MATRIXSYNTH: Useful Synth Circuits


Showing posts with label Useful Synth Circuits. Show all posts
Showing posts with label Useful Synth Circuits. Show all posts

Sunday, January 26, 2025

Oberheim SEM SUB-oscillator Mod


video upload by Eric Beam

Also see this post.

"I saw this SEM SUB-oscillator floating around the internets and had to give it a go. 5 stars would go again. Available here from ‪@Lackan110f‬ https://reverb.com/shop/peters-gear-g..."



via this listing

Note the Marion Systems logo on the board. As readers of the site likely know, Marion Systems was Tom Oberheim's follow-up company after Oberheim.

"SUB-oscillator module for the New Oberheim SEM Pro (2009). Installation is very simple, you just have to solder one wire to the +15V point and then attach three connectors.

The +15V point can be located in various places depending on if it is a Marion or Oberheim, and also what model it is. So a multimeter is recommended to verify +15V.

This will give you a -1 octave SUB-oscillator using the EXT-IN knob #1, or a -2 octave SUB-oscillator using the EXT-IN knob #2.

You can also mount it so that you keep EXT-IN on #1 and have SUB -1 OCT on #2 (SUB -2 OCT is then omitted). Se illustration.

Does NOT work in an older vintage SEM (1974-1979) due to different connectors. (the video shows a vintage SEM, but this product is for the New TOM SEM Pro 2009)"

Saturday, November 16, 2024

SUB Oscillator for the Oberheim SEM Module


video upload by Lackan

"This is a demo of a SUB Oscillator for the Oberheim SEM Module. It is very easy to install using the Molex connectors, thus being totally harm free to the Oberheim SEM. Available at www.usefulsynthcircuits.com"

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