Author Topic: ISO: time-controlled gate schematic?  (Read 458 times)

mdcmdcmdc

ISO: time-controlled gate schematic?
« on: February 02, 2022, 05:01:27 PM »
Hi folks,

I'd like to start messing about with adding a time-controlled gate to a PT2399 reverb/delay to hopefully achieve a sort of low-rent gated reverb effect. I'm slowly sifting through the copious threads on noise gates, but I haven't been able to find any suggestions on implementing a gate whose length/cutoff time is set externally rather than by input voltage etc.

There's an analog korg gated spring unit, the GR-1, which seems like a promising start but I haven't been able to find a schematic.

Thanks in advance for any direction - I assume this has been discussed in detail... somewhere? I just can't seem to dredge it up on a forum search, unfortunately!

MikeA

Re: ISO: time-controlled gate schematic?
« Reply #1 on: February 02, 2022, 06:15:06 PM »
Here's the owner's manual followed by the service manual which includes schematics:  https://cdn.korg.com/us/support/download/files/d063d020a50fbbf3e72b1572ed018057.pdf
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mdcmdcmdc

Re: ISO: time-controlled gate schematic?
« Reply #3 on: February 05, 2022, 09:15:59 AM »

niektb

Re: ISO: time-controlled gate schematic?
« Reply #4 on: February 05, 2022, 11:19:23 AM »
can't you just use a microcontroller that drives a JFET switch? :)