double ledcWriteNote(uint8_t channel, note_t note, uint8_t octave)

As an AI language model, I do not have access to the full context of your code, but based on the function name and parameters, it seems that this function is used to write a note to a specific LEDC channel.

The parameters of the function are:
- channel: the LEDC channel to write the note to
- note: the musical note to write
- octave: the octave of the note to write

The function returns a double value, which is not clear what it represents without further context.

A possible implementation of this function could be:

double ledcWriteNote(uint8_t channel, note_t note, uint8_t octave) {
  // Calculate the frequency of the note based on the octave
  double frequency = calculateFrequency(note, octave);

  // Write the frequency to the LEDC channel
  ledcWrite(channel, frequency);

  // Return a value indicating success
  return 1.0;
}

In this implementation, the function first calculates the frequency of the desired note based on the octave using a helper function `calculateFrequency()`. It then uses the `ledcWrite()` function to write the frequency to the specified LEDC channel. Finally, it returns a value of 1.0 to indicate that the note was successfully written.