Asio Error Code 0x54f - Cannot Open Focusrite Usb

Try these quick fixes first (they solve the issue for many users):

If none of the above work, proceed with the detailed solutions below.

Before uninstalling anything, check if Windows is holding onto the interface too tightly.

If the software fixes do not resolve error 0x54f, the issue is likely a physical connection failure masked as a software error. cannot open focusrite usb asio error code 0x54f

If you're implementing ASIO in your app and hit 0x54f:

// After ASIOStart() fails with 0x54f, force full reinitialization
ASIOStop();
ASIODisposeBuffers();
// Wait for USB reset (500ms min)
Sleep(500);
// Re-initialize
if (ASIOInit(&driverInfo) == ASE_OK) 
    ASIOCreateBuffers(&bufferInfo, numInputs, numOutputs, preferredSize, &asioCallbacks);
    ASIOStart();

Also call ASIOControlPanel() before ASIOStart() – many Focusrite units need user-space settings (sample rate, sync source) explicitly reconfigured after a USB error.

The "Cannot open Focusrite USB ASIO error code 0x54f" is almost never a hardware failure—it’s a Windows power management or driver access conflict. In 90% of cases, disabling USB selective suspend and releasing the device from system sounds will solve the problem immediately. Try these quick fixes first (they solve the

If you’ve worked through all 10 steps and the error persists, your Focusrite’s USB controller chip may be failing. Contact Focusrite Support (they are responsive) or test the interface on another computer to isolate the issue.

Now restart your computer, disable those power-saving settings, and get back to recording.

Have a different error code? Check our other guides for "Error 0x54e", "Error 0x00000001", or "ASIO device not present". If none of the above work, proceed with

This seems counterintuitive for ASIO (which needs exclusive control), but some Windows builds cause a deadlock when this option is also checked at the system level.

Steps:

Now restart your DAW. The ASIO driver will ignore this setting, but Windows will stop trying to share the device mid-session.

pnputil /enum-devices /class Audio

Look for your Focusrite. Also check Focusrite Control → Device Info tab → "Device Connected: Yes".

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\usbflags\VVVVPPPPRRRR]
"SkipBOSDescriptorQuery"=dword:00000001
"DeviceTimeout"=dword:000005dc   ; 1500ms default -> 5000ms

Where VVVVPPPPRRRR = VID_PID_REV (Focusrite common: 1235 8008 0000 for Scarlett 2i2 3rd gen). Find yours via Device Manager → Details → Hardware Ids.