An audio file refusing to play is usually simpler than it seems. Work through the possible causes in order and most cases resolve quickly.
Quick Checklist
- Try a different app. VLC for Android and iOS plays almost every format — if it plays in VLC but not your default app, the issue is the app, not the file.
- Check the file extension. A file saved as
.mp3that is actually a different format won't play correctly. Re-download or get the original. - Confirm the file isn't empty. An unusually small file (a few bytes) was probably a failed download.
- Download again. Interrupted downloads produce broken files that look complete.
Common Format Problems
| Format | Common issue | Fix |
|---|---|---|
| M4A | Some non-Apple apps don't support it | Convert with M4A to MP3 |
| FLAC | Not all mobile apps support it | Convert with FLAC to MP3 |
| WAV | File is very large; some streaming apps skip it | Convert with WAV to MP3 |
| OGG | Limited mobile app support | Convert to MP3 |
| WMA | Windows Media format; poor mobile support | Convert to MP3 |
| AAC in M4A | Generally fine; some older devices struggle | Convert to MP3 if needed |
When VLC Also Fails
If a file won't play even in VLC, the file is likely damaged:
- Re-download the file from the source.
- Ask for a new copy if someone sent it to you.
- Check the file size — a 3-minute song should be at least 2–3 MB at typical quality; a few KB suggests a failed download.
After Converting
Download the converted file and try playing it before deleting the original. For audio that is too large after the conversion fixes the compatibility problem, compress with Audio Compressor. For format comparisons and which formats play where, see MP3 vs WAV vs FLAC vs M4A.
Audio That Plays but Sounds Wrong
A separate category from audio that won't play at all: audio that plays but sounds distorted, has an unusual pitch, or is clearly corrupted. This is almost always a damaged file rather than a format issue. For audio downloaded from the internet or transferred over an unreliable connection, re-downloading usually resolves it. For audio recorded on a phone or computer, check whether the recording app encountered an error — some apps silently corrupt recordings when storage runs low or when interrupted during writing. For conversions that produce degraded-sounding audio, see why converted audio sounds worse. For comparing which formats play where, see MP3 vs WAV vs FLAC vs M4A.
