Return-Path: Message-ID: <2b1fa7660611091131u19a47e37r3ff520d793930aba@mail.gmail.com> Date: Fri, 10 Nov 2006 08:31:57 +1300 From: "Thomas Kear" To: "BlueZ development" In-Reply-To: <200611091843.50711.mhilzinger@linuxnewmedia.de> MIME-Version: 1.0 References: <200611091102.54282.marcel@hilzinger.hu> <20061109104245.GB7085@physik.fu-berlin.de> <200611091843.50711.mhilzinger@linuxnewmedia.de> Subject: Re: [Bluez-devel] Quality of a2dp sound Reply-To: BlueZ development List-Id: BlueZ development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Sender: bluez-devel-bounces@lists.sourceforge.net Errors-To: bluez-devel-bounces@lists.sourceforge.net You should be able to use the command line encoding tools in their decode modes to play most formats. For example: flac -c -d [file] | aplay lame --decode [file] - | aplay oggdec -c [file] | aplay (not so sure about this one, some command switches are like flac, some aren't) Should stretch to some other formats too, wavpack springs to mind (although i can't remember its command line syntax). On 10/11/06, Marcel Hilzinger wrote: > Am Donnerstag, 9. November 2006 11:42 schrieb Adrian Glaubitz: > > Hi Marcel ! > > > > Marcel Hilzinger schrieb: > > > Hi, > > > > > > I made some tests with bluetooth stereo headsets and a2dpd. > > > I must confess, I'm impressed by the easy use of a2dpd! Thanks, it's = just > > > great. > > > > Yes, the usage is very simple, indeed. Once I figured out how to use > > passkey-agent, the connection worked immediately ;). > > > > > But I'm not impressed by the audio quality. Its quite noisy and far a= way > > > from the quality of normal wireless headphones. Headset was a Jabra > > > BT620s. I tried with different dongles, but the dongle seems to make = no > > > difference. > > > > My problem with the audio quality and a2dpd is, that the quality is set > > to telephone quality only (8kHz, Mono) though my headset can do up to > > 44,1kHz Stereo (SONY VGP-BRM1D) and a2dpd even displays 44,1kHz. When > > using a2play I can listen in 44,1kHz quality, so this is an issue with > > a2dpd for me (but a2play plays the MP3s with higher speed, so they sound > > high-pitched). Also the sound is chopped very often with a2dpd, so this= is > > no use for me at the moment :(. > > > > > Questions: > > > is this a problem of the technology? > > > > I don't think so, this is rather due to the fact that btsco is still in > > Alpha status of development. > > > > > is it a problem of bluez? > > > > No, I'd rather blame btsco. (I tried different kernel versions, 2.6.17.9 > > and 2.6.19-rc5 and the most recent bluez-utils version). > > > > > did I something wrong? > > > > Have you tried a2play instead ? Do this: > > > > - hcitool scan > > - passkey-agent
> > - btsco -r -v
> > - mpg123 --au - file.mp3 | a2play
> > Hey, thanks! I tried this once before, but it didn't work. So I gave up. = But > now it works like a charm and yes, sound quality is better. > > However, with this solution I can only play MP3 files. But most of my > collection is in OGG-Vorbis. And how to skip to next/previous track? > > > > > did anybody compare the quality on Windows? I tried to compare with M= ac. > > > But as Mac OS X cannot do a2dpd, it's even worse on Mac. > > > > I was not able to use my headset in Windows, Windows doesn't give me any > > options for choosing the headset as an audio output-device, though I can > > to the headset successfully. On 2 Macintosh Mini (Intel and PPC) with OS > > 10.4 I was able to connect to the headset without any problems, and I c= ould > > choose my headset for all the sound-output so I was able to listen to > > iTunes via the headset. The only drawback on the Mac is, that the > > quality is limited to 8000Hz, 16 Bit mono (and the Audio Utility won't > > let me choose any better quality, though the headset supports this). > Mac does not support a2dp, that's why the quality is bad. > > > -- > Mit freundlichen Gr=FC=DFen, > Marcel Hilzinger > > Linux New Media AG > S=FCskindstr. 4 > D-81929 M=FCnchen > Tel: +49 (89) 99 34 11 0 > Fax: +49 (89) 99 34 11 99 > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job ea= sier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat= =3D121642 > _______________________________________________ > Bluez-devel mailing list > Bluez-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bluez-devel > -- = Thomas Kear thomas.kear@gmail.com +6421996486 ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easi= er Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D1= 21642 _______________________________________________ Bluez-devel mailing list Bluez-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-devel