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msowenks / siphon

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Inbound audio gain stuck at max #55

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Make a call
2. Listen to the inbound audio - it's too loud, a little distorted and
can't be turned down.

What is the expected output? What do you see instead?
If the volume must be fixed, it should at least not be overly loud and
distorted.

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

Please provide any additional information below.

When in a call, the iphone volume control has no effect.
Again, I can run Truphone for comparison and call the same number.  The
handset volume is lower, not distorted and can be adjusted.

Original issue reported on code.google.com by dblac...@gmail.com on 14 Oct 2008 at 1:13

GoogleCodeExporter commented 9 years ago 
iphone firmware is 2.1

Original comment by dblac...@gmail.com on 14 Oct 2008 at 1:16

GoogleCodeExporter commented 9 years ago 
I'm surprised because on my iPhone the volume control works fine.

Original comment by samuelv0...@gmail.com on 14 Oct 2008 at 10:29

GoogleCodeExporter commented 9 years ago 
I tried it again and the volume control is indeed working (?) but the sound is
distorted at all volume levels.

Attached are two audio files to show this by calls to my LAN Asterisk echo 
service. 
The input gain to the computer sound card was adjusted so the loudest iphone
headphone volume setting with Siphon output would not clip.  For each one I 
start at
50% iphone headphone volume, ramp up to 100% then back down to 50%.   The first
sample is Siphon, and the second was done immediately afterwards with Truphone, 
and
no change to computer input audio settings.

Note how the Siphon audio is always clipped (i.e. look at waveform in a 
graphical
audio viewer), and Truphone audio is not clipped even when headphone volume is 
at 100%. 

Perhaps when you decode (and maybe encode too?) to ulaw there may be a math 
error or
something else feeding clipped digital audio values to the iphone hardware.

Original comment by dblac...@gmail.com on 15 Oct 2008 at 1:01

Attachments:

GoogleCodeExporter commented 9 years ago 
With beta 8 the sound is no longer too loud and clipped - this appears to be 
fixed!

Original comment by dblac...@gmail.com on 18 Oct 2008 at 12:33

GoogleCodeExporter commented 9 years ago 
Where can I download Beta 8?

Original comment by mail%iamcarlo.net@gtempaccount.com on 7 Nov 2008 at 6:56

GoogleCodeExporter commented 9 years ago 
Siphon beta 8 and beta 9

Original comment by samuelv0...@gmail.com on 11 Nov 2008 at 4:38