Bitrate, mode, and character
Bitrate sets the overall quality budget. Mode changes the severity of the underlying quantization, while Character scales several artifact systems together to provide four starting attitudes.
Bitrate runs from 8 to 128 kbps. Lower settings reduce high-frequency detail, increase stepping, and make the artifact controls more pronounced.
Cleanish uses the less aggressive quantization behavior.
Nasty reduces the available resolution and increases the severity of low-bitrate movement.
Clean reduces smear, noise, birdies, pre-echo, and sample-rate degradation relative to their knob settings.
Classic uses the neutral reference scaling for the individual artifact controls.
BadStream pushes noise, smear, pre-echo, and high-frequency degradation further.
Broken uses the strongest character scaling for unstable and damaged-stream results.
Dry/Wet crossfades between the original input and the complete processed signal.