Hi, I'd like to try using a good quality microphone and a set of PC speakers (in the first instance) to create a powerful speakerphone; if I get that working, I'll probably try more elaborate audio equipment.
For this to work, I'll need software acoustic echo cancellation, or the caller at the other end will constantly hear his/her voice echoing back. I gather Asterisk can do very good software echo cancellation, but I can see no reference to using it with chan_console (using the Alsa driver). Am I overlooking something obvious, or is that really not implemented? If not, I guess I'll have to try Linphone, as I hear it does pretty good acoustic echo cancellation (it uses the code from the Speex library, I believe). that's not an ideal solution, though, as the two would be running on the same machine (I'd have to recompile Linphone to use a different port for SIP, or else tell Asterisk to do so). In addition, I've tried using 'dial' from the Asterisk console while a call from the console is already established, hoping that this would send DTMF signals. So far those signals haven't been received at the other end, while I've had no trouble sending DTMF from a Windows softphone via the same Asterisk box. If all this isn't promising, is there a better way to combine a line out socket, a mic in socket and either software or hardware acoustic echo cancellation? I'm not very familiar with the hardware options around for Asterisk, but it strikes me that this would be a fairly obvious thing to do.... I haven't come across a hardware speakerphone which allows you to replace its own speaker and mic with line out and mic in sockets, but if there is such a thing, I suppose that connecting it to an FXS socket might be a sensible way forward. Any help much appreciated! Best wishes, Nikhil. _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users