Thanks for taking the time do this analysis and share the results!
The Ekiga output is definitely showing a filtered response. The only filter in the audio chain is the Automatic Echo Cancellation - did you have that enabled when doing the measurements?
This would certainly explain the output. Craig On 5/05/2013 6:49 AM, geo cherchetout wrote:
Hello, Using Ekiga v.3.9.90 and the line input of his soundcard, and PCMA codec, Foo sends white noise to Bar who receives and records this sound with Linphone v.3.5.99.0. (Recent versions of Linphone make recording easy, the recorded sound being extracted from rtp streams, not from soundcard.) Then, using Audacity, Bar displays the spectrum of the recorded sound. You can see it here: http://pix.toile-libre.org/?img=1367698438.png Now, the same experiment is made with Foo and Bar using the same Linphone v.3.5.99.0 softphone, and the spectrum is much better as you can see there: http://pix.toile-libre.org/?img=1367698567.png Perhaps there is something like a wrong equation in Ekiga's or some library's code ? Or this is a feature and not a bug ? I am able to compile Ekiga but not to modify the code by myself... _______________________________________________ ekiga-list mailing list ekiga-list@gnome.org https://mail.gnome.org/mailman/listinfo/ekiga-list
-- ----------------------------------------------------------------------- Craig Southeren Post Increment – VoIP Consulting and Software cra...@postincrement.com.au www.postincrement.com.au Mobile: +61 417231046 G+: craig.southe...@gmail.com US: +1 415 800 4201 MSN: craig_southe...@hotmail.com "Science is the poetry of reality." Richard Dawkins _______________________________________________ ekiga-list mailing list ekiga-list@gnome.org https://mail.gnome.org/mailman/listinfo/ekiga-list