# DOME / SEAT audio credits

These sound effects are edited from publicly available Freesound MP3 previews, retrieved on 2026-09-09. Their original recording formats and resolutions differ from the mobile web derivatives supplied here. None is extracted from a television broadcast. Files are hosted locally with the application, not streamed from Freesound at runtime.

## bat-crack.mp3

“Baseball Hitting Bat.wav” by SocializedArtist45, Freesound, 2015.
Source: https://freesound.org/people/SocializedArtist45/sounds/266595/
License: Creative Commons Attribution 3.0 Unported (CC BY 3.0)
License link: https://creativecommons.org/licenses/by/3.0/
Source audio: https://cdn.freesound.org/previews/266/266595_4969808-lq.mp3
Changes: converted to mono, gain adjusted, short fade-out, MP3 re-encoding. The creator describes striking a baseball with an old wooden board rather than a bat.

## glove-pop.mp3

“Baseball Into Glove.aif” by keus92, Freesound, 2018.
Source: https://freesound.org/people/keus92/sounds/432502/
License: CC0 1.0 Universal
License link: https://creativecommons.org/publicdomain/zero/1.0/
Source audio: https://cdn.freesound.org/previews/432/432502_3972347-lq.mp3
Changes: extracted 0.465–0.825 seconds, converted to mono, gain adjusted, fades, peak limiting, MP3 re-encoding.

## pitch-prepare.mp3

“Footsteps Dirt 01” by aglinder, Freesound, 2015.
Source: https://freesound.org/people/aglinder/sounds/264469/
License: CC0 1.0 Universal
License link: https://creativecommons.org/publicdomain/zero/1.0/
Source audio: https://cdn.freesound.org/previews/264/264469_1042839-lq.mp3
Changes: extracted 0.41–1.96 seconds, converted to mono, gain adjusted, fades, peak limiting, MP3 re-encoding. Recorded dirt/gravel footsteps are used as pitcher/batter preparation foley.

## crowd-cheer.mp3

“CRWDCheer_Cheering, Whistling, No Clapping_ShaneVincent_GSC24_SpacedOmni-MK012.wav” by Shane Vincent (ShangusBurger), Freesound, 2024; with GameSoundCon 2024 walla-session performers credited on the source page.
Source: https://freesound.org/people/ShangusBurger/sounds/764273/
License: CC0 1.0 Universal
License link: https://creativecommons.org/publicdomain/zero/1.0/
Source audio: https://cdn.freesound.org/previews/764/764273_11744683-lq.mp3
Changes: extracted 0.94–8.14 seconds, fades, peak limiting, MP3 re-encoding. The source is a directed group voice recording created for CC0 release, not a recording of a specific baseball game or venue.


# Additional DOME / SEAT audio credits

Retrieved on 2026-09-09. These edited MP3 files are derived from Freesound's publicly available MP3 previews. They are not extracts from the user's YouTube reference videos.

## bat-swing.mp3

“Bamboo Swing, A12.wav” by InspectorJ (www.jshaw.co.uk), Freesound, 2017.
Source: https://freesound.org/people/InspectorJ/sounds/394412/
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
License link: https://creativecommons.org/licenses/by/4.0/
Source audio: https://cdn.freesound.org/previews/394/394412_5121236-lq.mp3
Changes: extracted 0.25–0.57 seconds, mono conversion, 6 dB gain adjustment, fades, peak limiting, MP3 re-encoding. The recording is a quick swing of bamboo close to a recorder, used as bat-swing foley. Preserve this author, source, license link, and modification notice in the application's audio credits.

## stadium-prepare.mp3

“Stadium Crowd” by stomachache, Freesound, 2015.
Source: https://freesound.org/people/stomachache/sounds/274516/
License: CC0 1.0 Universal
License link: https://creativecommons.org/publicdomain/zero/1.0/
Source audio: https://cdn.freesound.org/previews/274/274516_177850-lq.mp3
Changes: extracted 0.5–7.3 seconds, 21 dB gain adjustment, 110 Hz high-pass filter, 8 ms edge fades, peak limiting, stereo MP3 re-encoding. Runtime looping crossfades the decoded buffer boundary. The source is described as general crowd noise recorded at a sports stadium; it is not asserted to be Taipei Dome audio.

