Hello,
I just noticed this interesting delay schematic based on two PT2399 chips:
http://yerasov.ru/PDF/DM-5.pdf
That's a great idea. It might be interesting to arrange them in parallel. I wonder what this sounds like?
Quote from: soggybag on October 21, 2007, 07:21:29 PM
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.
QuoteThe 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?
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.
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.