Use and Care Manual

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If you want to use the keyboard to play the internal sound of the
instrument, you must send MIDI messages from the computer's DAW
software back to the instrument via USB. When you turn on the USB soft
thru, you no longer need to connect to the computer and the MIDI
messages you play will directly return to the internal sound module via
WIDI USB. The same messages are also sent to the external BLE MIDI
device via WIDI Bluetooth. Please use WIDI App to set the USB soft thru
switch.
⚫ Group connection with multiple WIDI devices via Bluetooth
WIDI Bud Pro supports group connection via Bluetooth from Bluetooth
firmware version v0137 and higher. Group connections will allow two-way data
transmission of 1-to-4 MIDI split and 4-to-1 MIDI merge. And it supports
simultaneous use of multiple groups.
Video instruction: https://youtu.be/ButmNRj8Xls
1. Open the WIDI App.
（Version 1.4.0 or higher）
2. Upgrade WIDI Bud Pro to the latest firmware (both USB and
Bluetooth). Then keep only one WIDI product powered on.
Note: Please remember to avoid having multiple WIDIs powered on at the
same time. Otherwise, they will be automatically paired one to one. This will
cause the WIDI App to fail in finding the WIDI you want to connect to as they
are already occupied.
3. Set your WIDI Bud Pro as “Force Peripheral” role and rename it.