V1[]
Indications are, BEEP in SmileBasic V1 is identical to that in V2.
V2[]
BEEP is a command which plays a simple sound. It can take up to 4 numerical parameters, each of which gets rounded down if it is not an integer.
The first parameter is 0 by default. It represents what kind of sound is generated by the command. See the List of Preset Sound Effects.
The second parameter is the pitch, and is 0 by default. The sound generated can be lowered in pitch by up to 2 octaves (represented by a value of -8192), or raised in pitch by up to 2 octaves (represented by a value of 8192).
The third parameter is the volume, and is 127 by default. 0 represents no sound, and 127 represents the loudest possible.
The fourth parameter represents the left-right balance, and is 64 by default. A value of 0 means the sound will play mostly on the left speaker, and a value of 127 means the sound will play mostly on the right speaker. 64 represents equal volume on both speakers.
Thus, the command BEEP is equivalent to BEEP 0,0,127,64.
V3[]
No information on SmileBasic V3.