Alesis Andromeda A6 Tips And Tricks Manual page 28

Offset: set to bring out the bass best
Keytrack: 50 (select the parameter and hit the Inc/Dec keys simultaneously)
Set Filter 2 as follows:
Frequency: 0.0233
Res: 0.00
Env2: 51.00
Select Filter 2 Mod 1. Set Envelope 2 to modulate Resonance
and keep the Level the same.
Post Filter Mix settings:
Filter 1 LP: 100.00
Filter 2 LP: 100.00
Pre Filter: 100.00
Turn off Osc2 Sine on the Pre Filter paramter on the Post
Filter Mix section.
Set Envelope 2's Decay 1 Stage to a slope of Log 3.
Set Envelope 3's D1 Time to 4ms.
Set Envelope 3's D2 Time to 322ms.
Set Sustain to 000.
Set Keyboard Mode to Poly.
Readjust Filter 1's Offset parameter for the best bass.
Bring the Voice Mix Level up to maximum.
Yes, you're overloading the Post Filter Mixer but in
this case it's good.