[Bluez-devel] a2dp and multiple headsets

[Bluez-devel] a2dp and multiple headsets

[JP Freeley (GMAIL-NYC)]

Pardon me if a FAQ or OT...

Is there a limit as to how many simultaneous headsets can be streaming 
audio?
Does anyone have suggestions about configurations, hardware, software to 
stream to multiple headsets?
I'm looking to "broadcast" stream to about 35 headsets simultaneously.

Thanks,

jpf

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Re: [Bluez-devel] a2dp and multiple headsets

[Brad Midgley]

JP

the a2dp spec has no provisions for broadcast and there are piconet size
limits to deal with anyway. You'd have to set up multiple bluetooth
adapters to really stack in the headsets but you'd never reach 35. You
may want to try a more traditional RF broadcast.

Brad

> Pardon me if a FAQ or OT...
> 
> Is there a limit as to how many simultaneous headsets can be streaming 
> audio?
> Does anyone have suggestions about configurations, hardware, software to 
> stream to multiple headsets?
> I'm looking to "broadcast" stream to about 35 headsets simultaneously.
> 
> Thanks,
> 
> jpf
> 
> -------------------------------------------------------------------------
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Re: [Bluez-devel] a2dp and multiple headsets

[JP Freeley (GMAIL-NYC)]

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Brad --

That were my research was pointing me, but I was told that something had 
been done in Amsterdam....but the details I have are about that vague. I 
figured this list would have the definitive answers.

Am I correct that in some profiles (i.e. OPP, FTP, SPP) 1 BT device can 
make upto 7 simultaneous connections?

thanks,

jpf

Brad Midgley wrote:
> JP
>
> the a2dp spec has no provisions for broadcast and there are piconet size
> limits to deal with anyway. You'd have to set up multiple bluetooth
> adapters to really stack in the headsets but you'd never reach 35. You
> may want to try a more traditional RF broadcast.
>
> Brad
>
>   
>> Pardon me if a FAQ or OT...
>>
>> Is there a limit as to how many simultaneous headsets can be streaming 
>> audio?
>> Does anyone have suggestions about configurations, hardware, software to 
>> stream to multiple headsets?
>> I'm looking to "broadcast" stream to about 35 headsets simultaneously.
>>
>> Thanks,
>>
>> jpf
>>
>> -------------------------------------------------------------------------
>> 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 easier.
>> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
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>> _______________________________________________
>> Bluez-devel mailing list
>> Bluez-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>>     
>
>
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>   

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Re: [Bluez-devel] a2dp and multiple headsets

[Brad Midgley]

JP

> Am I correct that in some profiles (i.e. OPP, FTP, SPP) 1 BT device can 
> make upto 7 simultaneous connections?

OPP etc are all point-to-point profiles. You may have heard that one 
master device can have 7 slaves in its piconet.

Brad

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Re: [Bluez-devel] a2dp and multiple headsets

[JP Freeley (GMAIL-NYC)]

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got it .. thanks again.

jpf

Brad Midgley wrote:
> JP
>
>   
>> Am I correct that in some profiles (i.e. OPP, FTP, SPP) 1 BT device can 
>> make upto 7 simultaneous connections?
>>     
>
> OPP etc are all point-to-point profiles. You may have heard that one 
> master device can have 7 slaves in its piconet.
>
> Brad
>
> -------------------------------------------------------------------------
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> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>
>   

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Re: [Bluez-devel] a2dp and multiple headsets

[JP Freeley (GMAIL-NYC)]

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brad --

last question....if I indeed wanted to install 35 transmitters and 35 
headsets, as crazy as that may sound, must I then worry about RF 
interference in the room?

you said "you'd never reach 35" and I'm not sure what my "limiting 
factor would be"... is it RF interference?

in general, how many BT radios (frequency-wise) can exist in a single room?

thanks,

jpf

Brad Midgley wrote:
> JP
>
>   
>> Am I correct that in some profiles (i.e. OPP, FTP, SPP) 1 BT device can 
>> make upto 7 simultaneous connections?
>>     
>
> OPP etc are all point-to-point profiles. You may have heard that one 
> master device can have 7 slaves in its piconet.
>
> Brad
>
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
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> _______________________________________________
> Bluez-devel mailing list
> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>
>   

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Re: [Bluez-devel] a2dp and multiple headsets

[Sergey Krivov]

Hi JP,

I was able to stream A2DP to two headsets
simultaneously. So, in principle, you dont need 35
transmitters :). At lower a2dp bit rates the ratio may
increase, i did not test it though. 

--- "JP Freeley (GMAIL-NYC)" <jpf321@gmail.com> wrote:

> brad --
> 
> last question....if I indeed wanted to install 35
> transmitters and 35 
> headsets, as crazy as that may sound, must I then
> worry about RF 
> interference in the room?



 
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Re: [Bluez-devel] a2dp and multiple headsets

[JP Freeley (GMAIL-NYC)]

[-- Attachment #1.1: Type: text/plain, Size: 1353 bytes --]

Thanks Sergey ---

What transmitter/headset brand/model did you use? Did you try streaming 
to 3?

jpf

Sergey Krivov wrote:
> Hi JP,
>
> I was able to stream A2DP to two headsets
> simultaneously. So, in principle, you dont need 35
> transmitters :). At lower a2dp bit rates the ratio may
> increase, i did not test it though. 
>
> --- "JP Freeley (GMAIL-NYC)" <jpf321@gmail.com> wrote:
>
>   
>> brad --
>>
>> last question....if I indeed wanted to install 35
>> transmitters and 35 
>> headsets, as crazy as that may sound, must I then
>> worry about RF 
>> interference in the room?
>>     
>
>
>
>  
> ____________________________________________________________________________________
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> Check out "Tonight's Picks" on Yahoo! TV.
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>
>   

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Re: [Bluez-devel] a2dp and multiple headsets

[Sergey Krivov]

JP,

IBM T40 internal bluetooth vs HP stereo bluetooth
headset and Motorola  HT820 headset. No, i did not try
with 3, i had just two headsets, but it should not be
difficult to try if you have them.


--- "JP Freeley (GMAIL-NYC)" <jpf321@gmail.com> wrote:

> Thanks Sergey ---
> 
> What transmitter/headset brand/model did you use?
> Did you try streaming 
> to 3?
> 
> jpf
> 
> Sergey Krivov wrote:
> > Hi JP,
> >
> > I was able to stream A2DP to two headsets
> > simultaneously. So, in principle, you dont need 35
> > transmitters :). At lower a2dp bit rates the ratio
> may
> > increase, i did not test it though. 
> >
> > --- "JP Freeley (GMAIL-NYC)" <jpf321@gmail.com>
> wrote:
> >
> >   
> >> brad --
> >>
> >> last question....if I indeed wanted to install 35
> >> transmitters and 35 
> >> headsets, as crazy as that may sound, must I then
> >> worry about RF 
> >> interference in the room?
> >>     
> >
> >
> >
> >  
> >
>
____________________________________________________________________________________
> > TV dinner still cooling? 
> > Check out "Tonight's Picks" on Yahoo! TV.
> > http://tv.yahoo.com/
> >
> >
>
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>
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
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> >
>
https://lists.sourceforge.net/lists/listinfo/bluez-devel
> >
> >   
> >
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