Resolve px.dll Errors in Windows

Px.dll is a Sonic engine file that is used for playing audio CDs in DAE (Digital Audio Extraction) mode. DAE is also commonly referred as “ripping”. In this process, audio data extracted from CDs is stored in the WAV format. Most CDs store audio data in AIFF format, and px.dll, along with other processes, is used for reformatting AIFF to WAV. Applications such as Windows MPEG player and Winamp also use this file to play audio content in the WAV format.

Memory and CPU usage report

This program is a low memory usage program and does not normally use much of your CPU resources. In other words, px.dll is one of those programs that are light on your computer resources and do not cause system slowdowns.


This program does not fall in the category of ‘critical’ programs. In other words, removing the file does not have an adverse effect on your Windows computer. At the most, you will not be able to make the most of some of the capabilities of your audio player. So, with that clear, we recommend that you don’t remove the file unless you suspect it of causing trouble on your Windows PC.

Error 1

After you install Winamp 5.09 player, the following error message may appear:

“Winamp 5.09: winamp.exe – Ordinal Not Found
The ordinal 422 could not be located in the dynamic link library PX.dll.”


To repair the issue, you need to complete the following steps:

  1. Click Start.
  2. Click Control Panel.
  3. Locate and select Winamp 5.09 in the currently installed programs list.
  4. Click Remove/Uninstall.
  5. Restart Windows.
  6. Run the Winamp 5.09 setup to reinstall the program.
  7. Select Choose Components during the setup.
  8. Click Audio File Support, and uncheck Sonic Ripping/Burning.
  9. Restart Windows.

Error 2

You may receive the following error message when you start/shut down your computer or at other random times:

“DDE Server Window: winamp.exe – Ordinal Not Found
The ordinal 373 could not be located in the dynamic link library PX.dll.”

Typically, the above mentioned error occurs if the px.dll is missing from your computer. To fix the issue, download the DLL file from a reliable online source and save the file in C:\Windows\System32. Next, perform the following steps to register the DLL:

  • Click Start.
  • Click Run.
  • Type regsvr32 px.dll in the Open box, and then press Enter.