Latitude D531 Input Monitor Audio Problem

Question

Just need some help on audio problems...

I have a Dell Latitude D531 and as my work requires me to hear audio from the microphone hence I followed the instructions that was referred on the FAQ. I'm currently using Windows XP and using a Sigmatel STAC 92xxHD Audio Chip. I tried to modify the settings in the registry as stated by changing the binary codes of the registry "EnableInputMonitor" and "EnableIntSpkMute" to "01" and "00" respectively.

I restarted my computer and when I went into properties, it does not show the option of "Input Monitor" under "show the following volume controls". Can someone tell me if this is due to the fact that the laptop is using an AMD prcoessor or what have I done wrong ? It would be great if I can get inputs from people who suffers from this as well as any experts who have been able to play around with it. Appreciate the help.

Jim Coates · Answer

After I posted those instructions a new Sigmatel audio driver R171789 was released in December. The instructions will not work with that driver on any model. That might be the situation with your computer.

Your previous driver version was R153908 so you might try to either use 'rollback driver' in the driver's properties dialog, or

download the R153908

delete R171789

install R153908

I don't know whether or not monitoring can be enabled on the D531 so give it a try with the R153908 driver let us know if it works.

If it doesn't work and your job requires monitoring, route your mic into the mic preamp of a little mixer and monitor by using its headphone jack.

Jim

henzo82 · Answer

Hi Jimco,

Appreciate the reply, I manage to come across a solution that was found on another website but its rather tedious since it requires the modifications of the INI file. The website is is given as below and much credit goes to "muchtall" for his/her (Sorry dunno if its a he or she) knowledge.

Website: http://linuxwhore.com/modules.php?name=News&new_topic=4

I will also summarise it as how I got it working:

1. Firstly I had to check in the registry editor to see which ".ini" file was being used by Windows XP, to do this you have search for "SigmaTel High Definition Audio CODEC" and then search again for "IniPath". To know if your in the right direction, above the "IniPath" key, there is a key called "DeviceDesc" where the "Data" column should show "SigmaTel High Definition Audio CODEC".

When you click on this key it will show you the path of the INI file that is being utilized by windows XP, usually this file would end of as "...\92XXMX.X.ini", this is the file that you should take note of.

2. Now you would go on to make duplicates of the followings:

"C:\DELL\drivers\R171789\WDM\92XXMX-X.INI" (This is usually available when you try to extract the installation file downloaded from the Dell Support Website.

"C:\Program Files\SigmaTel\C-Major Audio\WDM\92XXMX-X.INI"
"C:\Program Files\SigmaTel\C-Major Audio\DellXPM_5515v131\WDM\92XXMX-X.INI"

(The original files should be renamed as 92XXMX-X.INI.orig as the author stated)

3. Next you would modify the contents of the 92XXMX-X.INI files (or in my case for my D531 the files used is 92XXM4-3.INI. You would change the following parameters as follows:

EnableInputMonitor = hex: 1
DigitalInputMonitor = hex: 1

You can also modify the other parameters as follows to gain more control of the soundcard (This is basically just showing the other features on the SigmaTel Program which can be acccessed oin Control Panel):

To see all of the config tabs:
Config_Tab = dword: 0x000000ff
To see all of the Advanced config options:
Config_Adv = dword: 0x000fffff
To allow sample rate adjustment:
Config_Rates = dword: 0x000000ff
To disable automatic input switching

RecordPriority = dword: 0xffffffff

4. You would then save the modified 92XXMX-X.INI file, next you would copy and paste this file to override the files in the folders mentioned earlier in point (2).

5. You would now go to Device Manager and uninstall the SigmaTel High Definition Audio CODEC driver and re-install it using the the setup file that can be found in the C:\DELL\drivers\R171789 directory.

6. Re-boot your computer to finish off the modification process and the "Input Monitor" should be visible for you to select in the playback option of the Volume Control properties.

I hope this helps and appreciate "muchtall" for providing an informative read on this fix for the new version of the driver as well you can also read up more information at the link stated above. Thanks to Jimco for your advice as well.

:smileyhappy:

levi2 · Answer

Hey Henzo82 thnx very much excellent advice

I have just go a vostro 1500 updated new sigmatel driver got the stereo mix but no input monitor tried a few things but didnt work then tried jimcos idea a reinstalled audio driver then done the registry edit i got audio input but slider was greyed out also lost stereo mix . so i tried yours by modifying the ini file first before reinstalling drivers works great got audio monitor input and the volume slider works on it also have me stereo mix .May i just add if anyone tries this and they dont know which inifile to use heres what to do

load up the dell support centre

select system info

click hardware tab

have a look in sound device

then PNP device

you will see something like this

7.1.1.3 PNP Device ID

HDAUDIO\FUNC_01&VEN_8384&DEV_76A0&SUBSYS_10280228&REV_1002\4&CE4CBCD&0

then look in your ini files till the numbers match

mine is 92XXM4-8.ini

Levi2

henzo82 · Answer

Hi Levi2, Glad to be of help, thanks for the additional info as well.

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Latitude D531 Input Monitor Audio Problem

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