[wdmaudiodev] AW: Re: SFX APO not opened for each playing app
- From: "Johannes Freyberger" <jfreyberger@xxxxxxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 13 Apr 2018 22:04:46 +0200
* Like what kind of parameters?
I.e. different EQ-Settings if my SFX is an EQ, or different gain adjustments
for an AGC - I think there's a lot of use cases. I really would like to
process the audio streams from different applications in a separate way,
before they are mixed down by audiodg and finally arrive in my driver as an
already mixed bunch of samples. For this I had the idea of an SFX APO, which
I think could help me to access the different streams. But I've also not yet
solved, how to find out which stream belongs to which application. Do you
think this is possible?
Von: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> Im
Auftrag von Matthew van Eerde (Redacted sender "Matthew.van.Eerde" for
Gesendet: Freitag, 13. April 2018 21:19
Betreff: [wdmaudiodev] Re: SFX APO not opened for each playing app
* different parameters inside my SFX depending on the application
Like what kind of parameters?
<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx> > on behalf of Johannes Freyberger
Sent: Friday, April 13, 2018 11:39:03 AM
To: wdmaudiodev@xxxxxxxxxxxxx <mailto:wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] SFX APO not opened for each playing app
I've written a little test SFX APO and it seems to be loaded correct inside
audiodg.exe as I'm writing a logfile, where I can see the audiodg process id
and the corresponding calls (APOProcess(), GetLatency() etc.) when I
playback some test sounds in the audiodevice tab or in foobar2000. My idea
was to have an SFX because it's placed before the windows mixer, so I should
see different instances of my SFX for each application playing back on the
audio device. But I always only see one instance of my SFX running, also
when I have several apps playing back simultaneously.
Is there a mistake in my idea or should this work? If yes, what could I
In the end I'd be interested in also figuring out which application is
actually using my SFX in order to use different parameters inside my SFX
depending on the application and I thought about something like traversing
the filter graph back to the application and thus getting its process id.
Could this be possible or is there any other chance to find out the playing
Thanks a lot and best regards,
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