Abstract: A data recorder has a built-in medium recorder and a portable medium recorder. The data recorder has an optical disk drive section and a HDD section. In addition to having a mode for recording data in either of the mediums, the data recorder has a mode for simultaneously recording data in both the mediums. A pair of directories in an HD and an optical disk, where data are to be recorded, is stored as relevance information in the HD. In the case of second simultaneous recording or subsequent simultaneous recording, a reference is made to the relevance information, thereby automating location of directories where data are to be recorded simultaneously and obviating selecting operation.

Abstract: A data duplicator capable of copying data to a plurality of types of disk. Data are read from a source disk which serves as a source of duplication, and the read data are temporarily saved as FAT data in a hard disk drive. The type of a target disk which is loaded on a DVD drive and which serves as a destination of duplication is determined, and the disk is converted into a file system format conforming to the type of the disk, and the data are copied to the target disk.

Abstract: In digital mixers and other signal processing apparatus, visual confirmation of signal transmission paths is difficult. A signal processing apparatus is provided with digital signal processing and control means 3, including a DSP and CPU, between input means 1a through 1f and output means 2a and 2b. The signal processing and control means 3 is connected to operation means 4, including a plurality of operation buttons, and to display means 5, including a plurality of display devices. The signal processing and control means 3 includes a plurality of mixer means 26a through 261 and display control means 5a. A plurality of operation buttons are used to form a plurality of signal transmission paths. A plurality of display devices provided in correspondence with a plurality of operation buttons, have a function to display operation of the operation buttons, and in addition are also used to display signal transmission paths.