What is stacsv64.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the stacsv64.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Stacsv64.exe file information

Windows Task Manager with stacsv64
Stacsv64.exe process in Windows Task Manager

The process known as IDT PC Audio or STacSV Module or IDT PC Audio TPE or IDT PC Audio - SHANGHAI DEVELOPMENT CENTER belongs to software IDT Audio or IDT PC Audio or Audio Service or SigmaTel Audio Service or C-Major Audio by IDT ( or SigmaTel (

Description: Stacsv64.exe is not essential for Windows and will often cause problems. The stacsv64.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 8/7/XP are 321,536 bytes (22% of all occurrences), 119,296 bytes and 16 more variants. 
The program has no visible window. Stacsv64.exe is not a Windows system file. Stacsv64.exe is able to hide itself. Therefore the technical security rating is 29% dangerous, however you should also read the user reviews.
In case you experience problems using stacsv64.exe, you can also do the following:
  1) uninstall the associated program (Start > Control Panel > Add/Remove programs > IDT Audio)
  2) visit the website.

Recommended: Identify stacsv64.exe related errors

If stacsv64.exe is located in a subfolder of C:\Windows\System32, the security rating is 17% dangerous. The file size is 244,736 bytes (29% of all occurrences), 240,128 bytes and 8 more variants. The program has no visible window. It is a Microsoft signed file. Stacsv64.exe is not a Windows system file. Stacsv64.exe is able to hide itself.

Important: Some malware camouflages itself as stacsv64.exe. Therefore, you should check the stacsv64.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

stacsv64.exe is part of C-Major Audio 1.X developed by SigmaTel
Reports to windows task manager as 'IDT PC Audio' on Windows 7 64 bit.
Well, I installed it, and now my sound only worked throught the headphone jack. Tried to revert to a previous driver. Now that doesn't even work.

Rating chart

Summary: Average user rating of stacsv64.exe: based on 6 votes with 3 user comments. One user thinks stacsv64.exe is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users suspect danger. One user thinks stacsv64.exe is dangerous and recommends removing it.

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Best practices for resolving stacsv64 issues

A clean and tidy computer is the key requirement for avoiding problems with stacsv64. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off doing a repair of your installation, or in the case of Windows 8, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the stacsv64.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

stacsv64.exe [all]