A small modification to the core will move tone to a different timer. The relevant section is here...
https://github.com/arduino/Arduino/blob/master/hardware/arduino/cores/arduino/Tone.cpp#L88
Change the appropriate tone_pin_to_timer_PGM.
A small modification to the core will move tone to a different timer. The relevant section is here...
https://github.com/arduino/Arduino/blob/master/hardware/arduino/cores/arduino/Tone.cpp#L88
Change the appropriate tone_pin_to_timer_PGM.