On 05/25/2012 09:52 AM, Liviu Andronic wrote: > Hello > > > On Fri, 25 May 2012 13:52:52 +0200, Dragos D <[email protected]> wrote: > >> Hi, I am not sure what you mean by jitter. Do you mean discontinuities >> when >> hearing the other party, or the way they hear you? >> > Well, for now I've only tested using the iptel.org 'music' and 'echo' > services. Currently using 'GSM' codec and 3G. > > When testing 'music', especially in the first ~10sec, I get intermittent > scratching noises inserted. (Analogous to electrical discharges? Or > perhaps to ancient vinyl discs?) I'm not sure how else to describe them. > I don't get them in MizuDroid. > > I'm wondering though if that's due to the complexity of the stream in > 'music'. I've tested also with 'echo', talking like a fool to myself, > and I no longer get these jitters. So maybe this is all a false alarm. > > >> Could you use headphones and disable both the echo limiter and the echo >> cancellation and let me know how it behaves? >> > I've disabled both and plugged in decent headphones: I still get the > jitters in 'music'. And seemingly no issues with 'echo'. > > > Two questions: Is 'GSM' the code that I should prefer (as in: the > optimal codec) for 3G? And is it possible to record SIP calls? I can use > 'vrecorder' to record regular phone calls, but I'm not sure how I could > do this for Linphone or MizuDroid. > > Cheers > Liviu > > _______________________________________________ > Linphone-users mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/linphone-users > If you are using DSL you may get that if the filter is poor. I had that problem for a heart pacer tests. I could not use home phone for it but voip worked well. Bob R
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