3.4 Dithering

Dithering is a technique used to maximise the dynamic range of audio stored at a particular bit-depth. Any distortion introduced by quantisation is decorrelated by adding a small amount of white noise to the signal.

You might want to add TPDF dither if any of the following are true:

• bit-depth reduction has been specified explicitly using the Bits option
• an effect has increased effective bit-depth within the internal processing chain

For example, adjusting volume with "vol 0.25" requires two additional bits in which to losslessly store its results (since 0.25 decimal equals 0.01 binary). So if the input sample bit-depth is 16, then the plugin's internal representation will utilise 18 bits after processing this volume change. In order to store the output at the same depth as the input, dithering can be used to remove the additional bits.

To apply dithering to the sound processing chain, just add the dither effect as the last effect.