Return-Path: Message-ID: <46f855150805010641q1e164d86h46d2bc8352d6ed37@mail.gmail.com> Date: Thu, 1 May 2008 09:41:19 -0400 From: "Chris Carlin" To: "BlueZ users" In-Reply-To: <4818E1B3.6000900@powercraft.nl> MIME-Version: 1.0 References: <48171A58.8060200@powercraft.nl> <4817DAE3.6050406@gmail.com> <4818E1B3.6000900@powercraft.nl> Subject: Re: [Bluez-users] step by step - how to get your bluetooth stereo headset fully working with the bluez software stack under linux Reply-To: BlueZ users List-Id: BlueZ users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1576961370==" Sender: bluez-users-bounces@lists.sourceforge.net Errors-To: bluez-users-bounces@lists.sourceforge.net --===============1576961370== Content-Type: multipart/alternative; boundary="----=_Part_6423_20824433.1209649280161" ------=_Part_6423_20824433.1209649280161 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline I use Motorola S805 headphones as well. a2dp is so much better now than it was a year or so ago that I've been somewhat happily living with it. On Wed, Apr 30, 2008 at 5:16 PM, Jelle de Jong wrote: > I got some kind of bandwidth issue with bluez. When I use my bluetooth > headset and mouse at the same time, the audio gets interrupted. Both > devices are master connections, if the headset is connected as slave, > the connection is totally unusable, every other bluetooth event will > make the audio stop in this case. > - So how can we fix the bandwidth priority/distribution system with bluez? To add my experiences, audio only drops out when using other bluetooth devices connected to the same computer. That is, I can use bluetooth in the vicinity without interference, so it doesn't seem to be an over-the-air thing. Also, I see the problem with my bt keyboard: even pressing a single key can cause a drop while moving the mouse normally takes a couple of seconds to mess up the audio. I suspect this has something to do with changing connection state, but I don't actually know. Also, the problem is far, far worse with high quality music than, say, a poor quality book on tape. I almost never have a problem listening to voice but always when listening to symphonic music. Perhaps it's compressibility? I use both audacious and mplayer with identical results. My system is very different from Jelle's: I have a low latency kernel with upped jiffies and all that... it's gentoo-sources. Maybe observations on the very different system will provide some clues. ~Chris ------=_Part_6423_20824433.1209649280161 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline I use Motorola S805 headphones as well. a2dp is so much better now than it was a year or so ago that I've been somewhat happily living with it.

On Wed, Apr 30, 2008 at 5:16 PM, Jelle de Jong <jelledejong@powercraft.nl> wrote:

I got some kind of bandwidth issue with bluez. When I use my bluetooth
headset and mouse at the same time, the audio gets interrupted. Both
devices are master connections, if the headset is connected as slave,
the connection is totally unusable, every other bluetooth event will
make the audio stop in this case.
- So how can we fix the bandwidth priority/distribution system with bluez?

To add my experiences, audio only drops out when using other bluetooth devices connected to the same computer. That is, I can use bluetooth in the vicinity without interference, so it doesn't seem to be an over-the-air thing. Also, I see the problem with my bt keyboard: even pressing a single key can cause a drop while moving the mouse normally takes a couple of seconds to mess up the audio. I suspect this has something to do with changing connection state, but I don't actually know.

Also, the problem is far, far worse with high quality music than, say, a poor quality book on tape. I almost never have a problem listening to voice but always when listening to symphonic music. Perhaps it's compressibility?

I use both audacious and mplayer with identical results.
My system is very different from Jelle's: I have a low latency kernel with upped jiffies and all that... it's gentoo-sources. Maybe observations on the very different system will provide some clues.

~Chris

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