Asterisk voice changer

[voicechange]
exten=>100,1,Set(PITCH_SHIFT(both)=1.5) ;
exten=>100,2,Playback(demo-thanks)

exten=>200,1,Set(PITCH_SHIFT(both)=1.5) ;
exten=>200,2,dial(SIP/rapidvox/18292363985)


https://wiki.asterisk.org/wiki/display/AST/Function_PITCH_SHIFT

PITCH_SHIFT()

Synopsis

Pitch shift both tx and rx audio streams on a channel.

Description

Examples:

exten => 1,1,Set(PITCH_SHIFT(tx)=highest); raises pitch an octave

exten => 1,1,Set(PITCH_SHIFT(rx)=higher) ; raises pitch more

exten => 1,1,Set(PITCH_SHIFT(both)=high) ; raises pitch

exten => 1,1,Set(PITCH_SHIFT(rx)=low) ; lowers pitch

exten => 1,1,Set(PITCH_SHIFT(tx)=lower) ; lowers pitch more

exten => 1,1,Set(PITCH_SHIFT(both)=lowest) ; lowers pitch an octave

exten => 1,1,Set(PITCH_SHIFT(rx)=0.8) ; lowers pitch

exten => 1,1,Set(PITCH_SHIFT(tx)=1.5) ; raises pitch

Syntax

PITCH_SHIFT(channel direction)

Arguments

• channel direction - Direction can be either rx, tx, or both. The direction can either be set to a valid floating point number between 0.1 and 4.0 or one of the enum values listed below. A value of 1.0 has no effect. Greater than 1 raises the pitch. Lower than 1 lowers the pitch.
  The pitch amount can also be set by the following values
  • highest
  • higher
  • high
  • low
  • lower
  • lowest