We have a teenag­er in our house with equal enthu­si­asm for com­put­ers and for clas­si­cal music. He brings the two togeth­er with inex­pen­sive soft­ware that allows him to tran­scribe a musi­cal score into his com­put­er, manip­u­late voice, key and tem­po, and play it back through the stereo sys­tem. The result leaves some­thing to be desired. When you have heard a Mozart piano con­cer­to syn­the­sized by a four-voice home com­put­er, it is easy to con­clude that com­put­ers and music should nev­er be allowed to mix.