Yes, she does a number of songs unaccompanied. I am hoping to upload Sovay Sovay, Lowlands of Holland, and Sorry the Day I was married soon. And Yes again, if any mudcatter could create backing tracks of suitable quality, we would be VERY interested.
By convention, channel 4 (or 16) is used for a vocal track, which can be muted. Each instrument also has its own channel.
We do use professional backing tracks for copyright material, because there is no question then over the public performance rights, but for public domain work, there is no problem (Yes, the inspectors are out, here in the UK, and looking for people using Karaoke tracks, which are NOT licenced in the same way. Anything with a fade-out is suspect)
Glad you like them, anyway. Maybe we can contribute to the next Mudcat CD, perhaps a traditional Welsh song.