Sigmatel and stereo mix

We know of 2 ways, but neither works for all models. The easiest is to use an LG Sigmatel driver which has the functional stereo mix. But a poster once wrote that it didn't work for his M1210; however recently a poster did install it successfully on an M1710. If you want instructions for it I need to know your operating system.

The other way follows. Go down to the bottom and read 'other models'.

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There is a very long thread at notebookforums.com called "Hacking SigmaTel Drivers for E1705/9400, i need knowledgable helpers", started by Veazer. Another poster working with him, falerus, found that he could unlock a number of controls and features in the SigmaTel audio driver by modifying a certain inf file in the R122161 audio driver. Building on falerus's ideas, eddiep, cais, and EagleGT modified inf files for other Dell laptops that also use the SigmaTel 92xx audio chip and R122161 driver.

Following are the laptop models, links to the modified inf files, and instructions for completing the hack. (These are falerus's instructions that I have modified a bit.)

E1705/9400 and Precision M90:

1. Look at falerus's post (#62 on page 5 of the thread) for his link to a modified 92XXM2-3.ini file. The link is right under the words "Attached Files". You will need to register to get it, then download and unzip it.

falerus inf file for E1705

2. Uninstall your SigmaTel driver through Add/Remove programs and download the Dell R122161 SigmaTel driver for XP. (The R122161 is the particular driver that was hacked. Windows Vista users should also use it.)

R122161 driver

3. Run the file. It will unpack the files to the location you specify and then start to install the driver. Cancel the InstallShield installation.
4. Go to the folder where the files were unpacked and browse to the "WDM" folder (C:\Dell\drivers\R122161\WDM).
5. Copy the modified 92XXM2-3.ini into that WDM folder, overwriting the existing one.
6. Go back up one folder to "R122161" (C:\Dell\drivers\R122161).
7. Double click and run Setup.exe. (You might want to turn off your antivirus program first.) The new installation puts a full featured SigmaTel audio control panel in the Windows Control Panel.
8. Restart
9. To enable Stereo Mix, go to Control Panel/Sounds, open the record tab, right click to display disabled devices then right click the Stereo Mix entry and enable it.



E1505/6400:

1. Look at eddiep's post (#235 on page 16 of the thread) for his link to the modified 92XXM2-5.ini file. You will need to register to get it, then download and unzip it.

eddiep's inf file for E1505

2. Follow the instructions for the E1705 above starting with step 2. In step 5 copy the modified 92XXM2-5.ini into the WDM folder, overwriting the existing one.


E1405/640m:

1. Look at falerus's post (#290 on page 20 of the thread) for his link to the modified 92XXM2-1.ini file. You will need to register to get it, then download and unzip it.

cais inf file for E1405 as modified by falerus

2. Follow the instructions for the E1705 above starting with step 2. In step 5 copy the modified 92XXM2-1.ini into the WDM folder, overwriting the existing one.


Latitude D620 and D820:

1. Look at EagleGT's post (#306 on page 21 of the thread) for his link to the modified 92XXM2-2.ini file. You will need to register to get it, then download and unzip it.

EagleGT inf file for D620

2. Follow the instructions for the E1705 above starting with step 2. In step 5 copy the modified 92XXM2-2.ini into the WDM folder, overwriting the existing one.


Other Models:

The above inf files, 92XXM2-1 -2 -3 & -5, are the only ones that have been modified so far. One or more of these might apply to a model of computer other than the ones listed above. For example, someone reported that the hack worked on a M1710, but I wasn't sure which modified inf file he used; I think the -3 one for the 1705. Cais gives some instructions for figuring out which inf file is used in post #292 on page 20 of the "Hacking SigmaTel Drivers" thread.

The following models are the rest of the Dell's that are compatible with the R122161 driver. If you have one of these models it is worthwhile to try out the different modified inf files in step 5 of the above instructions and see if one of them works for you.

B120, 1300/B130, M140/630m, D420, D520, 120L, M65, XPS M1210 & M1710 & M2010

These have the SigmaTel 92xx HD audio chip. The hack will not work on any model with the SigmaTel STAC 97xx chip.

Post #404 on page 27 by hunnja gives some complicated instructions for the Inspiron 1501 model.
The 1501 instructions reportedly also work for the Inspiron E1405 model.

Jim