Re: [Bluez-users] Audio & Bluetooth

Marcel Holtmann
2004-11-12T01:26:55Z

Hi Martin,

if you sign your emails, then make sure that your public key is
available for download somewhere or don't sign at all.

> > the SCO mapping HCI is the right one, because for the PCM you need
> > access to the PCM interface on your Bluetooth chip and normally you
> > can't access this on an USB dongle.
> >
> > > Is there anyway that can be done to this in regards to audio ?
> >
> > For a CSR chip the SCO mapping can be changed.
>
> How can the mapping be changed, if I may ask. I've been looking around
> and the only material that i found of it, is actually that you stated at
> some point, that they have to match, but not how it can be changed.

It must be set to SCO over HCI to get it working. Most dongles sold now
uses this setting by default. Some older don't. So this is a CSR chip
and all settings are in the persistant storage (PS). So you only have to
set the PS key for this one to HCI instead of PCM.

Said this there is a Windows program called pstool that can do this for
you, but it is not freely available. This is CSR specific and if you dig
deep enough into the source code of BlueZ and also the OpenBT project,
you can get the knowledge on how to change it. I don't provide a tool
for it and I also won't answer any further questions about this.

Regards

Marcel