ChannelPitch

ChannelPitch

Command Index · BlitzBasic · Audio

ChannelPitch:Void channel:Int32, pitch:Int32

Parameter	Mode	Type	Default	Description
channel	In	Int32	required	A channel handle from PlaySound.
pitch	In	Int32	required

Description

Changes the speed and the pitch of a channel that is playing or paused. The value is a sampling frequency in hertz: take the frequency of the sound as the middle value, so a 22050 Hz sound that is set to 44100 plays twice as fast and an octave higher.

Differences

• Changing the pitch also changes the speed, because the sound is resampled. There is no way to keep the speed.
• A debug build (-d) stops the program when the channel was never given out. A channel that is over is fine everywhere, see Debug handle checks.

Examples

; MakeBeep writes beep.wav, see the LoadSound example for the code.
Local snd = LoadSound("beep.wav")
LoopSound snd
Local ch = PlaySound(snd)
For f = 11025 To 44100 Step 1000
	ChannelPitch ch, f
	Delay 40
Next
StopChannel ch

Related Commands

ChannelPan, ChannelPlaying, ChannelVolume, PauseChannel, ResumeChannel, SoundPitch, StopChannel

Command Index · BlitzBasic · Audio