Nice. ... What do you mean by sound looper?
I haven't tried to understand what you're doing yet. But I truly enjoyed simply listening to your exploration.
Sound on sound looper is commonly used to describe a way of looping, or repeating your playing back to you seemingly infinitely.
This is often used to describe the effect when you turn a delays feedback all of the way up, but it is typical of a delays sound quality to degrade the more times it its repeated so it isn't quite a looper. (analog delays at least.)
What this trick is basically doing is making use of the REV2s Hold feature to sustain any notes you play infinitely. (In fact you can achieve a similar effect on a synth without a Hold feature just by turning the release all of the way up.)
When using the Hold button, it holds the notes at their Sustain rate. Attack, decay, and release typically don't apply because the hold function is basically an imaginary finger holding the note for you. You don't get to hear the other stages.
What I've done is use a Reverse Saw LFO to simulate a natural decay to silence of a plucked note. Since we keytrack this LFO, it triggers whenever a new note is pressed and therefore it sounds and feels just like your playing individually plucked notes (even though in reality they are sustaining forever.) The Rev2 has what is called Poly LFOS, which allows each note you hit to follow the its own cycle from the moment you hit it to the moment the LFO loops back on itself.
The repetition of the reverse saw length corresponds with the LFO speed and give the impression that the note is repeating over and over again infinitely (or until you use up your voice limit.)
Hope this helps!
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