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Trigger Outs - 4ms


oozitron

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I am building a tr-606 sound module that requires 4ms triggers, but of course I want to trigger it from my MIDIBox (V4) sequencer.

Is there some way to adjust the trigger length of the DOUT via configuration?

Or has anyone built a circuit to extend the triggers to 4ms (with CD4016 chips) that they could share?

thanks!
Andrew

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I found a "pulse stretcher" circuit on the MFOS page, but I don't know what res/cap values would be correct and I don't have a scope :-(

Any suggestions on the value for those two components so a 4ms trigger would result?

Andrew

pulse-stretch.png

Edited by oozitron
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The clock pulse can be varied in ms steps, but the triggers are either gate or 1ms. Does it work to use "gates" instead? Often a trigger input will react on the rising edge. If it's the falling edge though, then a gate wouldn't help.

I had a quick look through the code, but I couldn't find an obvious solution. Clocks are different to triggers, as the timing is always consistent relative to the master tempo. 

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Same!
It seems the DOUT triggers can be enabled in the hardware config file by "DOUT_1MS_TRIGGER" then the variable seq_hwcfg_dout_gate_1ms is set from this text command but I don't find where this variable is used, so I can tell how this is used, even less how to change its length.
I think we have to call @TK. for that, he's the only one who can explain how and what is doable.

Best
Bruno

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