Keyboard Scale Adjustment

1. Allow unit to warm up for 15 minutes.
2. Set GLIDE control R13 at minimum.
3. Use DVM to monitor voltage at the tip of the KEYBOARD IN/OUT jack J1.
4. Alternately depress low F and high C keys.
5. Adjust "Keyboard Scale Trim" R24 for a 2.58 VDC difference.

Source: Rogue — moog-rogue-service-manual (manual)