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 Forum index » DIY Hardware and Software
I made a neat sounding octave pedal. Sound sample inside.
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synthmonger



Joined: Nov 16, 2006
Posts: 578
Location: flada
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PostPosted: Mon Dec 18, 2006 2:58 pm    Post subject: I made a neat sounding octave pedal. Sound sample inside. Reply with quote  Mark this post and the followings unread

Lemme know whatcha think!

-- in the sound sample I only use the 3 sub-octaves.
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robthefiddler



Joined: Nov 10, 2006
Posts: 15
Location: Dallas, Tx

PostPosted: Mon Dec 18, 2006 4:00 pm    Post subject: Re: I made a neat sounding octave pedal. Sound sample inside Reply with quote  Mark this post and the followings unread

Here are some experiments with using a counter for octaves, although, in
this case, its more of a noisemaker than a pedal.

http://www.robthefiddler.com/electronics-audio-diy/circuit-experiments/subripplerv1/


Note that I used a 4060, so technically, the first division is like 1/16th
the clock. For something like your app, you would just want an
inverter or something to square up the signal as conditioning for
a clock signal. Perhaps a LP filter before that.

Would be neat to see it.

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synthmonger



Joined: Nov 16, 2006
Posts: 578
Location: flada
Audio files: 3

PostPosted: Mon Dec 18, 2006 4:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

Oh wow thanks for the link! Another page worth bookmarking fo' sho'.

I used a 4024 and passively mixed them together. I wanted to make it as simple as possible.

The only problem I had was getting any decent sustain, but I think increasing the gain on the incoming signal might just do the trick. Right now it just kinda 'crackles' out on the sustain.

I got some interesting results when running the signals through a 40106 then through a 4030. Very very sqaurey results.
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robthefiddler



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Location: Dallas, Tx

PostPosted: Mon Dec 18, 2006 5:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

Ya...thats kinda why I used that TL082...as its a dual op, I had planned using the other half as a lowpass filter before the schmitt. It could filter out the transients and with a little gain, add to the sustain, but I had the wrong counter and was getting fun bleeps with what I had.

Regardless, if you using a counter (or a flip flop) for sub octaves, it
seems like an op amp in the front (LP + Gain) and one as a summer would be the way to go.

Check out Craig Anderton's Tube-sound Fuzz
http://www.muzique.com/schem/tubesnd.gif

Seems like a good first stage....but dont worry much about that
"Distortion", once its clocked down, its squaresville.

See if you can dig up the first stage of a MXR Blue Box....I think
thats what you want.

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synthmonger



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PostPosted: Mon Dec 18, 2006 6:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Ah that's funny. The MXR uses a 4013 flip-flop. I was going to try that first but the 4024 was much easier. Back to the ole' breadboard.
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