2xPT2399 Delay Schematic

[MetalGuy]

Hello,

I just noticed this interesting delay schematic based on two PT2399 chips:

http://yerasov.ru/PDF/DM-5.pdf

[soggybag]

That's a great idea. It might be interesting to arrange them in parallel. I wonder what this sounds like?

[Brian Marshall]

That's a great idea. It might be interesting to arrange them in parallel. I wonder what this sounds like?

In the last few weeks ive been playing around with the 2399 quite a bit.  I've set up two on a breadboard, and have a similar set up for voltage control to this schematic (well, im using bipolars anyways)

Parallel is pretty interesting, and you can even get the two chips to "flange" a little bit.

The biggest problem is current consumption.  Even one 2399 will suck through a battery in less than an hour or so... Two pretty much render battery operation useless.

[MetalGuy]

The biggest problem is current consumption.  Even one 2399 will suck through a battery in less than an hour or so... Two pretty much render battery operation useless.

I don't know for you guys  but I never use batteries on any pedals which that's why there's no "current problem" for me.
This pedal claims to achieve 640ms of delay - don't you think it should be capable of more?

[Mark Hammer]

640msec is about right for  pair of 2399s.  If you want more delay time, you'll need to use a PT2395 or HT8955 with external RAM.

[alex frias]

I see a lot of possibilities...
Parallel or series processing, adding an LFO, possibly a inverted phase one.
Equal or diferent parameter values.
In parallel, using stereo outputs for each delay line, we may even crossfeedback the PT's, creating imaginative stereo patterns.