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The actual ingest from the 78 RPM records to the digital tape was also done in real-time. The computer processing to clean up the surface noise, pops and scratches took the early computers quite some time to process. By the late 1970s, 3M introduced the first digital multitrack recorder. It used 1-inch (25 mm) wide specially formulated tape and ...
Between the invention of the phonograph in 1877 and the first commercial digital recordings in the early 1970s, arguably the most important milestone in the history of sound recording was the introduction of what was then called electrical recording, in which a microphone was used to convert the sound into an electrical signal that was ...
The tape was 0.1 inches (2.5 mm) wide and 0.003 inches (0.076 mm) thick running at 5 feet per second (1.5 m/s) past the recording and reproducing heads. This meant that the length of tape required for a half-hour program was nearly 1.8 miles (2.9 km) and a full reel weighed 55 pounds (25 kg).
The first CrO 2 cassette was introduced in 1970 by Advent, [97] and later strongly backed by BASF, the inventor and longtime manufacturer of magnetic recording tape. [98] Next, coatings using magnetite (Fe 3 O 4 ) such as TDK 's Audua were produced in an attempt to approach or exceed the sound quality of vinyl records .
A reel-to-reel tape recorder from Akai, c. 1978. An audio tape recorder, also known as a tape deck, tape player or tape machine or simply a tape recorder, is a sound recording and reproduction device that records and plays back sounds usually using magnetic tape for storage.
The 8-track tape (formally Stereo 8; commonly called eight-track cartridge, eight-track tape, and eight-track) is a magnetic-tape sound recording technology that was popular [2] from the mid-1960s until the early 1980s, when the compact cassette, which pre-dated the 8-track system, surpassed it in popularity for pre-recorded music.
The tape is wrapped around the head drum, using a little more than 180 degrees of the drum. One of the heads on the spinning drum records one field of video onto the tape, in one diagonally oriented track. The tape passes across the audio and control head, which records the control track and the linear audio tracks.
A comparison of sizes for the Microcassette and Minicassette Analog, 1 ⁄ 8 inch wide tape, used generally for note taking, mostly mono, some stereo (developed in the early '80s). 2.4 cm/s or 1.2 cm/s Minicassette: Analog, 1 ⁄ 8 inch wide tape, used generally for note taking, 1.2 cm / s: 1970 Quadraphonic 8-Track (Quad-8) (Q8)