Spin Semiconductor

I haven't had the chance to run it but a quick read seems like the logic is sound, a couple things to try: 1. Give the input signal lots of gain, we want to try to "square it up" prior to using it. I see what you're saying, and you're right, but low input gain wouldn't make it not work, I...

So here's what I came up with: equ old_sig reg0 equ counter reg1 equ square reg2 skp run, doit clr rdax pot0,1 wrax counter,0 ;load counter with a number. Number is varied by pot0 sof 0,.5 wrax square,0 ;create square wave doit: ldax old_sig ; read in saved value ldax adcr ; read in ADC left, also p...

I'm trying to do something kind of like the old analog octave down pedals that generate a square wave, except going several (say 4) octaves down. These, I think, use flip flop circuits to change sign every time a rising edge happens at their input, generating a square wave an octave lower than the i...

I see this a couple of times: wrax reg0,0 wra del1, 0.0 ;write to next delay This is bad for a couple of reasons. One, you have reg0 equated to "temp" but then you're writing something else to it that's unrelated. It might be a problem or might not, but it's a bad habit IMO. I wouldn't eve...

When it doesn't work right, it's easiest to diagnose when you tell us what it's doing, and what it's not doing. So what works; doesn't?

Your line

wldr RMP0, 16384,4096 ;octave up delay

needs to go inside the skp run, loop routine, which currently doesn't have anything inside it.

Hmm, so how would that differ from multiplying a signal with itself? Is there some sort of time component?

How do you plan to approach it? I couldn't think of any way to even conceptualize the code for this. I used to have a lot of fun on computer recording systems, convolving a piano with a cymbal, for example. The convolution concept can be extended to a lot of interesting things beyond reverb. For som...

There is a frequency shifter code here which should do what you want:

http://www.spinsemi.com/knowledge_base/Pitch_Sft.html

Ha, wow this thing is fun. I popped a 4-pole filter before the delay and another one after it, and added feedback to get some repeats happening. The unfiltered sounds are nasty in a cool way, I think. To implement: -variable delay time -stomp switch that starts recording, then on the second tap, it ...

Wow, really cool Don, thanks. I wasn't expecting you to go to quite that extent of coding it up for me. I'll play around with it and see how far I can stretch the idea.

Hmm, but since the FV-1 doesn't have IF or THEN, I'd have to do something like Frank talked about here . Could this be stretched indefinitely? I play bass, and it would be neat to be able to loop bass notes. The highest fundamental of the lowest octave of standard bass tuning only goes up to 82hz. S...

Here is a way to get a two second delay without modifying the hardware: Use a variable to toggle between "even" and "odd" passes. (Start with the variable set to 1, negate it each pass, and test to pos or neg.) On "even" passes, put your sample in the head end of the d...

That's interesting Don, but I don't exactly understand how it would be used. What would the switches control?

Hmm, if I get a chance I'll try the code above and see what I can make of it. As I said, I hadn't ever tried that concept, but I think it should work if we can get the code together. One thing you might try is amplifying your instrument, either in analog before the FV-1, or by putting several "...