Hi,
I am working on a project where it would be desirable to have audio
streams going to more than one SCO audio device at a time. My quick test
today of playing a WAV file with mplayer to two different devices didn't
work and bluetoothd was reporting "connection refused" when I tried to
get the second stream going. Once the first playback finished, I was
able to then play to the second device.
So, I suppose m question is if BlueZ supports audio to multiple SCO
devices at the same time? If not, what might be involved in making it work?
Thanks,
-d
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Oops. I forgot to mention that this is with BlueZ 4.13.
-d
deker wrote:
> I've changed the MaxConnections setting and now I'm seeing something
> different (this must mean I'm getting closer :)
>
> I'm using the following config/comandline to play audio:
>
> audio.conf:
> [General]
> SCORouting=PCM
> [Headset]
> HFP=False
> MaxConnections=2
>
> ~/.asoundrc:
>
> pcm.bluetooth {
> type bluetooth
> device 00:0B:2E:D5:27:DA
> profile auto
> }
> pcm.bluetooth2 {
> type bluetooth
> device 00:0B:2E:D4:EC:31
> profile auto
> }
>
> mplayer command lines:
>
> mplayer -ao alsa:device=bluetooth test.wav
> mplayer -ao alsa:device=bluetooth2 test.wav
>
> Either execution of mplayer works properly as long as the other isn't
> streaming to the device. If one is already running, mplayer reports the
> following:
>
> [AO_ALSA] alsa-lib: pcm_bluetooth.c:464:(bluetooth_hsp_hw_params)
> BT_SETCONFIGURATION failed : Input/output error(5)
> [AO_ALSA] Unable to set hw-parameters: Input/output error
> Could not open/initialize audio device -> no sound.
> Audio: no sound
> Video: no video
>
>
> Exiting... (End of file)
>
> Also, it seems that I'm losing the beginning of the sample in playback.
> I assume this is due to the delay of setting up the connection to the
> headset, but I was wondering if there was a way to avoid this.
>
> Thanks,
>
> -d
>
>
>
>
> Johan Hedberg wrote:
>
>> On Mon, Nov 03, 2008, deker wrote:
>>
>>
>>> I am working on a project where it would be desirable to have audio
>>> streams going to more than one SCO audio device at a time. My quick test
>>> today of playing a WAV file with mplayer to two different devices didn't
>>> work and bluetoothd was reporting "connection refused" when I tried to
>>> get the second stream going. Once the first playback finished, I was
>>> able to then play to the second device.
>>>
>>> So, I suppose m question is if BlueZ supports audio to multiple SCO
>>> devices at the same time? If not, what might be involved in making it work?
>>>
>>>
>> If you're using BlueZ 4.17 or later you'll need to add something like
>> MaxConnections=2
>> to the [Headset] section in /etc/bluetooth/audio.conf to be able to
>> create a service level connection to more than 1 device.
>>
>> Johan
>>
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>>
>
>
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I've changed the MaxConnections setting and now I'm seeing something
different (this must mean I'm getting closer :)
I'm using the following config/comandline to play audio:
audio.conf:
[General]
SCORouting=PCM
[Headset]
HFP=False
MaxConnections=2
~/.asoundrc:
pcm.bluetooth {
type bluetooth
device 00:0B:2E:D5:27:DA
profile auto
}
pcm.bluetooth2 {
type bluetooth
device 00:0B:2E:D4:EC:31
profile auto
}
mplayer command lines:
mplayer -ao alsa:device=bluetooth test.wav
mplayer -ao alsa:device=bluetooth2 test.wav
Either execution of mplayer works properly as long as the other isn't
streaming to the device. If one is already running, mplayer reports the
following:
[AO_ALSA] alsa-lib: pcm_bluetooth.c:464:(bluetooth_hsp_hw_params)
BT_SETCONFIGURATION failed : Input/output error(5)
[AO_ALSA] Unable to set hw-parameters: Input/output error
Could not open/initialize audio device -> no sound.
Audio: no sound
Video: no video
Exiting... (End of file)
Also, it seems that I'm losing the beginning of the sample in playback.
I assume this is due to the delay of setting up the connection to the
headset, but I was wondering if there was a way to avoid this.
Thanks,
-d
Johan Hedberg wrote:
> On Mon, Nov 03, 2008, deker wrote:
>
>> I am working on a project where it would be desirable to have audio
>> streams going to more than one SCO audio device at a time. My quick test
>> today of playing a WAV file with mplayer to two different devices didn't
>> work and bluetoothd was reporting "connection refused" when I tried to
>> get the second stream going. Once the first playback finished, I was
>> able to then play to the second device.
>>
>> So, I suppose m question is if BlueZ supports audio to multiple SCO
>> devices at the same time? If not, what might be involved in making it work?
>>
>
> If you're using BlueZ 4.17 or later you'll need to add something like
> MaxConnections=2
> to the [Headset] section in /etc/bluetooth/audio.conf to be able to
> create a service level connection to more than 1 device.
>
> Johan
>
> -------------------------------------------------------------------------
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On Mon, Nov 03, 2008, deker wrote:
> I am working on a project where it would be desirable to have audio
> streams going to more than one SCO audio device at a time. My quick test
> today of playing a WAV file with mplayer to two different devices didn't
> work and bluetoothd was reporting "connection refused" when I tried to
> get the second stream going. Once the first playback finished, I was
> able to then play to the second device.
>
> So, I suppose m question is if BlueZ supports audio to multiple SCO
> devices at the same time? If not, what might be involved in making it work?
If you're using BlueZ 4.17 or later you'll need to add something like
MaxConnections=2
to the [Headset] section in /etc/bluetooth/audio.conf to be able to
create a service level connection to more than 1 device.
Johan
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Speech quality is all we need. If I can get 2 8Khz output streams going
to 2 devices and 1 8Khz input stream from one device I'll be happy.
If somebody can point me in the right direction I'd really appreciate it.
Thanks,
-d
Marcel Holtmann wrote:
> Hi,
>
>
>> I am working on a project where it would be desirable to have audio
>> streams going to more than one SCO audio device at a time. My quick
>> test
>> today of playing a WAV file with mplayer to two different devices
>> didn't
>> work and bluetoothd was reporting "connection refused" when I tried to
>> get the second stream going. Once the first playback finished, I was
>> able to then play to the second device.
>>
>> So, I suppose m question is if BlueZ supports audio to multiple SCO
>> devices at the same time? If not, what might be involved in making
>> it work?
>>
>
> do you wanna do speech quality or CD quality audio streaming?
>
> And yes, BlueZ does support it, but there are limitations from the
> Bluetooth radio. So you really need to know what you wanna do.
>
> Regards
>
> Marcel
>
>
> -------------------------------------------------------------------------
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> [email protected]
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>
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Hi,
> I am working on a project where it would be desirable to have audio
> streams going to more than one SCO audio device at a time. My quick
> test
> today of playing a WAV file with mplayer to two different devices
> didn't
> work and bluetoothd was reporting "connection refused" when I tried to
> get the second stream going. Once the first playback finished, I was
> able to then play to the second device.
>
> So, I suppose m question is if BlueZ supports audio to multiple SCO
> devices at the same time? If not, what might be involved in making
> it work?
do you wanna do speech quality or CD quality audio streaming?
And yes, BlueZ does support it, but there are limitations from the
Bluetooth radio. So you really need to know what you wanna do.
Regards
Marcel
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