84,488,480 programs installed

Should I remove C-Major Audio?

What percent of users and experts removed it?
8% remove it92% keep it
Overall Sentiment
Very good
What do people think about it?
(click star to rate)
How common is it?
Global Rank #9,115
United States Rank #6,097
Reach 0.0416%
Lifespan of installation (until removal)
< 20.35 days
600.46 days >
Average installed length: 315.50 days


42xx 100.00%

C-Major Audio


C-Major Audio is a software program developed by SigmaTel. During setup, the program creates a startup registration point in Windows in order to automatically start when any user boots the PC. Upon being installed, the software adds a Windows Service which is designed to run continuously in the background. Manually stopping the service has been seen to cause the program to stop functing properly. It adds a background controller service that is set to automatically run. Delaying the start of this service is possible through the service manager. The setup package generally installs about 17 files and is usually about 712.93 KB (730,037 bytes). Relative to the overall usage of users who have this installed on their PCs, most are running Windows XP and Windows 7 (SP1). While about 70% of users of C-Major Audio come from the United States, it is also popular in United Kingdom and Germany.

Program detailsProgram details

URL: www.SigmaTel.com
Installation folder: C:\Program Files\SigmaTel\C-Major Audio
Uninstaller: RunDll32 C:\Program Files1\COMMON~1\INSTAL~1\PROFES~1\RunTime\10\00\Intel32\Ctor.dll,LaunchSetup "C:\Program Files\InstallShield Installation Information\{A
Estimated size: 712.93 KB
Language: English

Program filesFiles installed by C-Major Audio

  • stacapi.dll - C-Major Audio
  • stacsv.exe - STacSV Module
  • stlang.dll - Localize Module
  • stsystra.exe - Sigmatel Audio system tray application
  • suhlp.exe - NDRC
  • suhlp64.exe
  • stac97co.dll - stac97co_mfc Dynamic Link Library (stac97co_mfc DLL)
  • setuphlp.dll
  • fastinstall.exe - fastinstall Application (fastinstall MFC Application)
  • fi.exe
  • kb835221.exe
  • kb901105.exe
  • qfe.exe
  • R167846.EXE
  • setup.exe (by InstallShield Software) - InstallShield (R)
  • st325602.dll (by IDT) - IDT Audio (NDHF)
  • st645602.dll (by IDT)

Program behaviorsBehaviors exhibited

  • stacsv.exe runs as a service named 'SigmaTel Audio Service' (STacSV) "Manages SigmaTel Audio Universal Jack configurations.".
2 Startup Files (All Users Run)
  • setup.exe is loaded in the all users (HKLM) registry as a startup file name 'AudioSetup' which loads as C:\Program Files\IDT\IntelXPV_v103\setup.exe -postqfe.
  • stsystra.exe is loaded in the all users (HKLM) registry as a startup file name 'SigmatelSysTrayApp' which loads as C:\Program Files\SigmaTel\C-Major Audio\WDM\stsystra.exe.

Program resource utilizationResource utilization averages

Memory:2.71 MB
21.09 MB average
Total CPU:0.0005623792%
0.031193% average
Kernel CPU:0.00037387%
0.016088% average
User CPU:0.00018851%
0.015104% average
70 average
I/O reads/min:21 Bytes
435.61 KB average
Memory:5.63 MB
Total CPU:0.0026534101%
Kernel CPU:0.00186558%
User CPU:0.00078783%

How do I remove C-Major Audio?

You can uninstall C-Major Audio from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program C-Major Audio, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove C-Major Audio.

Win XP 73%
Win 7 0%
Automatically starts? Yes
(Found in the run registry)
Uninstall it 8%
Keep it 92%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows XP 75.49%
Windows 7 21.10%
Windows 10 2.56%
Windows Vista 0.85%
Which OS releases does it run on?
Microsoft Windows XP 76.24%
Windows 7 Ultimate 9.78%
Windows 7 Professional 4.83%
Windows 7 Home Premium 4.46%
Windows 7 Enterprise 0.74%
Windows 10 Pro 0.50%

Distribution by countryGeography

69.60% of installs come from the United States
Which countries install it?
  United States 69.60%
  United Kingdom 4.36%
  Germany 3.75%
  Canada 2.96%
  France 1.66%
  Italy 1.22%
  Mexico 1.05%
  Australia 0.96%
  Netherlands 0.96%
  Poland 0.96%
  Sweden 0.87%
  Spain 0.87%
  Belgium 0.52%
  India 0.52%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Dell 93.77%
Sahara 2.20%
Acer 1.71%
Hewlett-Packard 1.22%
ASUS 0.49%
Toshiba 0.37%
Lenovo 0.12%
Alienware 0.12%
Common models
Dell Latitude D610 27.30%
Dell Inspiron 6000 14.91%
Dell Computer Latitude D6... 11.72%
Dell Latitude D510 5.19%
Dell Inspiron 9300 4.79%
Dell Latitude D810 4.66%

About SigmaTel

SigmaTel is a System On a Chip SOC electronics and software provider that designs turnkey portable compressed AV media player/recorder SOCs, reference circuit boards, SOC Software Development Kits, media player software apps, and controller chips for multifunction peripherals.


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