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Optonica amplifier (SM-3636) and tuner (ST-3636) from 1978. The Optonica brand was created and first launched by Sharp of Japan in 1975 to compete in the high-end audio market along with established brands such as Sansui Electric, Sony, Panasonic, Sanyo, Yamaha, Nakamichi, Onkyo, Fisher Electronics, Technics (brand), Pioneer Corporation, Kenwood Corporation, JVC, Harman Kardon and Marantz.
A tonearm with the dial for anti-skating adjustment.. Turntable anti-skating is a feature used in phonograph turntables to prevent skating of the tonearm.. Due to the offset between the cartridge's axis (which is approximately tangential to the disc) and the tonearm's pivot, the force applied (through friction) by the rotating disc to the cartridge tends to draw the tonearm toward the center ...
The CD-4 record track is broader than a conventional stereo track, so the playing time is less than a conventional stereo record. The audio frequencies (20 Hz to 15 kHz), often referred to as the sum channel, would contain the sum of the left front plus left back signals in the left channel and the sum of the right front plus the right back ...
A gap in the control track signal of a videotape usually causes a flaw during playback, as the player may lose tracking as soon as the track drops out. This usually leads to a gap in video and audio (since there's no information as to what speed the media is recorded at), the VCR's counter will freeze, and upon re-acquiring the control track ...
A special bit in the linear timecode frame, the biphase mark correction bit, ensures that there are an even number of AC transitions in each timecode frame. The sound of linear timecode is a jarring and distinctive noise and has been used as a sound-effects shorthand to imply telemetry or computers.
The World Record Controller was an attachment for ordinary record players that slowed the turntable down when playing the outside of the record and allowed it to gradually speed up as the needle was carried inward by the groove. Of course, only special World records could be used. The World system was a commercial failure.
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It records audio on 3 linear tracks, and control signals on a linear track. Unlike conventional type C videotape recorders, Vertical Blanking Intervals are not recorded on the tape. Helical tracks have groups of 4 signals or channels, arranged side by side and length-wise with red chrominance, blue chrominance, and two green chrominance signals ...