Spin Semiconductor

For now, I do things with spincad I want to make a plate-type reverb and an echoplex-type delay, "no analog" tape style I'm looking for. Those two things, using SpinCAD and wanting custom reverb/delays are basically mutually exclusive. Making a specific type of reverb requires more than a...

You can have more tan 8 but you need to disable one EEPROM so that one of the address pins is at +3.3V as the FV-1 reads the device where A2=A1=A0=0V After changing the A pin you need to make the FV-1 read in the program from the enabled EEPROM by changing the S pins to the new program. Of course if...

Sequential read

128 instruction/program * 4 bytes/instruction so 512 bytes per program

Programs are sequential in the EEPROM so program 0 is bytes 0 -511, program 1 512 - 1023, etc.

vasilius wrote: ↑Sun Jan 15, 2023 9:37 am XFADE also in area 0..1.0?

Yes

and k=0.0 compc = 1 - k = 1.0 always for all counts bcs ramps consists from whole digits No they do not, ramps have a fractional portion and that is the bits used for interpolation. The integer bits are added to the sample counter. then this code cho rda,RMP0,REG|COMPC,delayd cho rda,RMP0,0,delayd+...

Well, I think you do but as I said it has been a long time and I was always looking at it from the pitch shifting perspective. So I never cared what the ramp speed was, I cared about how much it added to/subtracted from the sample counter to change the pitch.

Just reads the EEPROM exactly as shown in a datasheet for the 24LC32A. Programs are in the EEPROM in order so program 0 starts at address 0 of the EEPROM.

The window is either behind the main window or is off screen. Depending on the version of Windows you can find the window, see: https://superuser.com/questions/676675/ ... pplication

The reason we allowed for C < 0 and C > 1.0 is simply because it was already defined for that range in the instruction field (note the other instructions in that group are all S1.14) and it was easier to allow it as well. Someone may some day discover a use for C in those ranges but honestly it was ...

RMS detector, you can adjust the LP coefficient used for averaging to control attack/decay time

The FXCore sample auto-wah code I did should be able to be used as a template for some FV-1 code. http://experimentalnoize.com/manuals/FX ... to_wah.fxc

The 512, 1024, 2048, 4096 amplitude coefficients make sense, but how does that amplitude map from the integer value in samples to a 0-1 floating point value in the accumulator? Looking for a precise way to scale this such that I have an exact 0-1 ramp wave value in the accumulator. Been so many yea...

While you can use CHO SOF with a sin it does not really return a cross fade value of much use. For a ramp it returns a cross fade relative to the ramp wrapping around from the end to the start of the delay block and sines do not do this. The value is derived from the ramp and shifted ramp so it will...

This is not so easy to answer, the ramps in FV-1 are generated based on delay length and pitch shift desired along with the sample rate. You can probably determine the frequency from coefficient if you consider that for a 1 octave up shift the coefficient is 16384 and to shift up an octave we would ...

Cross fade coefficients are only generated for the ramps not the sin LFOs so 'CHO SOF' is not really useful for sin LFOs. For an application like this I would look at FXCore, you could create the desired waveform in the program and use some of the more advanced addressing instructions to access the ...