Fixing a default buzzroll tone mapping for Tenors Drum 1.

[factorone]

Considering this is for a change in a file that does not affect the build of either the primary application or the MDL extension itself, I'm not certain a new branch for this change is necessary. Normally, a more volatile change would warrant a new branch, but this is a low- or no-volatility change. However, if a new branch is required, just respond to this PR accordingly, and I'll do what's necessary to follow proper procedure.