Windows · Windows 7

Windows 7 64bit and Sigma Tel High Definition Audio CODEC Problems

I recently upgraded my work laptop to the latest and greatest edition of Microsoft’s primary operating system Windows 7, 64bit. Seeing this is the first time I am migrating fulltime to a 64bit Windows system I have decided to keep my old 32bit Windows Vista partition on the same laptop using dual partitions. Everything with the installation of Windows 7 has worked flawlessly accept for one major problem has an easy fix.

My Dell XPS M1330 laptop uses an audio device referred to as the Sigma Tel High Definition Audio CODEC. Unfortunately after installing a fresh copy of Windows 7 64 bit no audio could be heard, even though the volume was up at full and all the device drivers reported did not any problems.

If you search the internet for Sigma Te High Definition Audio there is not much in the way of helpful results. Thankfully I found a simple solution; you simply have to manually install the Windows Vista, Sigma Tel HD Audio drivers onto your 64bit Windows 7. It seems the default drivers included in Windows 7 are maybe only 32 bit compatible? Dell thankfully offers set of Windows Vista drivers from their websiteDell thankfully offers a set of Windows Vista drivers from their FTP site that supports both 32bit and 64bit. And while they are dated 13th August 2007 they work fine in Windows 7.

As mentioned in this article’s comments some people have been expiriencing problems with the combination of Skype, Windows 7 and the Sigma Drivers. Skype seem to be aware of the problem but currently do not offer a solution other than to suggest that you make sure Skype and your drivers are up to date.

Why am I experiencing sound/video problems when using Skype with Windows 7? We are aware that not all sound and/or video drivers are compatible with Windows 7 when using Skype.

Device Driver

34 thoughts on “Windows 7 64bit and Sigma Tel High Definition Audio CODEC Problems

  1. Hello all.

    I found solution and fixed all of my problems!

    As per this post:
    * Go to the bottom of page 4!

    Use this driver:

    IDT took over SigmaTel – R226903 driver works GREAT!
    I cannot be more happier that now everything works like it should!
    Good luck to all!

  2. i’m having the same prob. in my case i had no prob for 3 monthes (since i upgraded to 7). the prob occured few days ago, when the laptop(inspiron 1525) was connected to the TV via a hdmi cable and using Skype at the same time. from that moment everything went wrong. I uninstalled the drivers ver A03 and tried to install the A02 ver; and nothing. I installed the last Skype 4.2; and nothing. but i’ll keep on trying.

  3. Unfortunately, drivers that Reborn posted link for – did not work on my Dell Inspiron 1525.
    After running the setup file I get the message: “This is not the correct audio driver for this system. The installer will now exit.”
    Driver is a motherboard specific and it will work with those MoBos posted in “read me” file that comes with installation.
    As of today I have not found a single SigmaTel driver for Windows 7; only for Vista.
    My quest continues. Good luck to all.

    1. Yes The drivers are specific for the certain motherboards but. So far we have discovered that certain software is written and in .inf file there is no statement about your MOBO or computer by it self so when you will unpack to install it is unpacked ether in temp folder or in Cab folder or Drivers folder as we know ( i think :)) So you can go and with in Manual install option “Have Disk” you ca resolve that sometimes stupid software glitch ! BTW I have to announce that this posted drivers are for the motherboards with 945,965,975 graphic built in/or not chip-sets for Intel D or Very First Intel Dual Core Procs. For the Newer motherboards you have the other one that worked for me and I have download from Realtek website directly ! AND ONE MORE COMMENT : Yes there is no still a Real Good Driver Written For Win 7 Because The drivers are in 98% fully compatible with STUPID Vista’s OP SYS. In one hand It is good.
      I will post the other Newer Driver set so good luck to everybody in DRIVER JOURNEY! Learn On Fly And Never Get Dry! POST Pls!
      Have Fun Guys

  4. Big thanks to Reborn for the link, had recently upgraded Inspiron 1720 from vista 32bit to win 7 ultimate and was having same issues with skype but downloaded and installed his suggested driver and…. yipee it worked!! cheers

  5. R147073 driver did not work for me. Same Skype error message that no audio device can be find just like with any other SigmaTel driver I have tried.
    In my previous post; I stated that SigmaTel drivers have been replaced by “Intel® High Definition Audio HDMI” driver once uninstalled. That is not the case as I have made a mistake, sorry about it.
    After uninstallation of SigmaTel driver; Windows 7 installs “High Definition Audio Device” driver by Microsoft – just like Andy stated in his post. I can use Skype but with microphone connected through the jack; as build in microphone array (next to the camera) cannot be found without SigmaTel driver.
    We have lost a battle; but certainly not the war.

    1. Hello guys,

      I am in the same problem but with 64 bit windows 7, what i have discovered is that driver is only working for S/PDIF and some how you can only use the front output for headphones like speakers and depends of the motherboard on most of them you can use mic as well but on windows 7 32bit i dont have this problems at all everything works fine as I went to realtech site and downloaded the latest HD Sound drivers!
      Will keep you posted, there is an solution.

  6. I have found that Dell sound drivers version R147073 work with Windows 7 and do NOT cause Skype audio to break up. I would recommend also disabling Audio Enhancements (open Sound panel, double click on speakers, advanced).

    Tested on Inspiron 1420 Windows 7 64 bit.

    Hope this helps.

  7. Thanks for post Andy. I uninstalled SigmaTel driver and it was replaced by “Intel® High Definition Audio HDMI” driver automatically. Audio works fine with Skype now; even trough laptops build in speakers and trough headphone jacks.
    However; build in microphone array does not work at all. It is not found by device manager anymore and is not available in Sound properties. I still have an option for a Microphone “High definition Audio Device” trough jack and that one works fine.
    My opinion is that this problem with SigmaTel drivers on Windows 7 will not be resolved at all.
    As in my previous post; there is no solution available for very long time now by none of the parties that could work of fixing this. SigmaTel is out of the business in PC audio since 2006 and no new laptops that are running Windows 7 have their drivers or devices build in. Since February 2009 they are officially dead and exist no more.
    Good luck to all.

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