Here's a short video of a random changing melody using the Doepfer A-152 Track & Hold section.
The changing nature of it is created by sending the A-152 a clock from Pamela's Workout with a skip so that it will hold at a different point each time it skips a clock.
You can also send it a steady clock that doesn't match the length of the sequence which will give you a changing melody, but it will loop depending on the length of sequence in relation to which clock division you sent it.
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