Bob Ammerman wrote:
> MIDI in and out work fine on a traditional UART. The baud rate is 31 250,
> which works out perfectly when using an crystal that is an exact number of
> MHz (as opposed to some funny number).
>
> However, rather than using conventional RS232 levels, proper MIDI uses an
> opto-isolated connection.

Bob, what's the deal with the opto-isolation? I've noticed some examples
on line have it, some don't. Do I *need* to include opto-isolation to
just get simple output, or is there some other way? And why is
necessary, ie why can't I just bring down the voltage level on the pins
to acceptable midi range using diodes or what not? ( Am very much a
beginner with electornics. I am more scared of external chips than I am
of bit banging serial i/o myself, ha ha. )

Iain

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