Search found 141 matches

by Sweetalk
Fri Jul 17, 2015 5:11 am
Forum: FV-1 hardware questions
Topic: What is the best way to use mono input to both ADC's
Replies: 18
Views: 24536

That is the method I have always used, with both inputs directly linked together. I was just wondering if this was good practice or may introduce a small hum. Would separating the inputs through separate dc blocking and LP filter networks benefit at all? ;read both inputs and store in 'dry' registe...
by Sweetalk
Wed Jul 15, 2015 5:37 am
Forum: FV-1 hardware questions
Topic: What is the best way to use mono input to both ADC's
Replies: 18
Views: 24536

If you don't bypass the inputs there's Vcc/2 on each one. I'm tying both together and reading them both also. That is the method I have always used, with both inputs directly linked together. I was just wondering if this was good practice or may introduce a small hum. Would separating the inputs th...
by Sweetalk
Tue Jul 14, 2015 6:35 am
Forum: FV-1 hardware questions
Topic: What is the best way to use mono input to both ADC's
Replies: 18
Views: 24536

If you don't bypass the inputs there's Vcc/2 on each one. I'm tying both together and reading them both also.
by Sweetalk
Mon Jun 22, 2015 5:32 am
Forum: FV-1 hardware questions
Topic: Using 6 Pots on the FV-1
Replies: 7
Views: 16354

I thought doing this but with digipots controller by another uC and a control input (maybe the unused ADC). So when that control input is high the pot value will affect a set of registers, and when it's low other set of registers. It's a nice workaround, at least for prototyping where you have tons ...
by Sweetalk
Fri May 29, 2015 8:09 am
Forum: Algorithm development
Topic: CHO RDAL
Replies: 6
Views: 9725

Solved (I think), the sin and cos looks good in the scope (don't know really what happened) but seems to have the same phase, like if the sin and cos where the same.
by Sweetalk
Thu May 28, 2015 12:14 pm
Forum: Algorithm development
Topic: CHO RDAL
Replies: 6
Views: 9725

I'm using the cho rdal to read the value of the LFOs. I need to use sin0, cos0, sin1, cos1 for several stages of the code for synchronize effects. Started with some simple tests reading the LFOs values and sending to the DAC's. The sin0 and sin1 are perfect, but when I try to see the cos0 or cos1 in...
by Sweetalk
Fri Jan 23, 2015 6:30 am
Forum: FV-1 hardware questions
Topic: Cascade Left and Right Channels
Replies: 4
Views: 6648

I'm doing this in a design for feedback (not enough pots to do it digitaly) using the same LPF as in the input. Yeah I have also done the same before, by using the left output to feed the right input for a feedback control, I did use an op amp buffer but also kept the same output input filtering. I...
by Sweetalk
Thu Jan 22, 2015 6:02 am
Forum: FV-1 hardware questions
Topic: Cascade Left and Right Channels
Replies: 4
Views: 6648

I'm doing this in a design for feedback (not enough pots to do it digitaly) using the same LPF as in the input.
by Sweetalk
Fri Oct 03, 2014 5:24 am
Forum: FV-1 hardware questions
Topic: Question on noise.
Replies: 8
Views: 10691

Thanks Sean, the pre/de-emphasis is how it has been done now and the results are a big improvement. @Sweetalk in the version I have that just has unity gain buffers which I was asking about originally, on the output of the FV-1 using a 1k - 100n R/C combination works well but experiment from 33n to...
by Sweetalk
Thu Oct 02, 2014 6:01 am
Forum: FV-1 hardware questions
Topic: Question on noise.
Replies: 8
Views: 10691

I have the same hiss on the output, more hiss as the output volume of the FV-1 increases.

Ice-nine can you send me the values of the modified filter to check out if it works for my board?
by Sweetalk
Tue Jul 22, 2014 7:39 am
Forum: Algorithm development
Topic: Delay with modulation
Replies: 17
Views: 25350

In the Memory Man (and other analog delays with modulation) only the delayed signal gets modulated.
by Sweetalk
Wed Jun 18, 2014 5:39 am
Forum: Algorithm development
Topic: Improved octave-up routine
Replies: 6
Views: 10168

I'm thinking in some sort of limiter to chop the amplitud modulation of the tremolo
by Sweetalk
Tue Jun 17, 2014 8:18 am
Forum: Algorithm development
Topic: Improved octave-up routine
Replies: 6
Views: 10168

I'll give it a try, I'm working on a way to cancel the tremolo effect for the octave, still no results :S
by Sweetalk
Wed May 28, 2014 8:09 am
Forum: FV-1 hardware questions
Topic: Startup "strangeness"
Replies: 10
Views: 10788

Mail me the layout if you like, maybe there's a little thing you're not taking care of
by Sweetalk
Wed May 28, 2014 5:42 am
Forum: FV-1 hardware questions
Topic: Startup "strangeness"
Replies: 10
Views: 10788

Power is 3.0 V clean, regulated, locally bypassed on the daughter board. It's supplied by a L78L33ACZ with a 47uf output filter (minimum required). The same basic artwork is used in a reverb pedal that sometimes (although rarely) does this same thing and uses a 9V external plug in supply and the sa...