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Windows 7: Sigmatel "stereo mix" works, including Audacity record

29 Nov 2009   #1

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
Sigmatel "stereo mix" works, including Audacity record

Until today, I had failed at getting “stereo mix” aka “what you hear” recording going in Windows 7 32-bit, even when choosing “show disabled devices” or “show disconnected devices” with a right click in the control panel recording tab. I have an Intel DG965RY motherboard that has a Sigmatel sound chip. Intel is not supplying Win 7 drivers for this board, so my choices were whatever is on the Windows 7 disc or whatever I can locate on the net, which are Vista drivers of one type or another.

I was about to give up and buy a separate sound card, but gave it one more try. Here is what I did. It may or may not work for you:

Uninstall onboard sound drivers in Device Manager. Uninstall any remaining IDT or Sigmatel entries in add/remove programs.

Attempt to install this older Sigmatel driver from Intel: IDT Sigmatel Audio Driver

It may work as is for you, but it didn’t for me. It failed with this error: this system does not support the driver you are trying to install. I got the same result in compatibility mode for Vista sp2 and xp2

Rebooted and accepted installation of default Windows drivers. Control panel now showed a Sigmatel entry, which I am SURE I have never previously had with Win 7.

The playback tab shows 2 sets of speakers; only 1 works.

The recording tab in control panel now showed duplicate entries for microphone, line in, rear mic, and a single entry for stereo mix. I haven’t checked, but I would guess only 1 set of the duplicate pairs will work. The single stereo mix choice works as intended.

The details tab in device mgr shows this as hardware IDs:


I can record what I am listening to in Audacity with its Preferences defaults, which are: Interface host: MME; Playback: speakers; Recording device: stereo mix. Make sure the slider next to the master volume control dropdown is set near the midpoint.

I can only guess that the first failed attempt at installing the Vista driver installed the Sigmatel control panel, a set of entries in the sound control panel, and some aspect of “stereo mix” that was later preserved when updated by the default drivers. I do know that the default drivers alone never provided “stereo mix”.

The only apparent downside is the duplicate set of entries (except for stereo mix) in the sound control panel.

Here is a pic of the driver tab in Device Manager.

Attached Images
Sigmatel "stereo mix" works, including Audacity record-sigmatel-driver-ok-whatuhear-win-7.jpg 
My System SpecsSystem Spec
05 Dec 2009   #2

windows 7 professional & ultimate 64bit laptops

I tried go.

went back to what I had updated to
My System SpecsSystem Spec
05 Dec 2009   #3

Windows 10 64 bit

I have an Intel DP35DP motherboard. The latest Intel IDT HD Audio driver on the Intel downloads for my motherboard added the System Mixer. I had used that for a while, after my SoundBlaster sound card died, until I got a new sound card (Striker 7.1). I haven't tried any non-Intel IDT/SigmaTel drivers.
My System SpecsSystem Spec


 Sigmatel "stereo mix" works, including Audacity record

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