with Crickets 2. Source: https://freesound.org/people/RyanKingArt/sounds/746363/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/nature-crickets.mp3`. SHA-256: `88446910579582ea2d720a209e68184adbef55d3b3248e9d73fdd2d8b3518876`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Repeat boundary uses the inherited mixer 80 ms equal-power wrap crossfade; no engine changes. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Distant owl Creator: SyntaxSeed. Original title: Owl-4. Source: https://freesound.org/people/SyntaxSeed/sounds/871240/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/nature-owl.mp3`. SHA-256: `cb25b5a23cf0118955dff5a560d0798e2bd59f0895bbb03f8d18596d42c61b30`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Waves on the shore Creator: straget. Original title: Big waves hit land.wav. Source: https://freesound.org/people/straget/sounds/412308/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/nature-waves.mp3`. SHA-256: `40604bb898fddd3c0fc6144827d86e0905547c2466ecbe95e7e39077ce6410e1`. Preparation: Prepared excerpt 0.0–24.0 seconds of the source preview; no complete-recording claim. 5 ms entry and 150.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Repeat boundary uses the inherited mixer 80 ms equal-power wrap crossfade; no engine changes. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Flowing stream Creator: yurkobb. Original title: water-stream-enclosed.wav. Source: https://freesound.org/people/yurkobb/sounds/393335/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/nature-stream.mp3`. SHA-256: `0044fd302c532cc2b38628213622ecbe1d8e69386185c3a2cf1e17a408069cb3`. Preparation: Prepared excerpt 0.0–24.0 seconds of the source preview; no complete-recording claim. 5 ms entry and 150.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Repeat boundary uses the inherited mixer 80 ms equal-power wrap crossfade; no engine changes. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Snapping branches Creator: KieranKeegan. Original title: Branches being snapped. Source: https://freesound.org/people/KieranKeegan/sounds/434555/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/nature-branch.mp3`. SHA-256: `c6140972c287aa166ca2b80bcdb203cb9fb6d785f929ff641f50ed8020313090`. Preparation: Prepared excerpt 0.0–30.97 seconds of the source preview; no complete-recording claim. 5 ms entry and 150.0 ms exit click guards; natural internal dynamics retained. Uniform peak attenuation -1.172 dB; no compressor or automatic levelling. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Vending machine motor Creator: Kyodon. Original title: vending machine motor.wav. Source: https://freesound.org/people/Kyodon/sounds/153419/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/machine-motor.mp3`. SHA-256: `f7b85e7e9cee6666fd86c0e5760e431c6479b20eccf11714504b4ac6d9bf8eb9`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Repeat boundary uses the inherited mixer 80 ms equal-power wrap crossfade; no engine changes. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Metal impact and rattle Creator: SoundDesignForYou. Original title: METLImpt_Metal Resonant Impact With Rattle_SDFY_Metal Resonant.wav. Source: https://freesound.org/people/SoundDesignForYou/sounds/697754/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/machine-metal.mp3`. SHA-256: `6d1480dde77a0762a8c95ccba1ed88546ed8822cb897db2cbb9f2a5cbfdcb97a`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Bicycle bell Creator: Kinoton. Original title: Bicycle Bell Ringing. Source: https://freesound.org/people/Kinoton/sounds/431320/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/transport-bicycle.mp3`. SHA-256: `b334c2a948bacc48fccafc8cd5ca9a613f010d875116295b939c5a9447e03daa`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Passing train Creator: jakobhandersen. Original title: Trains passing in Helsinki - xy -9.wav. Source: https://freesound.org/people/jakobhandersen/sounds/482205/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/transport-train.mp3`. SHA-256: `d3209363b294610c02e1afcdf5a2034a05033da755ee681b01b4903102ffa716`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. ## Bus idling Creator: Mihacappy. Original title: bus_idle_long.wav. Source: https://freesound.org/people/Mihacappy/sounds/803762/ Licence: CC0-1.0. https://creativecommons.org/publicdomain/zero/1.0/ Checked: 2026-10-29. Local file: `assets/new/transport-bus.mp3`. SHA-256: `48f8663e12762a6e985cceeda6617e0e08d38d2fbe7d81d78af4add4ea24c927`. Preparation: 5 ms entry and 10.0 ms exit click guards; natural internal dynamics retained. Decoded public high-quality MP3 preview, prepared at stereo 44.1 kHz, encoded MP3 192 kbps. Repeat boundary uses the inherited mixer 80 ms equal-power wrap crossfade; no engine changes. Redistribution: Individual item CC0 dedication allows copying, modification, local redistribution and commercial reuse. Credit retained voluntarily. Public preview endpoint supplied by the source page; no account, API key or download restriction bypass. # V0.7a R2 additions 26 reviewed CC0 additions retain exact prepared-file bytes. All use lossy HQ MP3 preview sources; prepared WAV loops are not lossless originals. Individual captured source-page snapshots and full acquisition/transform records are in the review provenance. The live evidence pages are inert summaries. Positive owner listening feedback authorises this prototype integration; public release remains unapproved. Existing procedural-audio descriptions above describe provenance and permitted prototype inclusion. They do not establish exclusive copyright. See AUDIO_ASSET_PROTECTION.md for ownership uncertainties and third-party rights. ## School locker handling ID: r2-school-locker. Creator: loganzsound. Original title: High School Locker Handling Denoised. Source: https://freesound.org/people/loganzsound/sounds/873426/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-school-locker.mp3. SHA-256: 5d6fb557820a151082987a686f6bedb852ef8b8b4c915ebafdd2bd4220e75fba. