Troubleshooting
WAV file is unexpectedly large
Uncompressed PCM size grows directly with duration, sample rate, bit depth, and channel count.
Reviewed against current browser behavior and AudioFetcher test fixtures on July 28, 2026.
Check these first
- 1
Check duration for accidental silence.
- 2
Check sample rate and channels.
- 3
Calculate expected PCM size.
- 4
Compare against a losslessly compressed FLAC copy.
Reliable fixes
- Use FLAC for lossless storage.
- Use MP3 for delivery where loss is acceptable.
- Do not lower sample rate blindly in a production master.
Change one variable at a time and test with a short known-good file. That separates a damaged source from a browser, codec, or memory limitation.
Questions about WAV file is unexpectedly large
What is the short answer to "WAV file is unexpectedly large"?
Uncompressed PCM size grows directly with duration, sample rate, bit depth, and channel count.
Does the linked AudioFetcher tool upload my media?
The local tools linked from this article process selected media in the browser. Read each tool's limits before using a large or uncommon file.
What is the most important practical point?
Use FLAC for lossless storage.