Spin Semiconductor

If you connect 3.3V to pin2 on the switch, have pull down resistors on S0 and S1 and connect both of these to pins 1 and 3 on your switch.

I believe MacroMachines is referring to the function:

f = 2sin(pi*Fc/Fs)

This is what you use to find the coefficient for the corner frequency (wf).

The coefficient for the lpf can be changed to change the attack/release time. Using the formula: AT = 1-e^(-2.2T/tat) where AT = filter coefficient T = 1/32768 tat = desired attack time in sec So a coefficient of 0.001 will yield an attack time of around 65ms. A lot of good info on dynamic processin...

I was curious if anyone knows of a way to clear an entire memory block in one cycle.

You can get a little cleaner octave up by squaring your input as opposed to taking the absolute value. You will need to add some gain before squaring. rdax dout,1 ;get dout sof -2,0 ;increase gain sof -2,0 ; sof -2,0 ; sof -2,0 ; wrax oct,1 ;save to oct mulx oct ;square oct

For those interested in using a sin for the LED rate indicator you will have to convert the "taptempo" register's values from a time to a frequency which can be done using the log and exp functions. AN-0001 gives us the formula for finding the frequency coefficient for the wlds instruction...

In experimenting with this I have found that you can indeed have the full delay space reserved for the delay and use this same memory block for the pitch shift. So all you will need to do is setup the delay the same and use that memory block in the pitch shift algo. When calculating the pitch shift ...

Instead of reading from the address pointer I would just read from the end of pdel rdax adcl,0.5 rdax adcr,0.5 ;get inputs mulx gain ;give greater gain to short RT wra pdel,0 ;read predelay and write initial response delay: ;rmpa 1 ;instead of reading from address pointer rda pdel#,1 ;read from the ...

I ran into this issue a few months back. Unfortuantely you will need 513 spaces of memory for the pitch shifting so your delay will be limited to around 984ms unless you use a slower crystal. Are you wanting to delay the pitch shift, pitch shift the delay, or run the pitch shift in parallel with the...

Let me rephrase the question like this:

What is the correlation to sin_range and the amount of pitch shift that takes place? I am wanting to implement a specific range of detuning. AN-0001 does not seem to cover this.

Is there a formula for calculating the frequency shift per delay sample when using the CHO command for chorus/vibrato?

Just to further my understanding, the FV-1 utilizes delta-sigma ADC architecture?

I have been trying to rework slacker's tap tempo code to use one of the ADC inputs for the switch. I have been able to get it it work-ish, for the most part anyway. I feel that if I had more info on how the ADC is read vs the POT inputs then things would be much easier. I see in the manual that the ...

I was wondering if there is a way to quantize pots to exact intervals, say 30 or 90 possibilities. I see in the knowledge base that masking a pot to 5bits will give you 32 steps but can this be tailored even more?