A method and apparatus for processing multi-channel audio signals in which the channels are processed by one of alternatively selectable processes to produce an alternatively selectable number of output channels, the process being responsive to information contained in the input signal. A transmission control device of a motorcycle includes a shift-change control instruction part that performs an automatic shift change of an AMT in response to at least vehicle-speed information. The base portions are adapted to cooperatively engage wires of the support tray. Vehicle information and diagnostic data from one or more connected services may be received from the vehicle computing system and transmitted via a diagnostic connection to the diagnostics server.