[sdiy] MXR Pitch Transposer Schem/Circuit

Tom Wiltshire tom at electricdruid.net
Fri Mar 8 17:13:38 CET 2013

That's a damn interesting gizmo. Does anyone have any idea how it works?

On 8 Mar 2013, at 15:32, Travis Thatcher <recompas at gmail.com> wrote:

> While not technically SDIY (I apologize) I just got a black face MXR
> Pitch transposer yesterday. Its a pretty amazing sounding piece of
> gear with very little info on the web about it.  I did some quick
> experimenting with the cv input and a sequencer and was very pleased
> with the results but I was curious if anyone else had any experience
> with these, particularly any mods or schematics.
> I'm assuming its an older bbd based design, though the chip which I'm
> guess is the bbd has had the labeling info removed. It does great
> pitch shifting and with the regen cranked it goes from weird flanger
> to space sounds pretty quickly. It sounds very similar to a friend's
> mxr flanger that I fixed so I'm assuming the circuit is roughly the
> same. Kind of interested how it works!
> -- 
> http://www.travisthatcher.com
> http://www.soundcloud.com/travisthatcher
> http://voiceofsaturn.blogspot.com
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