Search found 65 matches

by igorp
Sun Apr 07, 2019 9:41 am
Forum: Algorithm development
Topic: Triangle wave from sin LFO
Replies: 8
Views: 10163

Re: Triangle wave from sin LFO

and this is my typical triangle LFO snippet. 6 lines, but you can use them as much LFOs as you need and use sine LFO for tail smearing and tempo may be from 1/32Hz to 16kHz ldax rate ; 0x100, for example rdax RRR3 , 1 ; drrr3+ rrr3 - counter and 0x3fFFff ; 0 .. 0.5 wrax RRR3 , 1 ; Sawtooth 0..0.5 so...
by igorp
Sun Apr 07, 2019 4:18 am
Forum: Algorithm development
Topic: Reducing the tremolo artefact from pitch shifting
Replies: 9
Views: 7495

Re: Reducing the tremolo artefact from pitch shifting

You may use compressor/normalizer to make audio more flat and write your own transposition snippet with custom fadein-fadeout on buffer boundaries. I tried once, 256 samples for both was enough. FV-1 uses fixed x-fade coefficients, but, AL3201 (afair) had about 8 types with different angles. If your...
by igorp
Sun Apr 07, 2019 4:04 am
Forum: Algorithm development
Topic: Triangle wave from sin LFO
Replies: 8
Views: 10163

Re: Triangle wave from sin LFO

Nice snippet thank you!
by igorp
Fri Mar 22, 2019 4:45 am
Forum: FV-1 software questions
Topic: SPN file to Arduino
Replies: 6
Views: 9922

Re: SPN file to Arduino

download spinasm and compile
by igorp
Fri Mar 22, 2019 4:43 am
Forum: FV-1 hardware questions
Topic: FV-1 harsh ticking sound
Replies: 8
Views: 7007

Re: FV-1 harsh ticking sound

Oh, man, never buy fv-1 on aliexpress, they all defective.

Small bear electronics , banzai , etc , sell original ones for personal use
by igorp
Fri Feb 22, 2019 3:27 am
Forum: FV-1 software questions
Topic: Anyone succesfully programming the FV-1 on a mac?
Replies: 11
Views: 9402

Re: Anyone succesfully programming the FV-1 on a mac?

1. You right. Shared folder between OS and VM is just for it. 2. You can use USB port pass-through in virtual box and pass it to VM directly to upload project to devboard. 1. I never had original devboard. USB port pass worked OK, my ST-Link (I use MCU memory as EEPROM) and USB-UART modules worked f...
by igorp
Tue Feb 19, 2019 1:49 pm
Forum: FV-1 software questions
Topic: Anyone succesfully programming the FV-1 on a mac?
Replies: 11
Views: 9402

Re: Anyone succesfully programming the FV-1 on a mac?

Not at all, greenstomp XP2 or XP3 would be enough. And spinasm with free programs , knowledge base and this forum. I mostly use FAR Manager as editor , it's more comfy to me, and spinasm for compile. For MacOS , imho is good way to use your favourite text editor (edit) + python compiler (compile) + ...
by igorp
Sat Feb 16, 2019 9:32 am
Forum: FV-1 software questions
Topic: Anyone succesfully programming the FV-1 on a mac?
Replies: 11
Views: 9402

Re: Anyone succesfully programming the FV-1 on a mac?

I am working on Mac with VirtualBoxVM , with Windows XP running (1Gb of RAM with no swap). On the forum was announce about alternate compilers, NDF wrote spin fv-1 compiler on python , but I never tryed it, because satisfied with spinasm, it hotkeys , etc. But for linux or mac, or alternative platfo...
by igorp
Thu Jan 31, 2019 6:37 am
Forum: FV-1 software questions
Topic: Can a triangle LFO be used in chorus?
Replies: 8
Views: 7973

Re: Can a triangle LFO be used in chorus?

Servo uses RMP to get precise data addressed by any address source. Triangle DDS can be used too. You may use RMP1 if RMP0 is used. Or write own DDS and do not use hardware RMPs. DDS LFO example is below. Pot_char - your rate pot, RRR = DDS register. ; some Astronaut-3 snippets or 0x600 ; [Scale] По...
by igorp
Wed Jan 30, 2019 2:37 pm
Forum: FV-1 hardware questions
Topic: Best gain for input buffer
Replies: 5
Views: 6245

Re: Best gain for input buffer

we tested several power schemes, they did't slow down noise significantly. And tried 4-th order LPF with 10kHz cut-off to output of the FV-1 to reduce noise. It's not helped too. For all in one chip without balanced input ADC FV-1 still sounds cool and it's still a classic , i think, we've never get...
by igorp
Tue Jan 29, 2019 11:55 am
Forum: FV-1 hardware questions
Topic: Best gain for input buffer
Replies: 5
Views: 6245

Re: Best gain for input buffer

x4 gain will add +2 significant bits and may cause troubles with active pickups and strong attack.
You also may try kind of "Dolby" method, HPF before ADC and LPF after DAC (as on Small Clone done) and divide digital and analog power/grounds.
Sample rate of 48kHz may reduce some noise too.
by igorp
Mon Jan 28, 2019 7:08 am
Forum: FV-1 hardware questions
Topic: SMD Crystal oscillator
Replies: 6
Views: 5106

Re: SMD Crystal oscillator

we tried several, they had problems with reliability and washing in ultrasonic bath, so we are using micro controller clock instead of crystals.
The bonus is variable sample rate. 48kHz, 22 kHz, etc
by igorp
Mon Jan 28, 2019 7:05 am
Forum: FV-1 hardware questions
Topic: New to forum, and two questions
Replies: 5
Views: 4388

Re: New to forum, and two questions

yes, usual binary code.
by igorp
Sun Jan 27, 2019 10:26 am
Forum: FV-1 hardware questions
Topic: New to forum, and two questions
Replies: 5
Views: 4388

Re: New to forum, and two questions

s0 = lowest bit

so , patch #1 = s0=1, s1=0, s2=0