Search found 65 matches

by igorp
Sun Oct 10, 2021 2:01 pm
Forum: Algorithm development
Topic: Anyone interested in Pitch Detection?
Replies: 9
Views: 9558

Re: Anyone interested in Pitch Detection?

I did couple of mono synths several years ago. Main idea was to calculate input frequency and translate it to VCO "input voltage" , like modular synthesis. So , several "compressors"/normalizers were made and Shmidt triggers too. With good basses it has good result. I've test it ...
by igorp
Sat Jan 18, 2020 10:44 am
Forum: Algorithm development
Topic: Reading programs using the dev board
Replies: 2
Views: 6043

Re: Reading programs using the dev board

you can read ROM memory, when, decompile binaries to source
by igorp
Sat Jan 18, 2020 10:40 am
Forum: FV-1 software questions
Topic: Reverse delay?
Replies: 47
Views: 92995

Re: Reverse delay?

I hvae only one idea -reset pointer(s) after firt tap of springs or use led indicator to show begin of tact to muscian
by igorp
Mon Dec 16, 2019 2:20 am
Forum: FV-1 hardware questions
Topic: Fv-1 preamp Multi effect
Replies: 1
Views: 4310

Re: Fv-1 preamp Multi effect

You can make short FIR on FV-1 and make overdrive in manner of screamer , but other modern dsp could make it easier (but have other problems and limitations)
by igorp
Fri Oct 18, 2019 4:20 pm
Forum: Algorithm development
Topic: Delay Access and Modulated Delays
Replies: 5
Views: 7881

Re: Delay Access and Modulated Delays

Are you trying to make delay and chorus in same , maximum RAM buffer?
I see no MEM directives and separate buffers for delay and chorus
by igorp
Fri Oct 18, 2019 4:12 pm
Forum: FV-1 software questions
Topic: Reverse delay?
Replies: 47
Views: 92995

Re: Reverse delay?

I am trying to learn git , so you can download reverse delay patch from my github https://github.com/igorpie/Spin-FV-1
most comments translated to english , new added
by igorp
Sat Sep 14, 2019 3:08 pm
Forum: FV-1 software questions
Topic: Waveform starting point when changing patches/engaging effect
Replies: 6
Views: 6068

Re: Waveform starting point when changing patches/engaging effect

Hm... It's a good way to get sine LFO off battling LFO''s. only 8 lines and range wider than 20Hz
by igorp
Sun Sep 08, 2019 6:28 am
Forum: FV-1 software questions
Topic: Waveform starting point when changing patches/engaging effect
Replies: 6
Views: 6068

Re: Waveform starting point when changing patches/engaging effect

What is about JAM instruction? restart LFO and restart led in MCU
by igorp
Sun Sep 08, 2019 6:23 am
Forum: FV-1 hardware questions
Topic: Delay tails and 4049 clock
Replies: 4
Views: 5958

Re: Delay tails and 4049 clock

1. disconnect only input then pedal off. output is always connected
2. pin 10 = oscillator input , pin 9 = not connected.
by igorp
Mon Jun 17, 2019 1:25 am
Forum: FV-1 software questions
Topic: Can a triangle LFO be used in chorus?
Replies: 8
Views: 7907

Re: Can a triangle LFO be used in chorus?

you need one buffer for servo and two triangle LFOs with shifted 180 degrees phase

so, starting coefficient or RRR1 must be 0, for RRR2 - 0.25
by igorp
Tue May 14, 2019 10:15 am
Forum: FV-1 hardware questions
Topic: Application Note AN-0001 conflict
Replies: 2
Views: 4367

Re: Application Note AN-0001 conflict

this was a pot controlled LFO example, how to change LFO rate to desired values by potentiometer
by igorp
Tue May 07, 2019 2:53 pm
Forum: Algorithm development
Topic: log/exp exact coefficients
Replies: 7
Views: 9159

Re: log/exp exact coefficients

now understood about xor, thanks.
by igorp
Thu Apr 25, 2019 2:44 am
Forum: Algorithm development
Topic: log/exp exact coefficients
Replies: 7
Views: 9159

Re: log/exp exact coefficients

i don't fully analize your example, but POT is 9 bits, so last 14 bits are zeroes, and you get any low bits only because of 1st order LPF. Another thing is , potetentiometer will have zipper noise because of scratches. Simple LPF will not resolve scratching 100% correctly. One else: you multiply 15 ...
by igorp
Thu Apr 18, 2019 4:36 am
Forum: Algorithm development
Topic: Reducing the tremolo artefact from pitch shifting
Replies: 9
Views: 7415

Re: Reducing the tremolo artefact from pitch shifting

you may simply smooth signal by resonant filter and reverb after octaver and compress signal before octaver.
with custom octaver with 256 words cross-fade window, I think, it can give significant result.
by igorp
Sun Apr 07, 2019 9:44 am
Forum: Algorithm development
Topic: Reducing the tremolo artefact from pitch shifting
Replies: 9
Views: 7415

Re: Reducing the tremolo artefact from pitch shifting

audio is logarithmic, so it need to square x-fade coefficients to make volume more natural.

wrap, as far as i understand, gets obertones or harmonics , but you need whole tone.

And only one way - make transpose function yourself, with x-fades, filters, etc