ampage
Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

 
Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  
previous: Enzo There are pitch shifting effects un... -- 8/6/2004 11:17 PM View Thread

Re: Octaver Effects

8/9/2004 7:33 PM
Mark Hammer
email
Re: Octaver Effects
The E&MM Harmony Generator project at my site (http://hammer.ampage.org ; scroll down a few pages) does precisely this. This is a project by Paul Williams that appeared in Electronics and MusicMaker quite a few years back.  
 
It uses a 4046 chip as a tracking oscillator to generate a note well above the actual pitch of the note you play (like most octave dividers, this is a mono device). That note, in turn is divided down by a counter chip to yield a variety of intervals, including fifths.  
 
There is a PCB layout included in the PDF files. If you want to build the project, though, you will need to: a) digitally tidy up the PCB layout with a paint program of some type, b) rescale it so that its spacing matches that of the chips, and c) flip it mirror image if you wish to use press-and-peel or some other similar method of transfer-based etch resist.  
 
I've never made it but apparently it works fine from reports.

 
Replies:
Rob cheers, looks a tad complicated but... -- 8/9/2004 9:53 PM