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Re: square waves

On the old David Torn instructional video, he mentions the oscillator in 
the machine and demonstrates its effect with some harmonized delays. 
Forgive my ignorance, but is an LFO present as a controller for any sort 
of time-based modulation, i.e., the rate control on a simple chorus 
pedal? Does every harmonizer have an LFO? And do looping machines such 
as the Repeater which offer some pitch control also have an LFO?  Or is 
the PCM-42 unique in having this effect available in its delays/loops...?

Daryl Shawn
www.swanwelder.com
www.chinapaintingmusic.com

> The PCM-42 delay line has an LFO which is used to modulate the delay 
> line, it can be used to create flange, chorus or wobbly echos. It has 
> two waveforms available, triangle and square. If you use an expanded 
> memory PCM-42 and modulate your loop with the square wave the effect 
> will be similar to having someone switch the speed of a tape machine, 
> with dramatic jumps in pitch and speed.