Stereoping Synth Controller Owner's Handbook Manual page 14

To enter bootloader mode, hold the topmost button while powering the Synth Controller on. The middle
button will light up. You can release the button then of course. Configure the SysEx-dump-software to use the
correct Midi Output, open the firmware file and send it into the Synth Controller.
While the incoming stream is valid and saved into the program memory, the lights are flashing slowly one after
the other. The dump process should take less than a minute. If the button's lightshow ends and the lowest
button keeps flashing, an error occured. Either the firmware file was corrupt (unlikely) or the incoming data was
sent faster than the controller could write the data before. The software you dump the Firmware-File into the
controller should have a parameter somewhere like "Delay between Buffers". Set this parameter to at least
100 mS.
After the successful dump, the Synth Controller restarts again, welcoming you with some nicely flashing buttons
going into normal operation.