Tandy 1000 Basic Reference Manual page 311

Chapter 10 I BASIC Keywords
SOUND Statement
SOUND
frequency,
duration[,
[uolumel [,[voice111
SOUND ON
SOUND OFF
Generates a sound with the
frequency
and
duration
specified.
When a SOUND statement is producing sound, the program con-
tinues to execute. See the PLAY statement for more information
about executing program lines during SOUND.
frequency
specifies the desired tone in Hertz, and is an integer in
the range 1 to 32767. The lowest frequency the multi-voice sound
chip can produce is 110 Hz. Any value below 110 Hz sounds at
110 Hz. The frequency 32767 is treated as the silence frequency.
To create periods of silence, use SOUND 32767,
duration.
Possible frequencies are given later.
Duration
is an integer in the range 1 to 65535, specifying the
duration in clock ticks. Clock ticks occur 18.2 times per second.
The shortest sound is 1, and the longest is 65535. If
duration
is
0, BASIC turns off any currently running SOUND statement.
Otherwise, BASIC completes the first SOUND statement before
executing the next one.
Volume
is an integer in the range 0 to 15, where 0 is the lowest
volume and 15 is the highest volume. If you omit
uolurne,
BASIC
uses 8. You must execute a SOUND ON statement t o use
uolurne.
Voice is an integer in the range 0 to 2. If you omit voice,
BASIC
uses 0. You must execute a SOUND ON statement to use voice.
You can set each voice to a different tone to produce a 3-note
chord.
SOUND ON
enables the external speaker that supports multi-
voice sounds using the PLAY or SOUND statements.
SOUND OFF disables the external speaker.
You can use SOUND with BEEP t o direct sound to either the
computer's speaker or external speaker. See also BEEP for the
results of the different combinations of BEEP and SOUND.
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