From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <43DE77BA.7060406@xmission.com> From: Brad Midgley MIME-Version: 1.0 To: bluez-users@lists.sourceforge.net Subject: Re: [Bluez-users] Multi channel A2DP streaming References: <20060130200806.D2BED445F3@smtp3-g19.free.fr> In-Reply-To: <20060130200806.D2BED445F3@smtp3-g19.free.fr> Content-Type: text/plain; charset=windows-1252 Sender: bluez-users-admin@lists.sourceforge.net Errors-To: bluez-users-admin@lists.sourceforge.net Reply-To: bluez-users@lists.sourceforge.net List-Unsubscribe: , List-Id: BlueZ users List-Post: List-Help: List-Subscribe: , List-Archive: Date: Mon, 30 Jan 2006 13:31:54 -0700 Grégory > As you know the bandwidth of Bluetooth is limited, and it’s not possible > to transmit two high qualities A2DP streaming by using the SBC Codec. Is > it possible to use the MP3 codec with Bluez stack? If you have an a2dp sink that can support mp3, you will be able to fit in more or higher-quality streams. I'd guess mp3 compresses to about half the size of a comparably-lossy sbc. If you want the mp3 sink to run linux, we need your help in extending a2recv to advertise and accept mp3. It needs to do this according to the bluetooth spec. You can always change the compression parameters. With high-quality sbc settings I think about 400kbps is used up. Two streams will fit if you reduce the quality settings. The difference in quality may not be that noticable with the cheap earphones most people are using with portable headsets. Giving a2play more '-t' flags will make it use lower quality settings, but I need to change it so it doesn't switch to 4 subbands. Victor figures 4 subbands uses more bandwitch than 8. > Do you know, how many high quality audio fluxes in parallel it’s > possible to have with a BT V1.2 and a BT V2 EDR module? But are the a2dp sink devices running edr? Brad ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users