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Pencil writing ID: r2-pencil-writing. Creator: Vrymaa. Original title: Draw & Trace - Pencil. Source: https://freesound.org/people/Vrymaa/sounds/753216/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-pencil-writing.wav. SHA-256: 60a9152cf79e25a05a346bbfdbe4024cdf45dfd69b7cb9be92172ba7f32fd0bc. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Writing on a chalkboard ID: r2-chalk-board. Creator: Soundscape_Leuphana. Original title: 20131209_writing on a blackboard_OlympusLS10_xy.wav. Source: https://freesound.org/people/Soundscape_Leuphana/sounds/210319/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-chalk-board.mp3. SHA-256: 5ec169808052b430cb80eb3f52afe5a1ba8edb97bf7a571138f2b1f0fab82c14. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Footsteps in a stairwell ID: r2-stairwell-footsteps. Creator: RutgerMuller. Original title: Japan_Matsudo_Hotel_Stairwell_Footsteps.wav. Source: https://freesound.org/people/RutgerMuller/sounds/365412/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-stairwell-footsteps.mp3. SHA-256: 94a5e721d054071f8a8eb28f5c4b531fb17c8fceed24ef454715172ab9e87f2d. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Photocopier switching on ID: r2-photocopier. Creator: mariiao2. Original title: photocopierOnOff.wav. Source: https://freesound.org/people/mariiao2/sounds/232813/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-photocopier.mp3. SHA-256: b409f6f671950a5e001c0716506e99dd37c4165d1ae1643c77efc8525a3477a4. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Desk drawer closing ID: r2-desk-drawer. Creator: sechavez3499. Original title: Desk drawer closing.wav. Source: https://freesound.org/people/sechavez3499/sounds/586511/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-desk-drawer.mp3. SHA-256: 074d4edde4d104b065c0e2f495e80e0007afec1c9e9794194a58edc699ab1b20. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Office hallway ventilation ID: r2-office-ventilation. Creator: kyles. Original title: room tone office hallway heavy ventilation.flac. Source: https://freesound.org/people/kyles/sounds/637804/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-office-ventilation.wav. SHA-256: 60d7d366537f0dd74601d1727f0fd0280dcf1d6f3df27a3e14af6cf38297a528. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Phone vibrating on wood ID: r2-phone-vibration. Creator: metaxis. Original title: Smart Phone Vibration - Short - Wood Surface - MONO. Source: https://freesound.org/people/metaxis/sounds/708216/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-phone-vibration.mp3. SHA-256: d89fc3a14dbe855ddb5f3d94a7125b942dc8d656a05685e912877d3e66b3cc15. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Stapler ID: r2-stapler. Creator: giddster. Original title: Stapler 2. Source: https://freesound.org/people/giddster/sounds/360492/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-stapler.mp3. SHA-256: d781dd42121453aa2aea0fb00c611028a7e8da3c9216166d14481d85a5e129f2. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Soft footsteps on wood ID: r2-wood-footsteps. Creator: SpliceSound. Original title: Footsteps, Solid Wood, Female Socks, Scuffs.wav. Source: https://freesound.org/people/SpliceSound/sounds/148802/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-wood-footsteps.mp3. SHA-256: 562f3ef496450ae2289d7a2ef6f40781c1d6aa9c3532c530e648b1bbbb1736b3. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Gravel footsteps ID: r2-gravel-footsteps. Creator: IENBA. Original title: Footsteps On Gravel. Source: https://freesound.org/people/IENBA/sounds/818562/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-gravel-footsteps.mp3. SHA-256: 315e0fd0655d0287e75c8c3cfb7ea52147c1d0b37bd93b322ede549e02ac1b4c. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Running and stopping on gravel ID: r2-running-gravel. Creator: KikeVilaplana. Original title: Footsteps Gravel Running-Stop. Source: https://freesound.org/people/KikeVilaplana/sounds/436525/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-running-gravel.mp3. SHA-256: 9ea6424a39baeac022ee1d28701cc321ee1d35dbf79b17cea300e63ee2318dee. