SOMA.EXE is a Windows version of Som-A for PC.

In order to run Som-A copy the entire "Soma" directory from the CDROM 
onto your HD.

When using Soma.exe for the first time, you must select File -> Define
Work Directories in order to set the paths and the directories for 
Soma.exe, Charts, and Signals. For example, if you copied the Soma
directory onto the root of drive C: then you should specify the 
directories as follows (you can ignore STR and VOC for the moment):

WSOM-A = c:\soma\
CAR = c:\soma\charts\
WAV = c:\soma\signals\

Then click OK and the system will create a file called Soma.cfg. 

Som-A displays the waveforms as the samples are generated. 
If your computer has a SoundBlaster card, then it is possible to 
interrupt and play the sound without halting the synthesis process.