Author Topic: Delay blend knob  (Read 1143 times)

Lastave

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Delay blend knob
« on: July 07, 2017, 01:17:13 PM »
Hello! I am trying to wire a pt2399 based delay with a blend that goes from all delay to dry and am having some trouble. Is this something that can be done with say some of the zero point delays. That's the schematic I am going off of and so far the delay is too quiet when mixed in. I would like to keep the op-amp in the design unlike the pitch pirate type delays.  Any help would be great. Thank you!

Lastave

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Re: Delay blend knob
« Reply #1 on: July 10, 2017, 12:57:33 PM »
I have tried adding a transistor buffer and still no luck. Not giving up. Thanks for looking.

mcasemo

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Re: Delay blend knob
« Reply #2 on: July 11, 2017, 02:07:42 PM »
**Edited**

So referencing the zero point micro II (2014) schematic you could remove the mix pot and just have that line go straight into C14.

Remove R4 which mixes the dry with wet on the output buffer.

Run a coupling cap (1u?) from pin 1 of IC1 to lug 1 of a B50K pot, this will be the blend Pot.  Lug 3 of this pot will get the signal after C4 (out).  Then the wiper of this pot, lug 2, is your new out.

I probably have this drawn out at home, but i think this would do it.

http://www.madbeanpedals.com/projects/ZeroPoint/ZeroPointMicro2.pdf

Lastave

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Re: Delay blend knob
« Reply #3 on: July 13, 2017, 01:44:50 PM »
Thanks! I'll give a go and let you know.

Lastave

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Re: Delay blend knob
« Reply #4 on: July 13, 2017, 02:17:10 PM »
Your solution worked great!
Thank you!

mcasemo

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Re: Delay blend knob
« Reply #5 on: July 13, 2017, 08:57:11 PM »
Awesome, glad it worked for you!