Reducing PCM bit depth: choose dither at the final export
Reducing integer PCM bit depth rounds audio to a coarser set of amplitude values. Dither is deliberate low-level noise used in an appropriate conversion to change the character of quantization error. It is not noise removal, a sample-rate setting, or a way to recover detail discarded by an earlier compressed source.
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Identify the conversion that is actually happening
Inspect the intended output codec, sample rate and sample representation separately. A change from a floating-point working project to integer PCM can require a quantization decision even when both files use the same sample rate. A change from 48 kHz to 44.1 kHz concerns samples over time and is a different operation. Do not select a dither option merely because one number became smaller.
Keep the original recording and a suitable working master. The editor's internal precision describes its processing environment, not the precision of the microphone or retained source. If an AAC recording was decoded for editing, exporting a deeper PCM file does not restore information lost during AAC encoding. State the source and derivative roles in the handoff notes.
Choose the documented export path once
Read the installed editor's sample-format and export documentation. Determine where integer conversion happens and whether dither is applied automatically, selected explicitly or disabled. Do not add a second noise stage blindly after an exporter has already performed the intended conversion. Likewise, do not assume every compressed-audio export uses the same PCM dither decision as a reduced-depth WAV.
Finish level changes and other processing before making the final reduced-depth delivery. Reopening that delivery for further gain changes and repeatedly exporting it can introduce additional processing. Retain the higher-precision working file for revisions instead. Noise-shaped and unshaped options distribute noise differently; use the recipient's requirements and the editor's documentation rather than declaring one preset universally best.
Verify the saved file and quiet passages
Check the output codec, sample rate, integer depth and channel arrangement in the actual exported file. Listen to quiet tails, fades and pauses as well as normal speech, using a comfortable monitoring level. Low-level noise deliberately introduced by dither is different from a damaged recording, but an unexpectedly loud hiss calls for investigation of gain, source noise and export settings.
Compare with the working master without changing playback volume between them. Confirm that no final processing stage clipped peaks or shortened a fade. An apparently deeper metadata label is not proof of greater captured detail, and absence of an obvious audible difference does not establish a conversion's history. SocialVidDownloader does not expose a PCM dither selection or mastering control; perform this operation in an appropriate audio editor and keep its export settings with the delivered file.
Worked example
Example: a 48 kHz floating-point editing master must be supplied as 48 kHz 16-bit PCM. The sample rate stays unchanged, but integer amplitude conversion still occurs. Finish the edit, use the documented final dither setting once, inspect the saved PCM depth and audition the quiet ending. Keep the working master for later revisions.
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Sources and verification
Reviewed 2026-10-12. Product behavior is limited to available source formats and provider access; it is not a promise that every public link works.