PLAY - a device I/O statement that plays music
 
Syntax
  PLAY commandstring
    - commandstring is a stringexpression that contains music commands:

------------------------- Set Octaves and Play Tones -------------------------
 On  Sets current octave (n = 0-6)    |  < or >  Up or down one octave
 Nn  Plays note n (n = 0-84, 0 is a   |  A-G  Plays A, B, ..., G in current
     rest)                            |      octave (+ = sharp, - = flat)
------------------------- Set Tone Duration and Tempo ------------------------
 Ln  Sets length of a note (L1 is     |  MS  Each note plays 3/4 of length
     whole note, L4 is quarter note,  |  MN  Each note plays 7/8 of length
     etc.)  n = 1-64                  |  ML  Each note plays full length
 Tn  Sets number of quarter notes per |  Pn  Pause for the duration of
     minute (n = 32-255, 120 default  |      n quarternotes (n = 1-64)
------------------------------- Set Operation --------------------------------
 MF  Plays music in foreground        |  MB  Plays music in background
------------------------------ Execute Substrings ----------------------------
       X + VARPTR$(string-expression) |   Executes another command string
 
See Also  <SOUND>  <BEEP>  <ON PLAY(N)>
Other Uses of the PLAY Keyword
  <PLAY ON, PLAY OFF, AND PLAY STOP> - to enable, disable, or suspend play
                                       event trapping
  <PLAY FUNCTION> - to return the number of notes in the background music
                    queue