Derek, sorry for the late reply. No, the resistor value has no influence on the tome. The tone is generated digitally by the microcontroller at a frequency hard-coded into the software. You can lower the value of the resistor on your bum key by adding that second resistor in parallel. This will lower the resistance across the key. You can try this by just holding the leads in place across the pads. Tricky, but a quick check. If you want to increase the resistance, you will have to pull out that resistor again and replace it with a higher value. You can’t hurt anything with different resistor values, and the magic number may vary from unit to unit, so experiment.