I'm not sure this is the proper forum. but I recently heard a recording a student's parent made of a local student orchestra concert. The four student bassists are all students of mine and sounded great(if I do say so myself). The two things I took away from this are that phone recordings can be remarkably good quality, and that the effect of basses playing in a large hall can be very different from what we hear playing on stage. I know we know this, but to hear it from the other perspective is very useful. The various string sections were pretty balanced in terms of number of players, but the bass section sounded huge by comparison. If this had been a commercial recording I would think the basses were almost too much. The whole thing was very revealing and I will keep it in mind the next time I'm on stage myself.