Search found 22 matches

by mark2
Wed Mar 30, 2022 1:37 pm
Forum: Algorithm development
Topic: Wrong instruction (typo) in the quick setup doc?
Replies: 3
Views: 6020

Re: Wrong instruction (typo) in the quick setup doc?

Thank you. I've got it now. Sorry for the false start; I was too quick to post the thought/question and should have spent more time on it.
by mark2
Thu Mar 24, 2022 11:26 am
Forum: Algorithm development
Topic: Wrong instruction (typo) in the quick setup doc?
Replies: 3
Views: 6020

Re: Wrong instruction (typo) in the quick setup doc?

Actually I don't think that makes sense either. I'll spend some more time trying to figure this one out.
by mark2
Thu Mar 24, 2022 10:48 am
Forum: Algorithm development
Topic: Wrong instruction (typo) in the quick setup doc?
Replies: 3
Views: 6020

Wrong instruction (typo) in the quick setup doc?

In this section: http://www.spinsemi.com/knowledge_base/pgm_quick.html#Pot_inputs It reads RDAX POT0,0.01 ;read POT0 times a small number RDAX pot0fil,0.99 ;read filter register times 1-previous coefficient WRAX pot0fil,0 ;filtered pot value ready for use in register labeled pot0fil But should the s...
by mark2
Mon Mar 07, 2022 9:26 pm
Forum: FV-1 software questions
Topic: Simulating reverse log pot
Replies: 4
Views: 5718

Re: Simulating reverse log pot

In case anyone comes across this with a similar question, or in case I did something stupid that should be pointed out, here's where am at now. I haven't tested it extensively but at first blush it seems okay. sof 0, 0.999 rdax pot2, -1.0 ; (1-POT2) wrax tmp, 1 mulx tmp ; (1-POT2)^2 mulx tmp ; (1-PO...
by mark2
Mon Mar 07, 2022 2:59 pm
Forum: FV-1 software questions
Topic: Simulating reverse log pot
Replies: 4
Views: 5718

Re: Simulating reverse log pot

While this is targeted at FXCore it has POT curves towards the back and the equations for the different curves so this may help: https://www.experimentalnoize.com/manuals/FXCore/app_notes/an-7.pdf Brilliant, thank you. I'll give that a go instead. Disregard my last post about the linear skipping un...
by mark2
Mon Mar 07, 2022 2:57 pm
Forum: FV-1 software questions
Topic: Simulating reverse log pot
Replies: 4
Views: 5718

Re: Simulating reverse log pot

A little unconventional, but maybe another idea is to use SKP conditionals to divide it into 3 sections. Something along these lines rdax pot0, 1 skp zro, ENDPOT0 ; retain zero sof 1, -0.33 ; bottom third of travel gets 3/4 of values skp neg, QUICKTRAVEL SLOWTRAVEL: ; TODO: scale/offset 0 to 0.33 to...
by mark2
Mon Mar 07, 2022 2:30 pm
Forum: FV-1 software questions
Topic: Simulating reverse log pot
Replies: 4
Views: 5718

Simulating reverse log pot

I'm trying to make my pot most responsive at the very top, i.e. most pot travel gives values between 0.75 to 1. So my first (admittedly naive) assumption is to do the nth root. e.g. POT1 raised to (1/4). Is this possible or should I be trying to approximate it with some form of EXP(LOG(X)) ? Or othe...
by mark2
Sat Mar 05, 2022 12:45 pm
Forum: FV-1 software questions
Topic: Metallic clicking sound with reverb (SpinCAD Reverb_Hall)
Replies: 2
Views: 8088

Re: Metallic clicking sound with reverb (SpinCAD Reverb_Hall)

This seems to certainly be a culprit. I was never able to fully reproduce the problem (that recording was from somebody else) without increasing the gain for testing purposes, but when I did it sounded very similar. To be safe I'm dialing it down now, then will try amplifying it on the other side of...
by mark2
Tue Feb 15, 2022 8:55 am
Forum: FV-1 software questions
Topic: Range of DACL/DACR? LED rate indicator
Replies: 3
Views: 7185

Re: Range of DACL/DACR? LED rate indicator

Yeah, those both worked beautifully, thanks. I tried both a gradual and hard-stepped version but preferred the latter since gradual seems asymmetric at lower speeds (LED appears ON more than OFF). For anyone who comes across the thread later, here's the code I used: ;--- Gradual LED indicator cho rd...
by mark2
Tue Feb 15, 2022 6:36 am
Forum: FV-1 software questions
Topic: Range of DACL/DACR? LED rate indicator
Replies: 3
Views: 7185

Re: Range of DACL/DACR? LED rate indicator

Thank you, that makes a lot of sense. I'll give it a try.
by mark2
Mon Feb 14, 2022 10:21 am
Forum: FV-1 software questions
Topic: Range of DACL/DACR? LED rate indicator
Replies: 3
Views: 7185

Range of DACL/DACR? LED rate indicator

This just isn't "clicking" for me at the moment. I'm trying to use DACR to create a rate indicator LED. I have the following to simply conditionally set the output depending on the sign of SIN1: ;--- Rate indicator cho rdal, sin1 skp gez, LED_ON ; sof 0, 0 ; set ACC to zero wrax dacr, 0 ; ...
by mark2
Sun Jan 16, 2022 10:39 pm
Forum: FV-1 hardware questions
Topic: Timing for switching banks or patches
Replies: 5
Views: 9163

Re: Timing for switching banks or patches

Hi Mark, from your description it sounds mode like you have a bypass switch pop noise when switching between effect and bypass rather than noise from effect changing (Sx). I would look at your bypass switching first to see if you have a problem there. OH yes, that's exactly what I think is going on...
by mark2
Wed Dec 08, 2021 8:54 am
Forum: FV-1 hardware questions
Topic: Timing for switching banks or patches
Replies: 5
Views: 9163

Re: Timing for switching banks or patches

Thank you both, this really helps.

I'll obviously try to fix the root issue first. Failing that I'll try toggling an Sx lines and waiting about 20ms, then toggling back.
by mark2
Tue Dec 07, 2021 6:05 pm
Forum: FV-1 hardware questions
Topic: Timing for switching banks or patches
Replies: 5
Views: 9163

Timing for switching banks or patches

For reasons (described below) I may end up needing to momentarily switch patches (S0-S2) or banks (T0) with a microcontroller, then switch it back. i.e. toggle pin 13, then toggle it back. Or the same for one of 16-18. Questions: A. Is one option faster or otherwise preferable to the other? B. What'...
by mark2
Sat Aug 14, 2021 12:09 am
Forum: FV-1 software questions
Topic: Metallic clicking sound with reverb (SpinCAD Reverb_Hall)
Replies: 2
Views: 8088

Metallic clicking sound with reverb (SpinCAD Reverb_Hall)

I don't know how to describe it, but here's a clip: https://www.dropbox.com/s/s7uuqs07rtux4 ... k.mp3?dl=0

Does anyone know off the top of their head what might be causing it? It happens when I introduce the "Reverb_Hall" block in SpinCAD.