Hey flet, if you read page 58 of the the manual you will find the following:
Key Range: These two fields determine the MIDI note range that
will trigger the current Cell. For example, a key range of C2-C2
means that the Cell will play only upon receiving MIDI note C2. If
set to C1-E1, then C1, C#1, D1, D#1, and E1 will all trigger the
Cell (see the Track section for info on whether these different notes
will change the Cell’s pitch).
There are two ways to set the Key Range:
• Double-click on the low range and type in a new note name or
numeric value. If you type in a numeric value, BATTERY 2 will
automatically convert it to a “musician-friendly” MIDI note
name (for example, type “60,” and the display will show C3).
If necessary, do the same for the high range. Using this
method does not change the root key.
• Click on the Learn button. Use a keyboard or other MIDI note
generator to play first the low range note, then the high range
note. After playing the second note, the display will update to
show the new key range. With this method the root key will be
changed to the low note.
I know everyone on the BBS breaks out in a rash if they actually read a manual but sometimes, its the only way
I just tried this and it worked, so give it a go and report back.