Re: [asterisk-users] Re: Monitor, MixMonitor and volume levels

2006-11-13 Thread Steve Davies 

On 11/10/06, Leo Ann Boon [EMAIL PROTECTED] wrote:

Steve Davies wrote:
 *bump*

 No suggestions at-all? Does anyone use this facility in a similar way
 and NOT have problems?
Check the gain on your ISDN interface. The monitor command doesn't
modify the volume by default. Have you tested calls via IAX to your cell?

Leo


Yes, it is strange - The gains are fine - users can hear the calls
perfectly at both ends, fax works fine etc etc - Only the recording is
odd.

I have tested this with IAX, and three different ISDN interfaces
(ISDN, Quad ISDN and Sangoma PRI) - All of them have the same symptom.

SIP to SIP is the only case that seems to work, almost as if the SIP
code is re-levelling the non-RTP stream. I think I need to try a Zap
to Zap forwarded call to see how that works...

Cheers,
Steve
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Re: [asterisk-users] Re: Monitor, MixMonitor and volume levels

2006-11-10 Thread Leo Ann Boon 

Steve Davies wrote:

*bump*

No suggestions at-all? Does anyone use this facility in a similar way
and NOT have problems?
Check the gain on your ISDN interface. The monitor command doesn't 
modify the volume by default. Have you tested calls via IAX to your cell?


Leo


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[asterisk-users] Re: Monitor, MixMonitor and volume levels

2006-11-09 Thread Steve Davies 

*bump*

No suggestions at-all? Does anyone use this facility in a similar way
and NOT have problems?

Thanks,
Steve

On 11/3/06, Steve Davies [EMAIL PROTECTED] wrote:

Hi,

I have started using the call recording facilities in Asterisk 1.2
recently, and having worked out some of the foibles regarding call
forwarding etc etc, I think I have a mostly working system.

I do still seem to have a problem with recording volume though. It
seems that all SIP call legs are recorded at normal volume, but all
my Zap (ISDN) and IAX (via Provider - ISDN) calls are recorded at a
massively reduced volume.

- It does not matter whether the call originates inside or outside the box
- It does not matter which channel is Monitored (Zap, IAX or SIP)
- The caller/callee can hear each other fine regardless of the call
source and destination.
- I also tried both Monitor and MixMonitor with the same results.
- The recording of the ISDN or IAX leg is so quiet that it is often
impossible to hear.
- SIP to SIP records 100% okay
- Recording using different codecs makes no difference
- Voicemail recording volume is fine, regardless of call source.

I considered using MixMonitor's volume settings, but cannot always
identify which channel needs a volume boost (Local channels can
obscure the call source or destination)

I can use 'sox' to modify the levels to a usable point, but this
amplifies background noise to a ridiculous degree so is not
particularly satisfactory.

Given that the call proceeds normally where is all of the volume
being lost? We generally use aLaw end-to-end (which is the codec used
on UK ISDN lines) so there should be almost no modification of the
voice packets required at-all. Why does the recording differ from the
audio being heard? I looked at the source and could see no obvious
reason!

Thanks for any pointers. I am happy to try experiments on our
development system if it helps...

Regards,
Steve


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