code: func (b *Client) ServoConfig(pin int, max int, min int) error {
  	ret := []byte{
  		ServoConfig,
  		byte(pin),
  		byte(min & 0x7F),
  		byte((min >> 7) & 0x7F),
  		byte(max & 0x7F),
  		byte((max >> 7) & 0x7F),
  	}
  	return b.WriteSysex(ret)
  }
docs: // ServoConfig sets the min and max pulse width for servo PWM range