On the Excalibur\Dash we have always been able to use Voice recording software but never been able to hear properly "very quiet" the person on the other side when listening to the recording.
The answer is a simple reg found by nick_martin to which mskip has .cab'd up for users.
Original thread & .cab: 2 Side Voice Recording on Kaiser **WORKS**
Just instal .cab reboot phone use with any voice recorder
I have tested this on RoseRom with VITO AudioNotes 1.32, will test with Kavana but if someone beatz me to it then post result.