Outbound audio discontinuous

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Call my LAN asterisk server's echo test (*43)
2. Talk and/or listen to return audio
3. Hear return audio come through in ~0.75 sec bursts with equal silent
pauses between

What is the expected output?
Continuous audio.

What version of the product are you using? On what operating system?
Siphone beta 7 on iphone 3G 2.1 over wifi

Please provide any additional information below.

I can quit out of Siphon, run Truphone and perform the same test - perfect
audio there.  Siphon is negotiating a ulaw channel with my asterisk server.

Inbound audio, e.g. the echo test canned introduction, sounds fine albeit
too loud and distorted (another issue).  This points to upstream audio
being the problem.

Original issue reported on code.google.com by dblac...@gmail.com on 14 Oct 2008 at 1:10

[GoogleCodeExporter]

I tried rebooting the iphone and it still does the same thing.

Original comment by dblac...@gmail.com on 14 Oct 2008 at 1:17

[GoogleCodeExporter]

More on this: it appears to have to do with echo cancellation and maybe the
overvolume problem reported as another issue.  If the iphone receive audio is 
turned
up, the 0.75 sec cycle occurs during the echo test.  If I turn it down, the 
received
audio is continuous but I still hear quite a bit of short echo and when 
speaking a
loud word the received audio will cut out again for a short time.

It could be solving the other issue will take care of this one too.

Original comment by dblac...@gmail.com on 15 Oct 2008 at 12:17

[GoogleCodeExporter]

To explain a little further, the cycling appears to have been from the 
background
noise being loud enough to cause the AEC to mute the receive audio, unmute it 
after a
time, and so forth.

When turning down the volume a little, I'm able to make the receive audio mute
altogether for around 0.4-0.7 sec just by talking loudly.

Original comment by dblac...@gmail.com on 16 Oct 2008 at 10:45

[GoogleCodeExporter]

With beta 8 the audio is good now, but the echo canceller still seems to be too
aggressive.  This shows by cutting portions of syllables out of words.  By the 
lack
of background noise I can hear it gating the audio on and off.   The issue is 
less
pronounced than when the audio was clipping with beta 7 but is still there.

This is both using the Asterisk echo service and calling another SIP phone on 
my LAN
(regular phone connected to a Linksys ATA).  The AEC behavior seems the same.

Original comment by dblac...@gmail.com on 18 Oct 2008 at 12:37

[GoogleCodeExporter]

Dito with PSTN : Interrupted outbound sound
1. Call a PSTN number
2. Person called said me that sound is interrupted
3. I heard a perfect sound

What version of the product are you using? On what operating system?
beta 8 firmware 2.1 freephonie.net

Please provide any additional information below.
I try to call him twice : bad. The person call me instead me : again
interrupted. I decide to use Symphonie on my powerbook the sound is perfect !

Original comment by benoit.d...@gmail.com on 19 Oct 2008 at 8:07

[GoogleCodeExporter]

With Beta 7 & 8 dito.

Outbound sound is interrupted. (beta 8: On/ off all 0,25 Sec.) 
I self heard a perfect sound on my iPhone of incomming Sound.

Original comment by PatrScha...@googlemail.com on 20 Oct 2008 at 10:11

[GoogleCodeExporter]

Original comment by samuelv0...@gmail.com on 21 Oct 2008 at 8:13

• Changed state: Accepted