qb45advr.hlp (Topic list)
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PLAY Statement Details - Octave and Tone
  Details   Octave and Tone   Duration   Operation   Substrings
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Octave and Tone Commands
 
  Octave     Action
  O n        Sets the current octave. There are seven octaves, numbered 0-6.
  >          Increases octave by 1. Octave cannot go beyond 6.
  <          Decreases octave by 1. Octave cannot drop below 0.
 
  Tone       Action
  A-G        Plays a note in the range A-G. The "#" symbol or the "+"
             symbol after a note specifies sharp; a "-" specifies flat.
  N n        Plays note n. The range for n is 0-84 (in the seven possible
             octaves, there are 84 notes); n = 0 means a rest.
 
  Suffixes   Action
  # or +     Follows a specified note and turns it into a sharp.
  -          Follows a specified note and turns it into a flat.