[asterisk-users] PITCH_SHIFT()

[John Jolly]

This list is a great resource and I thank all the Asterisk Guru's who
actively contribute to it.

In Leif Madsen's AstriCon 2010 talk titled "5 Things You Didn't
Know Asterisk Could
Do<https://docs.google.com/viewer?a=v&q=cache:hCDfIk4pvngJ:leifmadsen.com/sites/default/files/AstriCon%25202010%2520-%25205%2520Things%2520You%2520Didn't%2520Know%2520Asterisk%2520Could%2520Do.pdf+asterisk+dialplan+func+PITCH+SHIFT&hl=en&gl=us&pid=bl&srcid=ADGEEShzSRqJl26lEybK-TvxHL4hKQrd-mBpAapRV6eyI8ST0E5AosCEqp2bm_h5eORZFwwEZDqzEKpT9Fg244nkCgX4BDEGL6bik4Non5_fgm62fzrBxyIXjm1hnqJx2-yGyVlbdXKd&sig=AHIEtbQ2NyYajUzeJshmWKAgZEi0RprNjQ&pli=1>"
he
mentions that the PITCH_SHIFT() function is designed to be used dynamically
and can change the pitch of a channel on the fly using features.conf. Can
someone provide me with any information of how this would be accomplished
for dynamic use? I'm familiar with the dialplan syntax use examples such as:

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

and so forth, but don't understand how these functions would be called
dynamically from features.conf.

any help is greatly appreciated...
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