[Os Miridium]

Now I moved the DAC over to a USB 2.0 port. Still no

audio1 at uaudio0

Here is the new $ dmesg | grep audio

audio0 at azalia1
uaudio0 at uhub3 port 5 configuration 1 interface 0 "Focusrite Scarlett 2i4 USB" rev 2.00/1.25 addr 2
uaudio0: audio descriptors make no sense, error=4
uaudio1 at uhub3 port 5 configuration 1 interface 3 "Focusrite Scarlett 2i4 USB" rev 2.00/1.25 addr 2
uaudio1: audio descriptors make no sense, error=4

I do have the /dev/audio1 file, so that can't be it. This is my $ ls /dev | grep audio

audio
audio0
audio1
audio2
audioctl
audioctl0
audioctl1
audioctl2

The Midi-section of the Multimedia FAQ mentions that

The output of the keyboard can be connected to the input of the synthesizer, as follows:

$ cat -u < /dev/rmidi0 > /dev/rmidi1

I have a shadow of an inkling that that may be the method of connecting the device that I am looking for. If so, then the question is: Which file do I cat into which?

Thanks,
Os