Controlling the Duration and Pitch of the Beep

You can also control the duration and pitch of the beep under some operating systems by using the beep function, beep_vv():

`void beep_vv(hsec, freq)`
`int hsec;`	`/* Duration of beep in hundredths of a second`	`*/`
`int freq;`	`/* Pitch of beep in hertz`	`*/`

For operating systems that do not support variable beeps, specifying both a pitch and duration greater than 0 causes the standard bell to ring.

To simplify setting the pitch and duration of the beep, the following defined values for duration are provided:

BPSHORT	3 (for 3/100's of a second)
BPMEDIUM	10 (for 10/100's of a second)
BPLONG	30 (for 30/100's of a second)
BPBELL	Produces a tone exactly like bell_vv()
OFF	0/100's of a second

The following defined values for pitch are provided:

BPLOW	100 hertz
BPMIDDLE	500 hertz
BPHIGH	1,000 hertz
BPBELL	Produces a tone exactly like bell_vv()
OFF	Produces no tone

Specifying BPBELL for either duration or pitch will cause the standard bell to be rung. Specify OFF for either duration or pitch to turn the bell off.