Conexant HD-Audio SmartAudio 221 Driver Download

Conexant Drivers

The HD-Audio SmartAudio 221 is an audio device manufactured by Conexant. This driver fixes problems with no sound or static or distorted sound, and can unlock advanced features of your audio device. This version of "" is rated (5 out of 5 stars) based on 50,800 downloads and 272 reviews. Our users report success installing this driver update on PCs running Windows 7, Windows Vista and Windows XP. The total disk space used for this update is 3.1 MB.

272 Ratings (see all reviews)

Supported Models

hd samrt audio 221 xp(hermosacx20561- 5051 device)

Conexant HD-Audio SmartAudio 221



Supported Operating Systems

Windows Vista (64 bit), Windows XP

File Name


3.45 (9-Mar-2008) (2008-01-21) via .inf

Additional Notes

conexant high definition smart audio 221 -- cx20561 hermosa device 5051 system operativo xp

Uploaded By

fernando (DG Member) on 19-Mar-2008

Most Helpful Reviews

10 of 11 people found the following review helpful:
Tested on Windows XP
7 Apr 2011
(15 hours after download)

Installation: 4 out of 5
Stability: 4 out of 5
Compatibility: 4 out of 5
"The driver it's ok (a laptop Lenovo N500), but WARNING:

yuo have to put first the UAA from microsoft if you have

winXP-SP1 or 2, and maybe works directly with SP3 (i didn't taste)


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6 of 7 people found the following review helpful:
Mick Gunn
Tested on Windows XP
14 Sep 2009
(11 minutes after download)

Installation: 5 out of 5
Stability: 5 out of 5
Compatibility: 5 out of 5
"Tried to get an XP audio driver for a Presario C700 laptop after downgrading from Vista, driver guide was the only driver that worked.

Thank you"

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4 of 5 people found the following review helpful:
Tested on Windows XP
14 Feb 2009
(5 months after download)

Installation: 3 out of 5
Stability: 4 out of 5
Compatibility: 4 out of 5
"Mic doesn`t work"
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4 of 5 people found the following review helpful:
Tested on Windows XP
16 Jan 2009
(1 month after download)

Installation:  out of 5
Stability:  out of 5
Compatibility:  out of 5
"Funciono bien con la Compaq HP c700"
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Tested on Windows XP
6 Jul 2015
(10 minutes after download)

Installation: 5 out of 5
Stability: 4 out of 5
Compatibility: 5 out of 5
"Simple, fast and reliable is all I can say. Kudos!"
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See all Conexant HD-Audio SmartAudio 221 ratings and reviews

Driver Contents File List

The following files are found inside the driver download file.

Name Size Date
XP32/CHDAud.sys 732.2 KB 18 Dec 2007
XP32/ISACS.ini 173 bytes 26 Jun 2007
XP32/Setup.exe 800.1 KB 26 Jul 2007
XP32/SmAudio/Setup.exe 796.0 KB 26 Jun 2007
XP32/SmAudio/SmAudio.ini 7.7 KB 24 Jul 2007
XP32/SmAudio/SmAudio/SmAudio.exe 3.5 MB 24 Jul 2007
XP32/SmAudio/SmAudio/dll/res0401.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0404.dll 24.6 KB 20 Apr 2005
XP32/SmAudio/SmAudio/dll/res0405.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0406.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0407.dll 28.7 KB 20 Apr 2005
XP32/SmAudio/SmAudio/dll/res0408.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0409.dll 28.7 KB 12 Dec 2006
XP32/SmAudio/SmAudio/dll/res040a.dll 28.7 KB 20 Apr 2005
XP32/SmAudio/SmAudio/dll/res040b.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res040c.dll 28.7 KB 20 Apr 2005
XP32/SmAudio/SmAudio/dll/res040d.dll 28.7 KB 20 Apr 2005
XP32/SmAudio/SmAudio/dll/res040e.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0410.dll 28.7 KB 20 Apr 2005
XP32/SmAudio/SmAudio/dll/res0411.dll 24.6 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0412.dll 24.6 KB 20 Apr 2005
XP32/SmAudio/SmAudio/dll/res0413.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0414.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0415.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0416.dll 28.7 KB 3 Oct 2005
XP32/SmAudio/SmAudio/dll/res0419.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res041d.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res041e.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res041f.dll 28.7 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0804.dll 24.6 KB 12 Apr 2005
XP32/SmAudio/SmAudio/dll/res0816.dll 28.7 KB 3 Oct 2005
XP32/SmAudio/x64/setup64.exe 1.1 MB 26 Jun 2007
XP32/UCI32A21.dll 217.1 KB 24 Jul 2007
XP32/UIU32a.exe 794.6 KB 26 Jul 2007
XP32/WiSVHe5.inf 29.2 KB 23 Feb 2008

How to Update Conexant HD-Audio SmartAudio 221 Device Drivers Quickly & Easily

Step 1 - Download Your Driver

To get the Conexant HD-Audio SmartAudio 221 driver, click the green download button above. After you complete your download, move on to Step 2.

If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Conexant HD-Audio SmartAudio 221 into the search box above and then submit. In the results, choose the best match for your PC and operating system.

Tech Tip: If you are having trouble deciding which is the right driver, try the Conexant Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.

To find the newest driver, you may need to visit the Conexant website. Most major device manufacturers update their drivers regularly.

Step 2 - Install Your Driver

Once you have downloaded your new driver, you'll need to install it. In Windows, use a built-in utility called Device Manager, which allows you to see all of the devices recognized by your system, and the drivers associated with them.

How to Open Device Manager

  • In Windows 11, Windows 10 & Windows 8.1, right-click the Start menu and select Device Manager

  • In Windows 8, swipe up from the bottom, or right-click anywhere on the desktop and choose "All Apps" -> swipe or scroll right and choose "Control Panel" (under Windows System section) -> Hardware and Sound -> Device Manager

  • In Windows 7, click Start -> Control Panel -> Hardware and Sound -> Device Manager

  • In Windows Vista, click Start -> Control Panel -> System and Maintenance -> Device Manager

  • In Windows XP, click Start -> Control Panel -> Performance and Maintenance -> System -> Hardware tab -> Device Manager button

How to Install a driver from Device Manager

  1. Locate the device and model that is having the issue and double-click on it to open the Properties dialog box.

  2. Select the Driver tab.

  3. Click the Update Driver button and follow the instructions.

In most cases, you will need to reboot your computer in order for the driver update to take effect.

Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.

For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.

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