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Developing a Voice Application
November 2009 58
Recording Voice
1. Prepare channel 2 to record your message:
voice -u 2 -r voice.ips
The command voice invokes the voice.c program, whose
arguments include:
The -u 2 argument selects channel 2 as the recording channel;
and the -r argument places channel 2 in record mode. Voice.ips
is the speech infopkt stream file in which to store the voice
message. The channel waits for a ring signal.
Arguments
-c num Call the given number, else wait for ring.
-f Specify record coding format; use the number of
the format or one of the following names:
adpcm
adpcm32
adpcm24
pcm_ulaw
pcm_ulaw64
pcm_ulaw48
pcm_ulaw88
pcm_alaw
pcm_alaw64
pcm_alaw48
pcm_alaw88
g723-1
g723-1-53
g723-1-63
g729-a
sx7300
sx9600
gsm_610
gsm_660
1
2
3
7
8
9
10
14
15
-l Loop forever, sending or receiving.
-n secs Specify recording time in seconds.
-p Play.
-r Record (default 10 seconds).
-u unitnum Use specified channel.