I built up a second prototype of the LowRider (Pearl Octaver) to see if I could overcome some of the issues with the first. I'm happy to report it came out really well! Now I can fix the first build :)
Here's is a really short demo featuring some octave up, one and two octaves down all mixed together.
cool, sounds like it tracks pretty good. every octave down effect I've ever messed with was glitchy as hell.
cool as hell.
Yeessss please!! This sounds fantastic! Great playing by the way ;)
Is this one of the upcoming projects? Please say yes...haha
-Kaleb
I'm gonna need a bigger pedalboard...
I'm really liking the sound of this. Seems like it does what I wanted the POG to do.
I think this is going to be released as a public project - boards will be available when it's ready.
However, it isn't a polyphonic pedal, so it won't quite do what a pog does. As far as I know, the tracking is only for one note at a time. Too bad I know, but still it's pretty great for a clean octave up and down pedal.
Jacob
Quote from: jkokura on August 18, 2011, 10:10:09 PM
However, it isn't a polyphonic pedal, so it won't quite do what a pog does. As far as I know, the tracking is only for one note at a time. Too bad I know, but still it's pretty great for a clean octave up and down pedal.
I guess i'll have to build three of them. ;D ;D ;D ;D
Man, this would go so well with an autowah! I'm definitely in for one of these! 8)
It was difficult to pick up the upper octave. I tried to make one of these from a layout on another forum but was never sure if I got the upper octave right because it was not prominent at all. Do you find this to be the case with the design? The lower octaves sound real good and I think track quite well. Looking forward to seeing this project in the future.
Quote from: slimtriggers on August 19, 2011, 12:45:16 AM
Man, this would go so well with an autowah! I'm definitely in for one of these! 8)
Yeah, no doubt. I'd like to hear it with the dipthonizer.
I want it. Nuff Said.
The upper octave is not very strong in this design, it seems. It's there, but the lower octaves are just much stronger. Without the lower octaves it becomes much more prominent. I do plan on trying to tweak the upper a little to see if I can boost it. However, it definitely adds grit to the overall sound.
that sounds amazing!
Quote from: timbo_93631 on August 18, 2011, 09:31:41 PM
I'm gonna need a bigger pedalboard...
for real, right? And more patch cords. Put me down for one please!
Incredible! I dig your chops too! Try it with bass yet?
No, but I have tried it with a baritone and it sounds thunderous.
QuoteI do plan on trying to tweak the upper a little to see if I can boost it.
I am looking forward to hearing this. Thanks.
Now this has me really excited.
I've been using a micro POG to get a subtle 12-string sound, but the octave up sounds god-awful past about 10 o'clock. It sounds like a cheesy kids' keyboard.
Does this guy track well enough to play chords and know any other solutions for getting a faux 12-string sound?
Sounds awesome! I want this and a dipthonizer so bad lol
That is sweet!!! I gotta have one. When will it be available? Soon?
Your playing is pretty good. Kinda reminded me of Jonny Lang a bit.
Quote from: madbean on August 19, 2011, 09:43:05 AM
The upper octave is not very strong in this design, it seems. It's there, but the lower octaves are just much stronger. Without the lower octaves it becomes much more prominent. I do plan on trying to tweak the upper a little to see if I can boost it. However, it definitely adds grit to the overall sound.
There was an old post by Z.Vex on DIY stompboxes that explained how to bring out the upper octave... it apparently made it a lot fuzzier but it might be worth looking in to.
Quote from: jubal81 on August 21, 2011, 03:39:04 AM
Now this has me really excited.
I've been using a micro POG to get a subtle 12-string sound, but the octave up sounds god-awful past about 10 o'clock. It sounds like a cheesy kids' keyboard.
Does this guy track well enough to play chords and know any other solutions for getting a faux 12-string sound?
From the reviews I read, it can track them a bit better than some Analog octaves (as in it doesn't go completely glitchy but still not quite right) but it wont have the same tracking as something digital like the Micro Pog.
