Press OK after the
title display. During the performance, the keys [+] and [-] make the
performance tempo faster or slower. The last tempo choice is stored,
even if interrupting with CANCEL. Display-off performance saves the
batteries and makes the sound much nicer. The default performance takes
about 9 minutes.
On the HP49+, the screen cannot be turned off anymore. Hence, load the smaller JSBachP on this calculator.