To simultaneously display a transfer state of substrates held on a substrate holding tool and detail-information thereof on the same screen. This involves a method in which a request to join a multicast group is received by an access point or other multicast transmitting device. Said metadata comprises a tempo metadata type having a tempo class value indicating a tempo class of the music track. When the target device is configured to operate in the second mode, the method includes allocating a reserved write buffer on the target device, and receiving write data from the host device using the write buffer. The corresponding set of constants represent a corresponding set of amplitudes.