Audio output through headphones sounds modulated.

[atlantiatech]

I am currently testing out different VoIP softphone clients and the 3CX client seems very well made and visually attractive.

I am experiencing one issue though. When I make a call through the softphone, the sound on my end through my headphones has a static, overmodulated sound to it.

I have confirmed the channel to my PBX (asterisk) is ulaw and I am currently using a recorded message on the PBX as my test sound file.

Other voip clients do not have this issue using the same setup/resources. I have a linksys 962 deskphone here that also doesn't show the same issue, it is only through the 3cx phone.

I recorded a test file that I can upload if need be, but the description above is fairly accurate.

Advice?

 

[leejor]

I'm taking a guess that it is probably an audio setting on your computer, or a headset issue. Have you tried any other headsets, or gone into the advanced audio settings to turn off features such as surround sound.

 

[atlantiatech]

I'm taking a guess that it is probably an audio setting on your computer, or a headset issue. Have you tried any other headsets, or gone into the advanced audio settings to turn off features such as surround sound.

I have tried multiple headsets, as my post states the audio issue only exists when using 3cx phone. Considering it's the only application and situation that does it I am pretty sure this isn't a windows or hardware issue but rather an application issue.

I can also safely rule out the PBX or codec configuration on the remote end. Per my original post I have inspected the channel during my test call (ulaw) and tested with hardware/other softphones.

I have a feeling this is a dead end for me and 3cx.

 

[SY]

As far as your information is not confirmed by other users then please provide us a capture of network traffic made using wireshark (on the PC where 3CX Phone is running). We will be glad to answer all your questions

Thanks

 

[leejor]

I have tried multiple headsets, as my post states the audio issue only exists when using 3cx phone. Considering it's the only application and situation that does it I am pretty sure this isn't a windows or hardware issue but rather an application issue.

But...have you tried running the 3CX phone, on another PC, at your location? If that doesn't have a problem, when using the original headset, then it puts the blame for the distortion on the original PC.

Others use the application without the problems you are experiencing, so it's a matter of determining what (part of the equation) is not working properly in your case. Easiest way is using the process of elimination.