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From: MsdnSubscriber on 14 Apr 2010 23:22
Hi,
I'm working on a project and part of it is to apply sounds effects
(equalizer) to system audio - note, not the inidivudal streams coming to the
mixer but the final combined audio stream.

We experimented with DirectShow audio filters, but the filters are only
loaded for applications that use DirectX architecture and each application
loads its own filter. So we don't get system-wide filtration that we need.

Is it possible to even do that? how?
From: Maxim S. Shatskih on 15 Apr 2010 13:00
> Is it possible to even do that? how?

In pre-Vista you will need KS filter, in Vista+ the so called APO.

--
Maxim S. Shatskih
Windows DDK MVP
maxim(a)storagecraft.com
http://www.storagecraft.com

From: MsdnSubscriber on 16 Apr 2010 01:50
Where can I find detailed information about APOs? Are there any APO samples
out on the web?

"Maxim S. Shatskih" wrote:

> > Is it possible to even do that? how?
>
> In pre-Vista you will need KS filter, in Vista+ the so called APO.
>
> --
> Maxim S. Shatskih
> Windows DDK MVP
> maxim(a)storagecraft.com
> http://www.storagecraft.com
>
> .
>
From: Maxim S. Shatskih on 16 Apr 2010 05:12
Google for "XAPO"

--
Maxim S. Shatskih
Windows DDK MVP
maxim(a)storagecraft.com
http://www.storagecraft.com

"MsdnSubscriber" <MsdnSubscriber(a)discussions.microsoft.com> wrote in message news:746A7EE0-4B6A-4A41-A81D-19A610B8DB5C(a)microsoft.com...
> Where can I find detailed information about APOs? Are there any APO samples
> out on the web?
>
> "Maxim S. Shatskih" wrote:
>
>> > Is it possible to even do that? how?
>>
>> In pre-Vista you will need KS filter, in Vista+ the so called APO.
>>
>> --
>> Maxim S. Shatskih
>> Windows DDK MVP
>> maxim(a)storagecraft.com
>> http://www.storagecraft.com
>>
>> .
>>
From: MsdnSubscriber on 16 Apr 2010 22:36
Ok...now I'm a bit confused because sAPOs and xAPOs are two different
things..right? To me XAPOs are the same as DirectShow filters...which means
that if I write an XPO then the effect will apply only to the local stream or
XAudio based applications.

However, sAPOs apply to the entire system...which is one my requirements
i.e. to apply effect on the combined audio stream of the system that is ready
to be sent to an audio endpoint.

Can you confirm that I'm right/wrong about above presumptions?

Thanks!

"Maxim S. Shatskih" wrote:

> Google for "XAPO"
>
> --
> Maxim S. Shatskih
> Windows DDK MVP
> maxim(a)storagecraft.com
> http://www.storagecraft.com
>
> "MsdnSubscriber" <MsdnSubscriber(a)discussions.microsoft.com> wrote in message news:746A7EE0-4B6A-4A41-A81D-19A610B8DB5C(a)microsoft.com...
> > Where can I find detailed information about APOs? Are there any APO samples
> > out on the web?
> >
> > "Maxim S. Shatskih" wrote:
> >
> >> > Is it possible to even do that? how?
> >>
> >> In pre-Vista you will need KS filter, in Vista+ the so called APO.
> >>
> >> --
> >> Maxim S. Shatskih
> >> Windows DDK MVP
> >> maxim(a)storagecraft.com
> >> http://www.storagecraft.com
> >>
> >> .
> >>
> .
>
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