Here is my challenge: A friend wants me to record her barbershop group so they can do remote practicing. She wants to record the four singers simultaneously, then burn 4 CDs with a different singer eliminated on each. In other words, [singer A] would receive the CD with [singers B, C, & D] singing the song -- then [singer A] could sing to the CD, filling in her own part. My issue -- how to isolate four woman singing together in the same room, so I can later separate them out discretely in the mix. 4 mics, 4 separate tracks... 4 SE Reflexion Filters? ($1,200 not really in my budget) Any suggestions? Am I being too overly concerned with isolating them? Would four steps back from each other and four SM58s work as well? Thanks for your help.