Too complex for me and too much silicon. Hats off to R-Dog for pulling off what they did.

Not sure whats to make of the sound issues. I had some issues where the tracks where not thick / direct enough to the amplifier and it caused humming and distortion. Learned to pay extra for the thicker copper, wide power tracks, do ground fill in, and have as direct as possible tracks for analogue sound.

Also if you end up with a wrong value cap somewhere.... like a 681 cap instead of 680 or something like that you end up filtering the wrong frequencies out... ive had that problem too ... whoops. How you end up with the through the tin can type of sound.

Last time I looked Rochester Electronics had like 10K of the harris CVSD. I bought 100 to stash away.. i think they where $10ea tho.

*edit*
down to 7k!
https://www.rocelec.com/part/harharhc1-55564-5

looks like the Harris speech decoder chip is being emulated some how (neat). Probably why it sounds speech sounds different.

Respin the board to use the original CVSD chip instead of emulating it. The original chip is obsolete but Rochester Electronics still has like 7k of them. They are $10ea tho. Probably why R-Dog found a different solution.

https://www.rocelec.com/part/harharhc1-55564-5