[sdiy] Configurable Phase Shift Project

[Scott Stites]

It occurs to me that I have some samples using the original 2N7 cap with 1.5M in parallel with the LDR's.  They're on the Electro-Music Forum, with links supplied below.

All of the following samples were made using the 2n7/1.5M arrangement.

This is a slow, resonant sweep, using the DW6000.  I like the low response, but my concern was that not enough of the response was shifting to the treble range.  It's 12 stages, but with a twist - one channel is tapped from the 10th stage, one channel is tapped from the 12th stage, with resonance tapped from the 12th stage.  This is a great way to get an interesting stereo response out of a phase shifter!

http://www.electro-music.com/forum/download.php?id=4014

This is a sample of the DW6000 run through two six stage sections in stereo (six stages left, six stages right) each with their own control lines.  Kind of a Mutron Biphase setup.  One channel is modulated with a combination of pulse and triangle and the other channel is modulated with an inverted copy of the same signal.  

There are two distinctive qualities about this sample - first, it demonstrates, rather than the sharp transistions associated with OTA/Transistor controlled phasers, the more slewed response of the Vactrol phaser.  Nice when you want it, not so nice when you don't.  The nice thing is that it gives it a sort of 'woody' texture when pulsed.

The second quality is that, if you listen to it, you'll notice one channel sounds a bit 'sharper' than the other channel.  This drove me nuts until I figured out why.  One capacitor, in the second stage, was a 1N cap instead of the 2n7 used elsewhere (a mistake when breadboarding).  I liked this sharpness, and was sort of what sent me looking for a more treble-tilted shift this weekend.  I'm thinking I may shift the pendulum back a bit, no pun intended.

http://www.electro-music.com/forum/download.php?id=3978

This is a 12 stage sample, modulated with saw and pulse.  Really woody, drum like sounds from the modulation.

http://www.electro-music.com/forum/download.php?id=3980

By the way, the Electro-Music forum is great place to drop by.  There is a DIY section, but, just as importantly, it's a great place for those of you who are actively recording music to make your work known - they encourage it.

http://www.electro-music.com/forum/download.php?id=3978

The samples were from this mutating thread:

http://www.electro-music.com/forum/topic-10024.html

Cheers,
Scott



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