On Tyros and Genos the lack of touch sensitivity is dialled in via Voice Set. If you can get to Voice Set or Edit in these E keyboards you may be able to raise the Touch Sensitivity "Depth" to say 64, and reduce the "Offset" to a similar value and reintroduce touch sensitivity similar to other voices.
John
Hi John and Michael --
Good idea, but the E-series is challenged in this area. There are a few voice parameters accessible through "The Functions," but touch sensitivity is not among them.
I think that E4xx will respond to XG MULTIPART SysEx messages. Velocity sense depth and offset are accessible via SysEx:
08 nn 0C 1 00-7F VELOCITY SENSE DEPTH 0...127
08 nn 0D 1 00-7F VELOCITY SENSE OFFSET 0...127
Even tho' it's XG lite, the tone generator may respond none the less.
Of course, the issue is getting the instrument to store the modified voice...
All the best -- pj