Hey Bean, did a little research for you... the Mod Z.Vex posted was actually on Harmony Central, I couldn't find the original post but I found one quoting it... apparently C10 & 12 are removed to bring out the upper octave, looking at the original schematic that would be an 0.01 & 0.033uF Cap
http://www.experimentalistsanonymous.com/diy/Schematics/Vibrato%20and%20Pitch%20Shift/Pearl%20OC-07.jpg
Near IC6 in the signal path, worth a shot!
Even found a clip of it post mod!
Quotehttp://www.home.no/yomamasopurdy/oc-07.mp3
The clip goes like this:
guitar without fx
1 octave down
2 octaves down
1 octave up
1 octave down, 2 octave down AND 1 octave up
Hope that helps!
Thanks MB for this! I'd really like to compare it with my OC-2 side by side! Can't wait! ;D
Nice!! I had no interest in an up/down in one box... but that sounds cool as hell! Much better than the standard Blue Box!
Couldn't you lower the 56K resistor (R49 in the gaussmarkov schem) to bring out the upper octave more? It seems this just goes into a weighted summer summing the normal signal and the upper and lower octaves. If you lower the value of the upper octave weighting resistor the gain goes up relative to the other signals.
Quote from: Scruffie on September 01, 2011, 03:03:20 PM
Hey Bean, did a little research for you... the Mod Z.Vex posted was actually on Harmony Central, I couldn't find the original post but I found one quoting it... apparently C10 & 12 are removed to bring out the upper octave, looking at the original schematic that would be an 0.01 & 0.033uF Cap
Edit: just saw this. This should work too. This mod is just removing the two low pass filters after the upper octave is generated. I am guessing there is such heavy filtering to remove said distortion. You could just lower the values until all they are clipping out is the fizz.
How the heck does this circuit work by the way? I can see one half wave rectifier for each octave (envelope followers?). The upper octave just amplifies this rectified signal. The lower octaves control the gate of FET's which short a differential amplifier to ground (amplifying a half clipped normal signal when shorted). To me it looks like the envelope is enabling the two lower octave amplifiers which then go into an opmap configuration i've never seen before. Is that an oscillator?
Edit #2: NVM Mark Hammer has a great explanation over at DIYSB
http://www.diystompboxes.com/smfforum/index.php?topic=89385.0 (http://www.diystompboxes.com/smfforum/index.php?topic=89385.0)
Quote from: Scruffie on September 01, 2011, 03:03:20 PM
Hey Bean, did a little research for you... the Mod Z.Vex posted was actually on Harmony Central, I couldn't find the original post but I found one quoting it... apparently C10 & 12 are removed to bring out the upper octave, looking at the original schematic that would be an 0.01 & 0.033uF Cap
http://www.experimentalistsanonymous.com/diy/Schematics/Vibrato%20and%20Pitch%20Shift/Pearl%20OC-07.jpg
Near IC6 in the signal path, worth a shot!
Even found a clip of it post mod!
Quotehttp://www.home.no/yomamasopurdy/oc-07.mp3
The clip goes like this:
guitar without fx
1 octave down
2 octaves down
1 octave up
1 octave down, 2 octave down AND 1 octave up
Hope that helps!
Props Scruffie! Thanks for the demos too, looks like a must have pedal now!
sounds great.
I think i found my next project. Awesome...
Paul
Very nice. The two octave down did not come through my laptop speakers (no surprise there).
I dig the loop then tweak way of doing the demo...I might have to try that in the future!
Yeah the -2oct is hard to hear on some parts, mightve been issue with my camera, too.
It is definitely there though.
I just did a side by side comparison of the Lowrider I just finished with my old Boss OC2, and I'm beginning to wonder why I hunted down so many vintage pedals. The tracking is quite comparable, but I have to call the Lowrider the winner on the low notes in particular. I'm glad to see I didn't waste any of my germanium diodes!