The all notes off button is used to stop notes that get stuck once in a while. It is also triggered by the backspace key. For each voice you can select 1 of the 365 patches that are available from the Beatnik voicebank. Volume adjusts the soundlevel of a voice. Pan adjusts the left-right balance of a voice.
Modulation gives a voice more vibrato.
Reverb gives a voice more reflection. The effect depends on the environment chosen with reverbtype. Chorus makes a voice sound like there are more of them together. Mute selects if notes will be sent to a voice. Solo makes a voice play alone.