Sample MP3 audio files for testing, free, CC0 and hotlinkable
mp3/sine-440hz-3s.mp3 is the baseline, 128 kbps stereo at 48 kHz, and its measured 3,024 ms
are three seconds plus the padding MP3 adds to fill whole frames, which a duration check that
expects exactly three seconds gets wrong.
mp3/stereo-lr-5s.mp3 measures 440 Hz in the left channel and 880 Hz in the right, so a
pipeline that swaps or downmixes channels changes which tone comes out where.
mp3/silence-5s.mp3 is a valid MP3 with no tone in either channel, for code that treats
silence as a failed decode.
mp3/with-id3v2-tags-3s.mp3 carries ID3v2 tags and a 100x100 PNG cover, which ffprobe
reports as a video stream: an upload validator that refuses audio with a video stream refuses
an ordinary tagged MP3. mp3/sine-440hz-30s.mp3 runs 30,024 ms, long enough to test seeking
and scrubbing.
mp3/1mb.mp3 is 996,116 bytes at a constant 128 kbps, so its 62,232 ms follow from its size.
mp3/10mb.mp3 is 9,950,996 bytes and 621,912 ms of the same stream, for upload limits and
players that must stream rather than load.
| File | Size | Properties | Description |
|---|---|---|---|
10mb.mp3
|
10 MB (9,950,996 bytes) | 621.912 s, mp3 | About 10MB of 440 Hz sine at a constant 128 kbps, roughly ten minutes of audio.
Snippets |
1mb.mp3
|
996.1 KB (996,116 bytes) | 62.232 s, mp3 | About 1MB of 440 Hz sine at a constant 128 kbps, so the duration follows from the size rather than the other way round.
Snippets |
silence-5s.mp3
|
81 KB (81,044 bytes) | 5.04 s, mp3 | Five seconds of digital silence: a valid MP3 with nothing in it, for code that treats silence as failure.
Snippets |
sine-440hz-30s.mp3
|
480.8 KB (480,788 bytes) | 30.024 s, mp3 | A 440 Hz sine wave, thirty seconds, 128 kbps stereo, long enough to test seeking and scrubbing.
Snippets |
sine-440hz-3s.mp3
|
48.8 KB (48,788 bytes) | 3.024 s, mp3 | A 440 Hz sine wave, three seconds, 128 kbps stereo. The smallest useful audio sample. Measured duration is 3024 ms: 1152 samples past three seconds at 48 kHz, which is exactly one MP3 frame.
Snippets |
stereo-lr-5s.mp3
|
81 KB (81,044 bytes) | 5.04 s, mp3 | 440 Hz in the left channel, 880 Hz in the right. If your pipeline swaps or downmixes channels, this is the file that shows it.
Snippets |
with-id3v2-tags-3s.mp3
|
51.5 KB (51,480 bytes) | 100x100, 3.024 s, png, mp3 | Three seconds of 440 Hz carrying ID3v2.3 tags: title, artist, album, year and a PNG cover image taken from the published 100x100 fixture.
Snippets |
Every MP3 file in one command, each checked against its hash: npx loremfile get --format mp3, or loremfile get --format mp3 after pip install loremfile.
Related formats
File names follow the naming grammar. Verify a download against sha256sums.txt.