Hi Uwe,
As per Mitch Rundle, IDirectSound::SetSpeakerConfig on Vista is a no-op:
-------------
IDirectSound::SetSpeakerConfig
is a no-op on Vista. There is no longer a public method for setting
the speaker config.
Regards,
Mitch Rundle
Microsoft
-------------
You can read the thread where this is discussed, and a number of
developers are upset about it breaking:
http://social.msdn.microsoft.com/Forums/en-US/windowspro-audiodevelopment/thread/187692f0-c71a-4317-98f9-77bcc6d67d08
The KS property that you talk about is still "alive", but it does not
map from SetSpeakerConfig any more!
Thanks.
Devendra.
uwekirst wrote:
Hi Devendra,
AI Developer schrieb:
but rendered useless "officially" - one such
example is the DirectSound's Set Speaker Config API.
I disagree with you in in this special case only. I think you are
talking here about the KSPROPERTY_AUDIO_CHANNEL_CONFIG request, the
speaker configurations maps to this request. It seems that the channel
configuration is the only way how a driver can determine the number of
channels used. This is because the microsoft mixer maps (copies) a 2
Channel playback stream to a 8 channel stream in any case, regardless
of this property.
So if the audio hardware wants for some reasons to know the "real"
number of channels (that means the number of channels used out of 8),
this is the only way.
In case only 2 channels are used the other 6 hardware channels could be
mapped to other audio devices.
For my driver this is was very helpfull. In older driver versions we
had a custom switch for this kind of setting, which could be replaced
with the channel configurations.
Thanks,
/Uwe
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