P1220/P1520/P1550 Drivers - Audio Files Instructions for installation of audio drivers on POS: 1) Copy files to a directory on the POS 2) Go to Control Panel / System / Hardware Tab and choose Device Manager 3) Find the Audio device, right-click it and select 'Update Driver' 4) On the dialog that comes up, choose to have Windows search for the hardware. 5) The next dialog box will allow you to specify a location for Windows to search for the driver. Have Windows search in the directory you placed the drivers in. If the detection doesn't happen, try removing the wdma_int.inf and renaming the wdma_RAD.inf to wdma_int.inf in the folder where you placed the files. Then repeat steps 1-5. Note: The .SYS and .DRV files should already be in the operating system. They are included them in the zip file just in case.Download Driver Pack
After your driver has been downloaded, follow these simple steps to install it.
Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.
Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.