Re: Drifting/Pitch changes

[landman@wco.com (Mark Landman)]

Using this technique would it be possible to have much wider changes in the
clock frequency? The only function the Echoplex is missing is variable
speed/pitch (or even just a half speed octave down switch). Of course, this
is probably the last thing you want to think about having just finished the
updateÉ

Best-

Mark


>>One particular slightly aged stadium rock star wanted to know if we could
>>set up a pedal to control the amount that stereo unsynced loops went out 
>of
>>phase! Do you see why this is so hard?
>>
>>Anyway, you can probably retain your clock drifting experiences on the
>>upgrade by leaving the brothersync cable out and setting the sync to 
>"off"
>>like you have it now. That way, the stereo units will start and stop the
>>loop record at the same time by the midi command, but will have no other
>>points of reference to each other. So they will naturally drift apart.
>>
>>...and no I'm not going to make a pedal to control it.
>
>I am not going to do it either, but it would not be too complicated:
>Build a 44.1kHz generator (with 74HC03, for example) and change its
>frequency slightly with the pedal (the pot in series with the feedback
>resistor of the generator). Then feed the signal with a open collector
>buffer (another part of the HC03) into the tip of BrotherSync.
>Can easily be battery driven and probably could even be fed by the signal
>coming out of the BrotherSync tip. About a 1k resistor and a big capacitor
>should create The necesary 4V or so for the chip.
>Anyone?
>
>Matthias