On Wed, 15 Jun 2022, Bob van der Poel wrote:
I'm looking at the Casio WK 6600 keyboard and see that the old fashioned MIDI connectors are replaced with a USB - B connector. Can anyone answer: 1. These connections are okay to connect my linux desktop computer to the keyboard using a standard USB A-B cable?
That is the intention. It should look like a midi port on your computer.
2. How long can the MIDI cable be? I suppose if it's too short I could always insert an extension cable?
Assuming you really mean USB cable and not MIDI cable, Yes. Maximum cable length USB-IF Standard is 5m (16.4 feet) though there are some passive cables made (Newnex for one) good for up to 10m. Beyond that you need an active USB cable... depending on what they put in there, this will work fine or it will give problems.
My personal thought would be to keep things as short as needed remembering that you want real time, accurate (no dropouts) data transfer. A missed note is annoying, a wrong note, or garbled cc/program change is more annoying and a missed note off could be really annoying. I don't know if flaky USB would show up that way or if the USB connection shows a broken more easily.
3. Could I use a real MIDI cable from the computer and convert that to USB?
First thought is "don't go there" The keyboard is a client not a host and you would need a small computer to act as that host and use it's serial i/o as MIDI. The MIDI data would have to be stored and resent, collecting latency along the way.
-- Len Ovens www.ovenwerks.net
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