SOUND FLIPPER GUIDES
Batch-convert audio without losing track of results
Prepare a mixed batch, keep clear filenames, handle individual failures and download verified results without overwriting your originals.
By Singularity Shift Ltd · Updated · Preview guide
Start with a small representative batch
A batch saves repeated selection and settings work, but its files may have different rates, codecs, durations and channels. Begin with two or three representative recordings. Check that the chosen destination is appropriate for each before processing a larger group.
The preview accepts up to ten selected files and processes one conversion job at a time. This keeps quality settings consistent and avoids running many audio encoders at once. A slow device is not assigned a lower-quality encoder merely to make the progress bar move faster.
Read each inspection result
A music-rate WAV, a low-rate speech memo and an M4A with AAC are different sources. MP3 bitrate restrictions can differ by rate. A floating-point source cannot use the current integer-only FLAC/ALAC path without a precision change, so that request is refused. A corrupt recording can fail while the other files remain usable.
Do not treat a batch as one undifferentiated success. Check the status and warnings for every output. Retry a failed job from its original source after resolving the cause; do not use an earlier lossy result as the retry input.
Names and versions
Use descriptive names such as Interview - MP3 and Interview - WAV. Distinct output names and collision handling help avoid confusing recordings with identical original names. Your source files are not overwritten by the converter. Saved format presets and settings links can reduce repeated setup, but they are not a backup of the audio.
The interface supports up to three output configurations. That makes it possible to prepare delivery versions for different destinations. Each new lossy output should come from the original source, not from another delivery version. Review the profile name as well as its format.
Downloads and local space
Individual downloads let you recover successful outputs even if creating a ZIP is not possible. An archive also needs temporary space. If the browser reports a quota or memory limit, download what is ready, clear completed results, and retry a smaller selection. Do not assume a displayed input limit guarantees enough resources for the largest possible batch.
Closing or crashing a tab may leave temporary browser files. Clear results when finished; later cleanup can remove abandoned sessions where browser locking is available. See local storage and privacy for the distinction between temporary data and downloaded files.
A finishing checklist
Check the number of successful outputs, their filenames, codec, duration and playback. Open a downloaded example outside the converter, and confirm the receiving service accepts it. Keep the original collection until you have verified the delivery copies. Start at the batch converter; report a failure using browser/version, formats and the exact message rather than sending your private files.