We'll send our observations to Futaba to see what they say, and how they respond.
We're glad to hear that you found a very likely reason for why you could not get it to sound.
Has this been fixed yet? I specifically bought this radio to use the vario tone with electric gliders.
I have updated the firmware to 2.0 and installed the speech software.
The fact that this discussion took place in May and it is now October worries me.
Futaba tech phone was no help at all.