flintan

Overdive circuit in parallel (wet/dry)
« on: November 10, 2020, 02:41:47 PM »
I plan to build a simple overdrive circuit with a buffered wet/dry pot at the output. I'm thinking opamp based with diodes in the feedback similar to the tube screamer and others. However these circuits need some filtering to sound good which induce phase shifts that may be problematic with the parallel wet/dry idea.

One idea might be to compensate the phase shift with some kind of all-pass circuit. Ideally I would like to have a tone control of the overdriven signal but this would also mean the phase will shift differently..

Another idea is to build an overdrive preamp with tubes instead and skip the wet/dry thing.

Any thoughts?


JohnRoberts

Re: Overdive circuit in parallel (wet/dry)
« Reply #1 on: November 10, 2020, 03:05:54 PM »
I have found when messing with efx, you need to speculate less and melt more solder...

Some circuits that I speculated about did not sound remotely like I expected on the bench.

JR
It's nice to be nice....

abbey road d enfer

Re: Overdive circuit in parallel (wet/dry)
« Reply #2 on: November 10, 2020, 04:56:52 PM »
I plan to build a simple overdrive circuit with a buffered wet/dry pot at the output. I'm thinking opamp based with diodes in the feedback similar to the tube screamer and others. However these circuits need some filtering to sound good which induce phase shifts that may be problematic with the parallel wet/dry idea.
Most EQ's are minimum-phase, and introduce significantly less than 90° phase-shift. As a result the input and output combine positively because they are in the same quadrant. No weird effect.

Quote
Any thoughts?
Don't overthink.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Re: Overdive circuit in parallel (wet/dry) New
« Reply #3 on: November 10, 2020, 05:48:39 PM »
I have found when messing with efx, you need to speculate less and melt more solder...

JR

So true and a nice statement for a forum signature, too.  :D
« Last Edit: November 11, 2020, 01:27:20 AM by rock soderstrom »

flintan

Re: Overdive circuit in parallel (wet/dry)
« Reply #4 on: November 10, 2020, 07:00:12 PM »
Thanks! Good points, I’ll just start to experiment and see how it sounds.


 

Related Topics

  Subject / Started by Replies Last post
10 Replies
5779 Views
Last post June 15, 2005, 04:00:30 AM
by gyraf
17 Replies
7865 Views
Last post December 12, 2006, 03:42:54 PM
by mikep
12 Replies
5289 Views
Last post November 25, 2009, 07:33:45 PM
by Sleeper
71 Replies
14796 Views
Last post January 26, 2021, 06:29:19 AM
by livingnote