Abstract: To provide a microphone unit for stereophonic recording capable of adjusting an intersecting angle of sound collecting axes in accordance with conditions without impairing directivity and sound quality of the microphone. Respective rotation bases (408, 508) are rotatable about a center axis with respect to mounting bases (404, 504), respectively, which are mounted to a main body (20) of a portable sound recorder (10) through respective brackets (402, 502). Respective top ends of respective knurls (414, 514) of leading ends of the respective rotation bases (408, 508) has a shape being cut to form an inclined surface from a radial direction, and respective microphones (418, 518) are retained so that diaphragms (420, 520) are in consonance with the cut surface.

Abstract: Provided are a multitrack recorder and a synchronous recording method that are capable of exchanging a clock and a control message in synchronous recording using two multitrack recorders only by connecting therebetween by one signal line. The multitrack recorder capable of performing the synchronous recording between the two multitrack recorders (a master MTR (10) and a slave MTR (20)) by transmitting/receiving the packetized control message by USB communications corresponding to a bidirectional serial communication scheme includes: an SOF packet detecting section (14, 24) for detecting an SOF packet included in one of transmission data and reception data at predetermined periods; and an audio clock generating section (16, 26) for generating an audio clock that is synchronized with the SOF packet detected by the SOF packet detecting section (14, 24), and outputting the audio clock to a control section for controlling an operation of the multitrack recorder.

Abstract: To provide a microphone unit for stereophonic recording capable of adjusting an intersecting angle of sound collecting axes in accordance with conditions without impairing directivity and sound quality of the microphone. Respective rotation bases (408, 508) are rotatable about a center axis with respect to mounting bases (404, 504), respectively, which are mounted to a main body (20) of a portable sound recorder (10) through respective brackets (402, 502). Respective top ends of respective knurls (414, 514) of leading ends of the respective rotation bases (408, 508) has a shape being cut to form an inclined surface from a radial direction, and respective microphones (418, 518) are retained so that diaphragms (420, 520) are in consonance with the cut surface.