I am a performing musician based in the UK. I have a professional home studio and have been recording and performing live in the UK, Europe and Canada for over 30 years. I have supplied banjo tracks to many artists in many countries. As part of the deal I will supply three tracks - I will supply the banjo track as a bare, unprocessed wav file as well as a mixdown of the banjo track alongside the guide track that you send to me. I'll also send the processed banjo track (usually just a tad of reverb EQ and compression). The tracks will have a short clip of the original track at the start to make it easy for you to sync the tracks.
So - you send me an MP3 of your track and any info that you'd like to add regarding the style of the track and I'll do the rest. This gig is for 30 seconds of recording. Buy additional gigs if you need more than that. If you want to check me out search YouTube for Breeze & Wilson.