On 21/08/19 03:07, Kevin Cole wrote:
> Hi,
>
> I'm on an Arch Linux system, and now have an old Yamaha PSR-220 (TM)
> "portable keyboard" and an iConnectivity Mio (TM) MIDI to USB cable.
> My MIDI-fu is extremely limited.
>
> When I plug in the cable, it shows up (sans name) in lsusb as "Bus 001
> Device 005: ID 2321:000a"
>
> What is a good way to save keyboard stuff as .mid files and vice-versa
> (play MIDI files out to the keyboard)?

The most common way is to use a midi sequencer. There are many and of
many flavours on Linux. See here for a list:
https://wiki.linuxaudio.org/apps/categories/sequencers

Then, to 'play' with the midi keyboard (i.e. you play notes on the
keyboard and the computer generates sound), you need to use some sort of
software synthesizer. These also come in many, many flavours on Linux.
See these links for a good start:

https://wiki.linuxaudio.org/apps/categories/softsynths_and_samplers
http://linuxsynths.com/

Fluidsynth (and Qsynth as its GUI frontend) ar a good start for 'general
midi' style - using an appropriate General Midi SoundFont (many free
ones available).

Of course, the above assume your midi to usb device (and therefore
keyboard) is correctly working and 'communicating' with the software.
The two main ways are either Alsa midi or Jack midi.
Software accepting midi in and/or midi out will have to be connected
to/from the device. QjackCtl is a nice tool for managing both Jack Audio
and MIDI (both jack and alsa) connections. Opening QjackCtl's
'Connction' window or its 'Graph' window should be quite intuitive about
how this is done.

This is a short tutorial as a good starting point:
http://www.tgbates.com/linux/2016/01/11/midi-keyboard.html

And this is a much more detailed article by Ted Felix with lots of
useful information: http://tedfelix.com/linux/linux-midi.html

Hope this helps.
Lorenzo.
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