[asterisk-users] background audio for inbound leg

[Tom Browning]

Is there an easy way to feed an audio file (think background music,
ever so softly) to the inbound leg of a bridged call (and not send /
mix it to the outbound leg)?


exten => blah,1,Answer()
exten => blah,2,????StartSomeAudio(foo)?????
exten => blah,3,Dial(SIP/bar)


Where the audio would continue to play to the inbound leg in addtion
to the bridged inbound audio.

Thanks in advance including any RTFM references :-)

Tom