Spin Semiconductor

I am trying to create a sample and hold type of effect using Frank's LFSR code and DigitalLarry's SVF code. I have the output of the LFSR being used as a crossfade coefficient between the lowpass and highpass outputs of the SVR. I can hear that it wants to work but there is a lot of distortion takin...

I will definitely keep that in mind. Thank you for all of your help!

And to take this further, if using the equations found here for state variable filter : rdax adcl,.5 ;read left*.5 into ACC rdax adcr,.5 ;read right*.5 into ACC wrax mono,1 ;set mono input, keep in ACC rdax lowpass,-1 ;q * input - LPF rdax bndpass,-1 ;q * input - LPF + (-q * BPF) = wrax hipass,0.122...

Thank you for the code, Larry.

Just to make sure I'm understanding fully, the coeff for fZ that you are using in your posted code then would be centered around 707Hz?

sin(2*PI*fZ/Fs)

sin(2*PI*707/32768) = .13515

Hey Larry, I have been in the process of developing a very similar type of tremolo based on the early brown face fenders. I have been trying to accomplish this by splitting the input and sending them through a single LPF and HPF and crossfading them with the sin LFO. It kind of works but it definite...

RDFXcoeff = 1 - exp(-2*pi * Freq / 32768)

This equation is working much better! Thanks gfisys!

So from what I gather then, for a hpf all I would need is:

ldax adcl
rdfx hpf,0.00125
wrhx hpf,-1
wrax dacl,0


But whenever I try this code it sure doesn't sound like a HPF.

I have been spending the last few days trying to understand how to do simple low pass and high pass filters. So far, I believe I understand how the low pass filtering is accomplished but I am baffled as to how to create a HPF. Based on this post http://www.spinsemi.com/forum/viewtopic.php?t=481&...

Hello everyone. I have been using this forum for a while now and have learned a great deal from everyone here. This is my first post and I hope that you guys can point me in the right direction. I am currently working on a tremolo with reverb. Something in the vain of what you would find on say a Fe...