Audio EQ Control in XP Embedded

[Guest]

Hi:

We would like to be able to replicate a standard audio EQ settings on all of
our devices (running XP Embedded) without having to include the EQ control
component in the production image. I'm hoping the EQ values are stored in the
registry somewhere, but haven't been able to figure out where (I even did a
file comparison of a before/after text dump of the registry to see if I could
find it that way).

Our software uses DirectX (DirectShow) methods to play wmv files under
program control. On a normal Windows computer, the EQ controls are part of
Windows Media Player. Does anyone know where Media Players stores those EQ
settings?

Thanks

 

[Guest]

pablo,

I had mix results with this... seems that the audio settings can be reset at
the hardware level even when re-installing a ghost image. I've had moderate
success with this procedure. Download a free tool called "regmon" (search
google), configure it to monitor write-only requests.

open the audio control in windows and change the settings with the tool
running... i was able to grab the settings for the onboard AC97 device by
exporting (using regedit.exe) the groups of registry keys logged during the
changes... example:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\DeviceClasses\{6994AD04-93EF-11D0-A3CC-00A0C9223196}\##?#PCI#VEN_1039&DEV_7012&SUBSYS_01D0A0A0&REV_A0#3&61AAA01&0&17#{6994ad04-93ef-11d0-a3cc-00a0c9223196}]
"DeviceInstance"="PCI\\VEN_1039&DEV_7012&SUBSYS_01D0A0A0&REV_A0\\3&61aaa01&0&17"

Hopefully this is helpful to you,
Paul

 

[Guest]

Thanks!

pablo,

I had mix results with this... seems that the audio settings can be reset at
the hardware level even when re-installing a ghost image. I've had moderate
success with this procedure. Download a free tool called "regmon" (search
google), configure it to monitor write-only requests.

open the audio control in windows and change the settings with the tool
running... i was able to grab the settings for the onboard AC97 device by
exporting (using regedit.exe) the groups of registry keys logged during the
changes... example:

[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\DeviceClasses\{6994AD04-93EF-11D0-A3CC-00A0C9223196}\##?#PCI#VEN_1039&DEV_7012&SUBSYS_01D0A0A0&REV_A0#3&61AAA01&0&17#{6994ad04-93ef-11d0-a3cc-00a0c9223196}]
"DeviceInstance"="PCI\\VEN_1039&DEV_7012&SUBSYS_01D0A0A0&REV_A0\\3&61aaa01&0&17"

Hopefully this is helpful to you,
Paul

Hi:

We would like to be able to replicate a standard audio EQ settings on all of
our devices (running XP Embedded) without having to include the EQ control
component in the production image. I'm hoping the EQ values are stored in the
registry somewhere, but haven't been able to figure out where (I even did a
file comparison of a before/after text dump of the registry to see if I could
find it that way).

Our software uses DirectX (DirectShow) methods to play wmv files under
program control. On a normal Windows computer, the EQ controls are part of
Windows Media Player. Does anyone know where Media Players stores those EQ
settings?

Thanks

 

[KM]

Pablo,

You can find the reg.settings (would depend on media and hardware components
included in your image) with Regmon.

Or you can make a simple app to call API to set the right settings.

Read though this thread:
http://groups-beta.google.com/group/microsoft.public.windowsxp.embedded/msg/12b9abffac548aa8?hl=en

KM