Double press Source button first and then double press the Filter button.
For example, if the MCU version is V2.1, then the front panel LED should be showing:
- MQA LED – Blink 2 times
- 44.1k LED – Blink 1 time
Double press Source button first and then double press the Filter button.
For example, if the MCU version is V2.1, then the front panel LED should be showing: