SOUND
=====

Function
--------

**SOUND** generates a note of a specified frequency and length.

Syntax
------

SOUND pitch,duration.

Example
-------

::

   SOUND 121,530

This will produce a middle 'C note for one second.

The following program will play a short tune:

::

   10 FOR 1=1 TO 20
   20 SOUND 52, 1233/I
   30 SOUND 46, 1394/I
   40 SOUND 59,1086/I
   50 SOUND 121,530/I
   60 SOUND 80,1202/I
   70 FOR J=I TO 16
   80 NEXT J
   90 NEXT I
   99 END

Remark
------

Pitch and duration must be in the range 1 - 65,534.

A higher value for pitch will produce a lower note.

A higher value for duration will Increase the length of the note.

The formula, 64130/pitch, can be used to find the required ’duration'
parameter to play a note of a specified pitch for one second.

See :doc:`../appendix/four-octave-sound-range`
for parameters to generate specific notes of required frequency.