It's possible to adjust the rim sensitivity of the mesh pads. The parameter for adjusting the rim sensitivity is called "Head/Rim" Adjust" in the TD-50. It adjusts the sensitivity balance between the head and rim of the pad. Here's how to access and adjust it:
1. Press the TRIGGER button.
2. Press the PAGE DOWN button to choose PAGE 2 ("2 TRIG ADVANCED").
3. Press the F2 button to select the RIM tab.
4. Cursor down to highlight the value for Head/Rim Adjust.
5. Hit the mesh pad (Snare, Tom) that you want to adjust.
6. Turn the dial to adjust the value. (0-80). A lower value makes the rim more sensitive.
7. Repeat Steps 5 and 6 for the remaining pads if desired.
8. Press the EXIT button when you're finished. The new settings are saved automatically.