Spin Semiconductor

You can detect changes in the delay time pot and use this to fade up/down two separate pointers. You have to have some sort of limit/hysteresis so that you are not changing the tap point of the delay while it is faded up. I don't have any examples, it's pretty complicated, but I have seen it done. DL

I haven't made one.

Well that's certainly refreshing to hear! I've never tried it myself. I presume you implemented the hardware following Slacker's Babelfish I think it was?

Hi Frank, My code is actually working. I think there's probably something wrong with the SpinCAD simulation of either log or exp. I went back to the actual board. I dropped in two oscillators panned L/R that I programmed for about 4000 Hz. Then I added the ratio block, set ratio to 5, and sent the o...

>>> LOG2(0.3333) is -1.584964 -1.584964 * -1.0 = 1.584964 1.584964 -0.0990601562950722 = 1.485904 EXP2(1.485904) = 2.800926 2.800926 > 1.0 so saturate to 1.0 >>> Hi Frank, I think what is missing here is the /16 step. 1.584964/16 = 0.09906025. That's pretty close to the 0.09906015-etc. and may be do...

Thanks Frank, it turns out that my example is really exactly the same as the one in the knowledge base. And while the description there is correct, it is very dense (for example some of it is explaining intermediate results of the LOG instruction, which is not obvious at first). I'd better write dow...

I've always been really bad at the log/exp functions. Here's what I'm trying to do. I want a control that operates over a given range of the pot, but does not go to zero. For example. if the ratio is 2, then pot 0->1 is output 0.5->1.0. For a ratio of ten, Pot 0->1 maps to 0.1->1.0. Now I also want ...

I shut down the Patreon site.

Article is now here.

https://holy-city-audio.gitbook.io/spin ... k-detector

I had a Patreon thing going for awhile but discovered it's really bad for documenting software. I moved everything over to Gitbook which is really good for documenting software. I haven't put descriptions in for everything, and who knows, I may never get around to doing it, but here it is anyway. ht...

Makes sense!

Thx.

DL

Thanks Frank! Another question on MAXX:

I get why you'd use C = 1.0 or 0 < C < 1.0 but I'm having a hard time imagining the application for C < 0 or C > 1.0 UNLESS it was simply used for some kind of comparison without subsequently writing the value back to the same register.

DL

I've been messing around with the MAXX instruction recently, doing a peak detector for a customer's auto-wah. I finally realized that this instruction includes a low pass filter in it. Many of the discussions about the coefficient simply say "long" or "short" and while it's most ...

Well, I was trying to let the suspense build a bit so people would come pay to find out (as there is a more in depth analysis at https://www.patreon.com/posts/spin-auto-wah-i-69482282). But here's a summary of what I came up with. When the Sensitivity pot is at zero, the output is 1. When the Sensit...

This code comes from the ga_demo_wah code. I'm just going to go a step at a time because this is seriously strange stuff and I believe it exposes but does not really explain some very powerful strategies that might come in handy from time to time. Here's the first bit. absa rdfx avg, 0.01 wrax avg, ...

Thanks Frank, sorry if I was grumpy. As I haven't been doing this day-in day-out for a number of years I am indeed rusty on it. :cry: :( As a contribution to the effort rather than just complaining I offer this handy link where people, upon encountering RDFX REG0, 0.01 WRAX REG0, 1.0 you can just pl...