guitar sine wave synthy pedal!..????????

[EATyourGuitar]

what about pedals like pigtronix mothership. these pedals already exist they are just monophonic. if you want poly get a roland midi pickup and run it into a sound module. I agree that sine waves are boring and they dont cut through the mix, BUT, if you had a sine pedal you could run that into your fav dist, fuzz, phaser, chorus, ring pedal for new sounds.

[RazorbladeRay]

pardon me perhaps i can help with this problem. your looking for something simple that has at least a sine wave in it. try the MWFX Epic Wave Machine. it's not out yet but it has every VCO Oscillators in there.
Sine, Square, PWM, Sawtooth and Triangle. But sadly it is Monophonic. It is the only sine wave in a pedal i found so far.

[psychedelicfish]

you could just try one of these:
http://folkurban.com/Site/SimpleSquareWaveShaperMadeSimpler-712.html
with set resistors instead of p1 and p2, and a bit of soft clipping and LPFing on the output

[FUZZZZzzzz]

pardon me perhaps i can help with this problem. your looking for something simple that has at least a sine wave in it. try the MWFX Epic Wave Machine. it's not out yet but it has every VCO Oscillators in there.
Sine, Square, PWM, Sawtooth and Triangle. But sadly it is Monophonic. It is the only sine wave in a pedal i found so far.

they sure make nice pedals!

[Uoki-Toki]

http://www.diystompboxes.com/smfforum/index.php?topic=90283.0

[liquids]

I had some really, really interesting stuff going with this before...well...before things happened.
I'm not talking about the synthbox.

It's been a while...like, a long while.  I don't even remember what I remember anymore.
But I did share SOME of what I was doing, to a point, in the thread.   Even if I were at some point willing to talk about it more, it's too distant to recall where I was and how it was working...but this may help you.  
It's not for the unititated...nor if you can't play single notes cleanly like at least a wannabee jazz-guitarist/ wannabee joe satriani (etc.).


Thread: http://www.diystompboxes.com/smfforum/index.php?topic=96692.msg840701#msg840701

You'll hear sawtooths here...but sawtooth was just what I was going for.  It took work to get it.  I realized that after one had the right stuff, if one is creative, you can 'get to' nearly any waveform by 'silly' or by "real deal" means.  
It took me a lot of research, trial, etc to get what I wanted.  Much was indebted to Thomas Henry, and discussions with THE MAN (Harry Bissel, who else), and COUNTLESS others who diologued with me personally and/or offer circuits on the web...

Sound clips:
http://www.aronnelson.com/gallery/main.php/v/liquids/Short+Demo.mp3.html
http://www.aronnelson.com/gallery/main.php/v/liquids/Synth/Sawtooth_Clean_amp_Compressed.mp3.html

[deadastronaut]

^ cool...that is sick!..

sounds like it will sustain a very long time too..

[gcme93]

Eurgh that tracking is insaane! That is beautiful.

I had a quick scan through that thread, and I completely get your logic as to not posting a schematic - it's not the kind of project you can copy pin for pin and adjust the voltages to what they "should be".

Any chance you could give us a quick block by block explanation of how the tracking works?

(e.g 1 - Filter roughly <1kHz
       2 - Make signal Square
       3 - Amplify/compress suitably for the LM2917 input
       4 - Send LM2907 to <this circuit> to make linear Control Voltage
....)

[liquids]

Eurgh that tracking is insaane! That is beautiful.

I had a quick scan through that thread, and I completely get your logic as to not posting a schematic - it's not the kind of project you can copy pin for pin and adjust the voltages to what they "should be".

Any chance you could give us a quick block by block explanation of how the tracking works?

(e.g 1 - Filter roughly <1kHz
      2 - Make signal Square
      3 - Amplify/compress suitably for the LM2917 input
      4 - Send LM2907 to <this circuit> to make linear Control Voltage
....)

Thanks.

I don't really remember.  It's probably all somewhere on breadboards in boxes, but if I could even re-trace it and get it working again is questionable.
It's probably somewhere amid emails, but I probably won't go searching again until I'm back to tinkering (been a while now...)

I had a ton of ideas I never even got to implement but it was pretty good as-is, agreed.  
One added idea was adding a hybrid filter for the tracking which utilized "static" filtering AND a "tracking" filter.  The DOM/EH does a tracking filter in essence...but this was a completely different approach to try out, especially in conjunnction with static filtering (that's all I had going there for pre-filtering).

So, while not necessarily in this order, but much like you said....filter, boost compress, make Ultra SquareSquareSquare.    
Check out the LM29x7 datasheet and see what it does...it puts out a voltage.  Hook up your oscilliscope, and see what it does for voltage when you feed it a big loud note over the course of time...

From there, there should be some sense with Scott Gravenhorsts Paia circutry.  I probably posted a bit about this at electro-music too...but it's been~ a year, give or take a year.

There's a heckofalotta stuff to figure out because even if I DID know and offer all the blocks, tweaking would be critical. I learned from the synthbox project and a few other experiences that people that "can't play" will blame their build/the circuit anyhow.    

The PLL 4046 is a much easier place to start and refine tracking, glitchiness, etc.  It's got a VCO already.  Sure it's got a different sound and it's got some quirk and it's not a sawtooth...but, hey, one block at a time...

[Gurner]

Bit late into this thread, but this piqued my curiousity....

Another approach is to lowpass-filter the guitar output so it only has one zero crossing per fundamental cycle, convert that to a square wave, then run the square wave into the reference input of a phase locked loop (PLL).

....how can you implement an LPF that will stamp on the second harmonic at 82Hz & all the way through 1200hz? (ie the approximate full fundamental range of a standard electric). Unless I'm missing the cut & thrust of your suggection...let's say you implement an LPF to squash the 2nd harmonic for 82hz      ...then any notes that are higher than say 120hz are going to be heavily attenuated. This is all fine if you only play low open E...but what happens when the next note you play immediately afterwards is top open E? (about 330hz...it won't get through the LPF?)