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## High heels on wood ID: r2-high-heels. Creator: Vrymaa. Original title: Footsteps High Heels - Hardwood, walk & run. Source: https://freesound.org/people/Vrymaa/sounds/753292/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-high-heels.mp3. SHA-256: b1f28e6a1715105fec3274cf9510f43a1ab414ae086668571b399cd2022df215. Source quality: Preview-quality source material: lossy HQ MP3 preview, not the lossless original. ## Car passing on a wet road ID: r2-car-wet-pass. Creator: TSP-Talk. Original title: Passing Car on Wet Road – Residential Ambience (Altenthann, 20 m Distance, Open Window) - 260224_002. Source: https://freesound.org/people/TSP-Talk/sounds/846301/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-car-wet-pass.mp3. SHA-256: 52225ee78fb8652fc0b5379f2af2e2555a2ed5fa5290a93105ea9dc3b1d7c0d0. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Distant night traffic ID: r2-night-city. Creator: brunoboselli. Original title: Quiet Night Traffic. Source: https://freesound.org/people/brunoboselli/sounds/871593/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-night-city.wav. SHA-256: 75f9de01be6fc1678fa92d8f7aaae4a19349bd9e47b385e434b30cb717f1f82f. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Bus driving away ID: r2-bus-departure. Creator: freemaster2. Original title: Bus idle and drive away. Source: https://freesound.org/people/freemaster2/sounds/691635/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-bus-departure.mp3. SHA-256: 4a9573f10173c7bfc60f0f5dab5bb2e8021de137dc285eace145df986c1a6b5a. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Rail crossing and train ID: r2-rail-crossing. Creator: Zott820. Original title: Light Rail Train Passing. Source: https://freesound.org/people/Zott820/sounds/655704/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-rail-crossing.mp3. SHA-256: 590513739aa35a7f047c778fa8aec0d3b99a76219f864bedcce97c329147a238. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Light rain drops ID: r2-light-rain. Creator: rcproductions54. Original title: Rain Drops Outside. Source: https://freesound.org/people/rcproductions54/sounds/265045/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-light-rain.wav. SHA-256: f6fdd07fa4c88c6835a240140d06a99a5eb7766b6a6c64bac742a3d7c3d3c5fb. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Rain on foliage ID: r2-rain-foliage. Creator: Cinetony. Original title: Rain outdoor leaves. Source: https://freesound.org/people/Cinetony/sounds/672696/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-rain-foliage.wav. SHA-256: d98840554b2f05bd87e0c45a2aa4d9f8c94f74ec641d4329f38bdac0f551595f. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Muffled thunder roll ID: r2-rolling-thunder. Creator: TRP. Original title: Rolling thunder short muffled ms 77mel 190903.flac. Source: https://freesound.org/people/TRP/sounds/574391/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-rolling-thunder.mp3. SHA-256: df0dc73ed9c7ccb5efc974901279c666c6048403acb2cd28ff835fbe1912e8ce. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Wind and window tapping ID: r2-window-wind. Creator: jpjurilla. Original title: howling wind-window tapping.WAV. Source: https://freesound.org/people/jpjurilla/sounds/562342/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-window-wind.wav. SHA-256: f5da0dc8021456741297ef5ea2e386d727a12a393eeefdb2f378b77da6e654df. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Creaking fan ID: r2-rattling-fan. Creator: Saltbearer. Original title: creaky fan.wav. Source: https://freesound.org/people/Saltbearer/sounds/473627/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-rattling-fan.wav. SHA-256: 425432539d544f643b8d653f76ce899d4a6db236df17f4966c9841b200462b30. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Motor behind a metal door ID: r2-industrial-motor. Creator: kyles. Original title: industrial generator or motor of some kind on and off behind metal plate door in hospital.wav. Source: https://freesound.org/people/kyles/sounds/406310/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-industrial-motor.wav. SHA-256: 66e3480677da2b636ae07222fcd38d2cdcac456bbe605d46804dbcbcf478bb8d. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Lift doors closing ID: r2-lift-door. Creator: jchamusantana. Original title: Elevator Sounds - Door Closing.wav. Source: https://freesound.org/people/jchamusantana/sounds/634353/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-lift-door.mp3. SHA-256: 25e0e33e1d136153cf8f69f0746ae44fca8e1f8a9f878e1a6e1bef0e64638450. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Machine servo movements ID: r2-servo-movement. Creator: pencilina. Original title: industrial 3d cutter acoustic.wav. Source: https://freesound.org/people/pencilina/sounds/442244/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-servo-movement.mp3. SHA-256: 6d1ea1ee3d06b0a2e8430546688b7a37aadf9f0c236146c9a7c6a00726717d81. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity. ## Electric drill ID: r2-electric-drill. Creator: innov8_Music. Original title: Electric Drill. Source: https://freesound.org/people/innov8_Music/sounds/871631/ Licence: CC0 1.0 Universal — https://creativecommons.org/publicdomain/zero/1.0/. Individually verified 2026-10-29. Prepared file: assets/r2/r2-electric-drill.mp3. SHA-256: e1d56611a8639cf40e879af34aefdd84ff1c4a32cbd3e46c412990ab0baaed90. Source quality: Preview-quality source material: public high-quality MP3 preview. Prepared PCM output, where supplied, does not restore original lossless fidelity.