asoundrc for multitrack recording

.asoundrc files for multitrack recording in audacity etc from common, say, usb sound devices (microphones, amps).

This creates a sound device called "multi" that has 6 tracks: 2 for regular sound card, 2 for amp1, 2 for amp2.

Or 2 for reg sound card, 2 for usb mic, 2 for amp1.

With the usb devices all connected to the same usb hub (say on a laptop) if you use more than mic + amp there will be overruns and crash.

I guess you need to use multiple USB PCI cards and connect 1 device into each.

Or use multiple sound cards.
Either way these configs can show you how to
get everything merged together working multitrack concurrently in Gnu/Linux.

USB guitar amps need more work to get working as they are only capture, and thus the fake extra stuff is needed, you'll see in the configs.

These are posted so you can know how to do this too.