This table shows the allophone lengths in milliseconds.
* spec = Timings from original datasheets (these values are totally wrong)
* calc = Timings calculated from 10kHz sample rate and the pitch/repeat values in the -AL2 ROM
* min/avg/max = Timings measured on real hardware (Amstrad SSA-1)
The min/avg/max values are slightly higher than the calculated values. This is probably because the SP0256 executes "NOPs" with repeat=1 while in standby mode, and refuses to start a new allophone until it has finished the "NOP".