On Tue, Jan 8, 2013 at 4:14 PM, Carey Fisher wro= te: > The NCS-3230 Multi-Rx offers the > ability, not only to select left/right ear for any number of the 6 radios > (audio sources) but in the "spatial" mode, the two speakers are used to > spread out the audio from 6 radios from left to right giving apparent > spatial separation to the 6 radios for easy identification of which radio > the operator is hearing. Diagram is > here. > The effect is really pronounced with a stereo headset. All this is done > with opamp mixers and a few 4053 switches (and, of course, a PIC :-) Hi Carey, Ah, I completely forgot to check the ham side of the NCS site! That's a pretty neat system! The spatial mode is very cool. I'm still doing a bunch of reading, but the PSoC idea is gaining some steam. It will mean a bunch of re-learning for me, but that shouldn't be too bad as ultimately the code is fairly simple, waiting for button presses and affecting outputs. What I like about the system is that even though the audio stays analog, all of the gains and routing are under digital control. I'd love to do this via a PIC, but I'd have to use a bunch of external op-amps and digital pots. With the PSoC it'll all built into the chip. I still need to do more research to figure out if the chips are capable of all the routing options I want, but so far they are quite interesting. Any pointers to similar PSoC audio routing/control projects would be appreciated. I've already got the app note, and I found errata for a Circuit Cellar article that seems to be extremely similar. I haven't see the original article yet though. Thanks! Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .