Omni Drive Filter Section - help please.

[axeman010]

Hi All

Another newbie I am afraid !!!!!

Have just built my first pedal and went for the Omni Drive to get to grips with the various elements of distortion pedals.
I have read all the archives about the pedal and have come up with some mods that I intend to try.

However the I could not find anything about the filter section - it does not seem to provide a great change when
engaged - please could somebody tell me how this works and potential mods.

Many thanks !!!

[SISKO]

Hey!. It was my first build some time ago, too.
IIRC, the filter section its a low pass filter. Just that, it adds more bass to your sound.
In my unit, the "filter" was not very noticeable, but i could hear the diference.

Bye
SISKO

[Mark Hammer]

The octave-up section doubles the frequency of whatever you feed it - in principle - so it is a common strategy to limit the frequency content going into an octave-up fuzz so as to make the octave above the note more noticeable, rather than just crank up ALL harmonic content, regardless of its source.  Because simply distorting a signal will not necesarily change the overall bandwidth of the signal, but just how much more emphasis there is in some parts, often some types of pre-clip toneshaping may not seem to show up.  For instance, I imagine many folks have found that switching pickups or changing the guitar tone control setting does not do very much to their sound when using some distortion pedals.  It sounds a little different, but still sounds every bit as fizzy and fuzzy as before.

So, the filter section will likely have some impact on the performance of the octave-up portion of the Omni-drive, but will not have a huge impact on the performance of the more generic distortion section. In truth, if you wanted to have it play a more "active role, it really should come after the distortion/fuzz section, rather than before the octave section.