As always, I decided a month in advance which piece each student would play, in consultation with that student. (Ideally, the piece is already well-learned and memorized by that point.) I gave the full list of everyone's pieces to Ben the pianist three weeks before the recital, which was May 2. He recorded the accompaniment parts with a high-quality mic and had them back to me within a week. I immediately sent each track to each parent and student to download. MP4 tracks aren't actually huge files; in some cases I simply texted the track to the parent and that worked just fine!