Spin Semiconductor

Thanks, Frank, for the octave up and down code. It is very cool to have a POG-like effect for the FV-1. I have been thinking about ways to address the artifacts that necessarily come with pitch transposition. I want to get yours and others comments on whether you think they are worth pursuing. The t...

The FV-1 has heavy (100ms) filtering on the pot inputs. See the "Pot Tracking Speed" post on this forum. I assume that this filtering is most digital. I would be a little worried that putting the PWM signal directly on the input might cause unexpected results if the PWM freq and the FV-1 A...

I think you are on the right track, with two exceptions: - You have a pure integrator followed by the sub-audio low-pass filter, which is also acting as a "leaky integrator". You only want one of these to convert the square into the triangle. I was just trying to make the point that a leak...

A square wave switches from a constant positive value to a constant negative value and back. If you integrate this, you get a signal that ramps positive, then ramps negative at the same rate. If the square wave amplitude is constant due to the clipping, the ramp rate (slope) will be constant. If the...

I haven't had a chance to do any real coding, but I have thought a lot about the "pitch metric" problem. I call it a pitch metric rather than true pitch detection because we need a relative measure of pitch from note to note or cord to cord, but trying to extract pitches from cords is too ...

Maybe I am not understanding your intent, but I am thinking it would be easier to do in the time domain on the FV-1. To do the sustain, you could set up two delay memories and toggle/pan between them, just like you would set up to do pitch shifting. You could switch from live to delay memory as the ...

I haven't tried to understand your specific project, but I have a general suggestion that has worked extremely well for me so far. My project uses sweepable 2nd order and 4th order SV filters. I use LTspice to simulate them in the analog domain, using generic op amp integrators. Then I code it direc...

Hey guys. I am new to the forum and just learning the chip. Very impressive! I procrastinated because it seemed too much like work, but it has been a blast. I am working on a multi-band distortion project. Thanks for the cube distortion code, since I need to do it for each band. I came up with a squ...