Stereo Delay

falco_femoralis

falco_femoralis

Well-known member
Hi all, I had a request from a customer yesterday about procuring a stereo delay. He specifically wanted a small form factor one, so I recommended a DD-8, but not until looking into it for a bit.

In my thought experiment, I came up with the idea of using two DMD-2 boards, one with an FV-1 chip, and populating just enough components of the second board to satisfy the input for the right channel of the FV-1, then duplicating the left channel's output onto the second board, but connecting it to the right channel of the FV-1. I would also have to address the Feedback control. I imagine one of the three control pots of the FV-1 would do this, but I'm not sure. I think it depends on the algorithm in the eprom chip?

Then, it would have two inputs and two outputs, and I'd use switching jacks for the right channels such that when a jack is not inserted, it shunts the right channel to ground.

This would have to fit in at least a 1590bb, if not a 1590xx, so I couldn't satisfy the customer's request of a small form factor, but I'd like to think it would have worked otherwise. What do we think?
 
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The Binaura (although 1590BB) is already set up for stereo and would run the DMD-2 algorithm no problem.

The only catch, the DMD-2 algorithm isn't stereo.

falco_femoralis said:
Then, it would have two inputs and two outputs, and I'd use switching jacks for the right channels such that when a jack is not inserted, it shunts the right channel to ground.
Click to expand...

I think a more common approach is to shunt the right channel to the left channel when no plug is inserted so both outputs still have a mono signal.
 
^ we weren't married to the DMD-2 specifically. I had that one picked out because it was easier to manipulate the FV-1's right channels than the Pythagoras board. But I missed the Binaura entirely. Are the delay algorithms here stereo?
 
No, not yet.

I could probably hack a right channel into the DMD-2 algorithm... it'd cut the delay time in half but you could use a clock module to slow down the FV-1 and stretch the time out longer.
 
That sounds really interesting, but I'll let it be - I don't have a second amp to experiment and troubleshoot stereo effects. If I had to maintain a commitment for a customer, I'd work something out ;)
 
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