Yamaha MU128 Owner's Manual page 163

2 Press the UTIL button and select "DUMPOUT," then press the
ENTER button.
3 From the Dump Out menu, select the type of data to be sent: All,
Multi or Performance. Then, press the ENTER button to call up the
selected data dump.
All
This transmits all MU128 data (including Part, Performance, system,
and all parameter values) to the connected device.
MU128 Utility Mode
Dump Out Functions (DUMPOOUT)
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