Abstract: A recording apparatus comprises a recording device, a changing device, a storage device and a control device. The recording device records recording data on a recording medium. The changing device receives a plurality of recording media supplied from an outside, selects one of the plurality of recording media as received and replaces the first recording medium loaded in the recording device with the second recording medium as selected. The storage device stores, during replacement of the first recording medium, the recording data recorded thereon. The control device controls the recording device and the changing device, monitors a remaining recording capacity or recording time of the first recording medium during recording, causes the first recording medium to be replaced based on monitoring results, and reads, after completion of the replacement of the first recording medium, the recording data of the first recording medium from the storage device and records same on the second recording medium.

Abstract: A steel wire for making a high strength steel wire product which contains 0.6-1.1% C, 0.2-0.6% Si, 0.3-0.8% Mn, and impurities of max 0.010% P, max 0.010% S, max 0.003% O(oxygen), and max 0.002% N, and has a structure in which the maximum pearlite block size is 4.0 .mu.m, the maximum separation distance in pearlite lamellars is 0.1 .mu.m, and the maximum content of free ferrite is 1% by volume.The steel wire can be manufactured in the process as follows;1 heating a steel wire rod having above-mentioned chemical composition to the austenite range above Ac.sub.3 point or A.sub.cm point,2 initiating plastic deformation to not less than 20% total reduction in cross-sectional area in the temperature range 850.degree. C. -750.degree. C.,3 finishing plastic deformation in the range below Ae.sub.1 point and above 650.degree. C., and4 continuously cooling to a range lower than 650.degree. C. and higher than 550.degree. C., and thus transforming into pearlite phase.

Abstract: A karaoke device which automatically returns the level of a microphone volume to a presettled level at the beginning or end of individual music pieces, and which is capable of gradually reducing the gain of the microphone amplifier by a predetermined value when an output volume from the microphone amplifier becomes excessively loud during the playing of a music piece. The karaoke device includes an adjustor for adjusting the level of the microphone volume in accordance with a manual instruction or an instruction from a control circuit; a level detector for detecting when the volume level is greater than a predetermined level; a music piece detector for detecting a beginning or end of each music piece; and a control circuit that compares a standard volume level and the volume level of when a detected signal is outputted from the music piece detector, and controls the adjustor to equalize the output level to the previously stored standard level.