## User references (not included in the distributed audio)

- 音效BB: “棒球场①‖视频音效‖Video Sound Effect‖Baseball Stadium①” (77 seconds), https://www.youtube.com/watch?v=Zvu7U1eMAn8 . Public metadata verified; empty description and no explicit reuse license found.
- Gravity Sound: “Baseball Sound Effects All Sounds [No Copyright]” (40 seconds), https://www.youtube.com/watch?v=rdvBPKH98HA . Public metadata and description verified. The description links an official free-download library and a paid 107-sound pack. The free library was inspected read-only, without submitting signup data or buying anything; the exact baseball demo and its individual reuse license were not established. No audio was extracted from this video.

## Contact-aligned revisions: bat-crack-aligned.mp3 and glove-pop-aligned.mp3

These replace the application's existing bat-crack.mp3 and glove-pop.mp3. Original authors and licenses remain unchanged:

- Bat: “Baseball Hitting Bat.wav” by SocializedArtist45, https://freesound.org/people/SocializedArtist45/sounds/266595/ , CC BY 3.0, https://creativecommons.org/licenses/by/3.0/ . Changes: prior mono conversion, gain adjustment and tail fade; now additionally removed the first 100 ms of the decoded application derivative, applied a 2 ms onset fade and 8 ms tail fade, and re-encoded at 96 kbps mono MP3. Preserve the author, source, license, and modification notice when distributing this revision.
- Glove: “Baseball Into Glove.aif” by keus92, https://freesound.org/people/keus92/sounds/432502/ , CC0 1.0, https://creativecommons.org/publicdomain/zero/1.0/ . Changes: prior excerpt selection, mono conversion, gain adjustment, fades and limiting; now additionally removed the first 37 ms of the decoded application derivative, applied a 2 ms onset fade and 8 ms tail fade, and re-encoded at 96 kbps mono MP3.

Measured with decoded 24 kHz audio, using 5 ms RMS windows: bat dominant transient moved from 112.5 ms to 12.5 ms; glove from 52.5 ms to 17.5 ms. Both now begin their strong transient within approximately 5 ms of playback start. These are file-level measurements, excluding the device/browser's output latency.

Playback note: Crowd ambience and cheering are joined with a 350 ms tail/head crossfade for looping. Replay one-shots use reduced playback rates (0.8 for swing, 0.9 for impact) and slightly lower gain.
# DOME / SEAT home-run hit sound

## homer-hit.mp3

“Hitting baseball w. wooden bat.wav” by CGEffex, Freesound, 2010.
Source: https://freesound.org/people/CGEffex/sounds/93136/
License: Creative Commons Attribution 4.0 International (CC BY 4.0)
License: https://creativecommons.org/licenses/by/4.0/
Source MP3 preview: https://cdn.freesound.org/previews/93/93136_1386366-lq.mp3
Retrieved: 2026-09-09.

The source author describes this recording as several baseball hits with a wooden bat. This is a separate recording from the ordinary-hit sound already used in the app. It is used as home-run sound design, not claimed to be a recording of a particular real home run or Taipei Dome.

Changes: extracted 15.716–16.236 seconds from the publicly available preview after accurate decoding; converted to mono; applied a 140 Hz high-pass filter, +5 dB EQ at 2.9 kHz (Q 0.8), +2 dB treble at 4.5 kHz; 1 ms opening fade, tail fade from 100 ms through 520 ms; peak-normalized and encoded as 24 kHz, 96 kbps MP3. These adjustments emphasize the sharp wooden crack and shorten the decay.

Preserve author credit, source URL, CC BY 4.0 license link, and the modification notice in the application's audio credits. No attribution to a supplied YouTube video is required because none of its audio was used.

File check: 7,244 bytes, 0.520-second decoded duration. Dominant 5 ms RMS peak at +7.5 ms; individual sample peak at +5 ms; decoded peak -2.7 dBFS. The attack starts immediately. Measurements exclude browser/device output latency.