8. How to control K9 Pro on FiiO Music App or FiiO Contol?
1. Please update the FiiO Control App to the latest version (Click the link to get the latest Android version: https://forum.fiio.com/note/showNoteContent.do?id=202105071628040377809&tid=17
Ensure that the FiiO Control App is the latest version. Enter the the App->Tap the FiiO K9Pro to complete the connection. After a successful connection, it will enter the Bluetooth control menu.
EQ is only valid for Bluetooth
What should I do if other phones are connected?
It is not recommended to use FiiO Control and FiiO Music at the same time"