Why is my exported WAV bigger than the MP3?

The short answer

Compressed formats such as MP3 usually store less data than uncompressed PCM WAV. Editing tools decode audio into samples and SurStudio exports WAV, so a larger output is expected. A larger file does not mean the lost details of the compressed source have returned.

Try this workflow

1. Check the recording duration and export bit depth.
2. Use 16-bit when you want a smaller WAV.
3. Download only the clip or stem you need if storage is limited.

What to check before you finish

Four full-length stems can consume much more space than one compressed source. Keep enough storage available before downloading a ZIP. If a smaller compressed delivery file is required, use a separate encoding workflow after reviewing the WAV.

A practical example

A three-minute compressed song can become a noticeably larger WAV, and four stem WAVs multiply the storage need. If you only want a ten-second drum phrase, trim the needed part rather than storing all full-length outputs. Make download decisions based on the actual task, especially when your device has limited free space.

More questions

Does a larger WAV prove better sound quality?

No. Size reflects storage format and duration, not automatically a better source or cleaner processing.

Does ZIP turn four WAVs into one audio track?

No. It packages separate files in an archive. Use the custom-mix export when you want one playable combined audio file.