Yahoo Groups archive

MOTM

Index last updated: 2026-04-28 23:35 UTC

Message

Re: [motm] OT:polyfusion hipass filter...

2001-10-12 by J. Larry Hendry

Congrats Doc.  Adding a little DIY to MOTM can be fun.
This does illustrate a point I like to bring up now and then.
This is more than a synth project.  It is an education.  Thanks
to Paul for helping it to be that way.
Larry H

----- Original Message ----- 
From: <doc@...>

h3y all,
anyone know anythin' about the polyfusion hipass filter??
  i just finished buildin' one this week.  in my general ignorance of 
electronics i am assuming it is a 4-pole filter as it has 4 stages.  
i doubled the number of stages an' gave it outputs at stage 4 and 
stage 8.  after starin' at the the schematic for the 420 a spell, i 
worked out how to incorporate a reversin' attenuator input as well as 
a simple attenuating input for cv.
  i was lookin' for a hipass with a different flavour than the 420, 
an' the polyfusion was the only schematic i have run across.  the 
sound is a little dirty, but in a nice way.  i rather like it 
overall...  lotta fun patchin' S&H with a medium slew rate into FM1.
thanks,
doc

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.