In multi-track recording, those tracks that are recorded first. In general, the rhythm tracks (guitars, bass, drums, et al).
"Ok then...excellent news that another batch has been completed. I am sorry though that some of the wires were not so easy to transfer, but I appreciate your descriptions of how/why this is the case. In addition, I understand why some wires required their own DC, because they are long, as opposed to putting two wires onto one CD. Thank you also ..."