Analogue-sequencer

> And will the triggers be velocity sensitive?

Each 'trigger' is an accent CV and gate pair.
Each MIDI note maps to a pair, with velocity driving the accent CV and
note-on triggering the gate pulse.
I use a mix of 808 and 909 sounds. The 808 uses CVs in the range of 5 to 14
V or so, and the 909 uses 0 to 5 V.
I have the gain set to give maximum range for the CVs (as close to the
supply voltage as the op-amps will go), and scale the velocity values down
for the 5 V outputs.
The DAC is 12 bit, so can be scaled down without losing any resolution.
The accent and trigger outputs can be combined into a single, variable
voltage pulse using the two-transistor circuit you'll see all over the
schematics for the 808 and 606.

Cheers,
Colin