On Tue, Mar 10, 2020 at 1:34 PM Tom Wilson <wilso...@gmail.com> wrote:
> > Google search (aside from Model T) says some devices are tolerant of 30720. >> Some devices can be switched to non-standard 38400bps which Model T is >> exactly capable of. >> Also I wonder if there are confounding variables like flow control, and >> wiring? >> -- John. > > > There shouldn't be any issues with flow control: MIDI is about the > simplest serial interface there is: it's a 2-wire current loop. The > specification calls for 1% tolerance, so the most you can vary is 312.5bps. > That makes a maximum of 31,562.5 and a minimum of 30937.5. So 30720 is out > of spec. Devices like the Sound Canvas and Yamaha XG synths can accept data > on the serial port at 38,400, but that's a special case and based on the > firmware of the device setting its internal UART to that speed. > > Yes, I agree it's out of spec. How often it works is a different question. " Devices like the Sound Canvas and Yamaha XG synths can accept data on the serial port at 38,400, but that's a special case and based on the firmware of the device setting its internal UART to that speed. " Right. That's what I understood. Some devices specifically have a (non-standard) feature of being able to operate at 38,400 > I've been thinking about this, and what I'd probably do is use an Arduino > as a translator. You can connect the T-100 to an Arduino through a serial > connection using a simple MAX232 level converter, or your can use the > parallel port to send 8 bits at a time. From there, you can use a MIDI > shield to connect to a synthesizer. You don't need a large program; it's > basically just relaying data with a small amount of buffering. So even an > Uno can do the job. > Parallel port sounds like a good way. Who's going to be running their dot matrix and playing MIDI files simultaneously? Other issue is powering Arduino. -- John. >
