Josh, 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 :-) 73, WB4HXE On Mon, Jan 7, 2013 at 10:04 PM, Josh Koffman wrote: > On Sun, Jan 6, 2013 at 11:34 PM, Carey Fisher > wrote: > > Josh, > > Glad to see you're working on new projects that "stretch" you a bit. I'= ll > > be glad to help you design your gadget since that's the type gadget I'v= e > > been working with for 10+ years. The Left Ear/Right Ear thing is > > implemented on one of our ham products and it's pretty easy to realize > the > > functionality and flexibility without going the DSP route. > > Anyway, let me know how I can help. > > Hi Carey, > > I must admit, while I immediately connected what I was doing with what > you have done, it never even occurred to me to ask you for help! > Whoops! > > Which product are you referring to? I'd love to check it out. > > Thanks! > > Josh > -- > A common mistake that people make when trying to design something > completely foolproof is to underestimate the ingenuity of complete > fools. > -Douglas Adams > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 Carey Fisher Chief Technical Officer New Communications Solutions, LLC 678-999-3956 careyfisher@ncsradio.com --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .