In the tab, uncheck "Allow applications to take exclusive control of this device". Repeat this for the Recording tab. 3. Match Sample Rates
Open the Focusrite Control software and check your sample rate. cannot open focusrite usb asio error code 0x54f
If your DAW is set to 48kHz but your Windows system sounds are set to 44.1kHz, the driver may fail to switch, triggering the 0x54f error. In the tab, uncheck "Allow applications to take