Likely due to cost issues with regards to the 20meg crystal... Also, wouldn't your timing be seriously altered if you ran the same sketch from an atmega running at 16meg on one running at 20?
I have had zero issues so far chaining three controllers together with the head controller receiving and passing through the signals from two different midi sources. Each one has at least 2 or 3 varying multiplexers (4051's 21's 595's etc).
The only time I have encountered issues is when I try my first ever controller that has a hacked apart synaptics touchpad built into it and two rotary encoders. If I enable the touchpad (which uses the ps2 protocol) it causes the encoders to become a little jittery... I'm sure there's a way (either in hardware or software) to work around it, but I haven't really bothered taking it any further since I don't really use the xypad that much right now...
My ideal controller will have one per deck, so I'm going to have to figure it out eventually
I've seen that .net board.. but the first time i saw the ".NET" part, I kinda threw up in my mouth a little...
I have a deep down hate of any and all msft products and use them as little as i can (heh, that's coming from a IT admin managing a couple dozen ms servers
)
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