[sdiy] Kick Drum schematics

[DJ Marmalade]

Agreed, this, imho, is one of the key characteristics of the 909 sound.  I
have a nm 909 kick simulator which ties sync to the gate pulse and it really
makes a difference for consistency.  You also need several fast and subtle
modulations.  The 909 circuit has a few good ideas and it's a good place to
start.

Daryl



> >of course, you could just hook up that modular with a self oscillating
> filter and an envelope, and add other elements to taste...
>
> Unfortunately, this does not work that well for kick drums. The
> frequency has to be quite low, and therfore it is difficult to ensure
> that your oscillating filter's output is starting at the right point.
> What you end up with is odd clicks and soft attacks sort at random in
> your drum pattern. You need to do what the TR909 did and reset the VCO
> every trigger. This way you can be sure your VCO will start at the same
> point every trigger.