2399 triple splashback delay

lookmumnocomputer · 2020-05-14T11:24:36.757Z

2399 image 82000×253 73.1 KB

Link to the information page :- https://www.lookmumnocomputer.com/projects#/2399-triple-splashback

BOM :- https://www.lookmumnocomputer.com/s/BILL-OF-MATERIALS.zip

im working on the page over the next. couple of days. a video will be going up about this project also, and hopefully a functioning stripboard layout!

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klausklaerwerk · 2020-05-14T11:45:04.330Z

fuuuuuukk yeah! really looking forward to this!

AstralDad · 2020-05-14T12:07:02.700Z

Absolutely gorgeous!!!

ChristianBloch · 2020-05-14T12:23:46.083Z

Damn, that’s nice!!!

analogoutput · 2020-05-14T13:13:14.554Z

I understand RV1, RV5, and RV9 control how much of the delayed signal is mixed with the input to be fed back to the PT2399. RV4, RV6, and RV8 control the delay time. RV2 attenuates the CV.

What do RV3, RV6, and RV11 do?

lookmumnocomputer · 2020-05-14T13:28:39.886Z

so how the feedback and mix works in the pt2399 echo circuit is a case of getting the right level. in essence the feedback is more of a fine tune of the level. RV3,RV6,RV11 completely zeroed means the feedback amount of the delay with the mix from half way to max is relatively low in comparison. when you turn up feedback you go into territories where your straddling between minimal echo and self oscillation.

the mix isn’t a true mix and the feedback isn’t a true feedback, the feedback on zero stops the circuit going to super delay town and feedback extremes.

http://www.princeton.com.tw/Portals/0/Product/PT2399_1.pdf

if you check the data sheet, its how they have it setup, and I felt no need to change it as its a delay type and topology I have worked with for many years, a lot of pedals and stuff use this method with singular pt2399’s so its just building on it and just looking under more rocks in the stream of lofi delay forest.

when your fiddling with them you’ll see why they are both needed.

analogoutput · 2020-05-14T13:37:20.281Z

The PT2399 datasheet’s pretty minimal, there’s more detail here:
https://www.electrosmash.com/pt2399-analysis

lookmumnocomputer · 2020-05-14T13:45:27.847Z

yeah of course! that page helped me with a weird power problem.

lookmumnocomputer · 2020-05-14T16:11:18.018Z

also just a heads up! this is the first module I think is worth making cross format because of its funky sound. so im putting together a pcb that is small enough to fit behind all modules, however it will be panel wiring!

Caustic · 2020-05-14T16:15:41.456Z

Hey @lookmumnocomputer, looks like these components are pretty easy to source!

Can you confirm if this is the right IC: