[sdiy] TR808 accent question

[Dino Leone]

Thanks to everybody who replied!  I'll give it a try with individual  
accent lines.

Best,
Dino




On Jun 13, 2008, at 1:33 PM, Seb Francis wrote:

> Yes.
>
> But no reason from an analog point of view not to have individual  
> accents.  If I remember the circuit correctly you have a couple of  
> transistor on the trigger input of each sound and they kind of AND  
> together the individual trigger signal and the accent/timing  
> signal.  So the actual timing, pulse width and accent amount is set  
> by the accent/timing signal (common for all voices) and the  
> individual trigger signal comes on for an imprecise period around  
> when the drum needs to trigger.
>
> If you are triggering each drum voice from MIDI you need to send a  
> pulse of the right length (1ms) with voltage between 4V and 14V.   
> Feed this signal instead of the accent/timing signal and leave the  
> individual trigger signal always on.  You can probably even dispense  
> with 1 or 2 of the transistors on the trigger input of each voice.
>
> Seb