What is cmaudio?

The genuine cmaudio.sys file is a software component of C-Media PCI Audio Driver by C-Media.
An audio device driver for C-Media PCI cards, this process starts with Windows and runs in the background. It allows your operating system to communicate with your C-Media audio hardware. If this driver is uninstalled or corrupted, your audio will cease to function properly. Based in Taiwan, C-Media is a software and hardware company that focuses on processors for PC audio.

CMAudio stands for C-Media Audio Driver

Cmaudio.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if cmaudio.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for cmaudio drivers in need of updating

Cmaudio.sys file information

The process known as C-Media Audio WDM Driver belongs to software C-Media PCI Audio Driver by C-Media (

Description: Cmaudio.sys is not essential for the Windows OS and causes relatively few problems. Cmaudio.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 377,358 bytes (55% of all occurrences), 379,726 bytes, 280,782 bytes or 380,110 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. There is no detailed description of this service. It is not a Windows system file. It is a Microsoft signed file. cmaudio.sys appears to be a compressed file. Therefore the technical security rating is 14% dangerous, however you should also read the user reviews.

Recommended: Identify cmaudio.sys related errors

Important: Some malware disguises itself as cmaudio.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the cmaudio.sys 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

Muse Soundkarten Treiber! Nicht gefährlich!
ist teiber für soundkarten
C-Media WDM Audio Driver
It is marked as unstable by Toni's Easy Cleaner referring to RunD1132cmicnfg.cpl
Audio driver
Audio Driver software

Summary: Average user rating of cmaudio.sys: based on 4 votes with 6 user comments. 2 users think cmaudio.sys is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users don't grade cmaudio.sys ("not sure about it").

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Best practices for resolving cmaudio issues

A clean and tidy computer is the key requirement for avoiding problems with cmaudio. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the cmaudio.sys process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

cmaudio.sys [all]