Dual Mode Explained for the Roland FR-1x

In this video I will attempt to explain Dual Mode on the Roland FR-1x and how it can be used. You are able to switch between different accordions and orchestral/organ sounds, depending on what is active (orchestral/organ/accordion).
00:00 – Intro
01:00 – Dual Explained
07:09 – Happy Days are Here Again
Below are the only instructions I found in the manual, the rest is from “trial and error”. I hope you have found this to be useful.
Instructions from the FR-1x Manual – pages 27 and 28
SOLO and DUAL
The orchestral or organ sound assigned to the treble section can be played in isolation or together with the treble accordion sound.
1. Select an orchestral or organ sound.
See “Selecting sounds for the right hand” on p. 26.
2. Hold down the [SET] register and press treble register [4] (DUAL/SOLO) to alternate
between DUAL and SOLO modes.
NOTE
If you hold down [SET] for more than 2 seconds without pressing another register, the FR-1x switches to PARAMETER mode. In that case, press [SET] again to leave that mode, then repeat step (1) above
In SOLO mode, the treble keyboard only plays the selected accordion, orchestral or organ sound. DUAL mode means that the orchestral or organ sound is added to the treble accordion sound.