What Is Dither?
Updated October 2026
Dither is a very small amount of noise added when you reduce the bit depth of a recording, such as from 24 to 16 bit. It hides the rounding error, which otherwise can sound like distortion in quiet passages.
The short version
- Dither is added when reducing bit depth, for example to 16 bit.
- It replaces harsh rounding distortion with a smooth, very quiet noise.
- Apply it once, at the last step of export.
- Do not dither a file more than once, and do not dither while editing.
The short definition
When a recording is reduced from a higher bit depth to a lower one, the values are rounded. In very quiet passages the rounding can sound like a harsh distortion. Dither adds a tiny noise that breaks up that pattern.
When it matters
Reducing a master to 16 bit for a CD or a format that needs it. For a voice recording with a noisy floor, dither is mostly hidden, but it is still the correct step.
When not to use it
Do not dither while you edit, because each dither adds noise. Apply it once, as the last step of the export.
In Tunedzy
Exports to 16-bit formats can use dither at the export step. Check the export setting for your version.
Dither once, at the end
Tunedzy exports from a high-precision master. Apply dither only at the final bit-depth reduction.
Free tools for this
Frequently asked questions
Does dither add audible noise?
A very small amount, and it is designed to be hidden. It is safer than rounding distortion.
Should I dither a 24-bit master?
Only when reducing bit depth. Keep the master at 24 bit.
Is dither the same as noise reduction?
No. Dither adds a controlled tiny noise; noise reduction removes noise.
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