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Kumkuma is a powder used for social and religious markings in India. It is made from turmeric or any other local materials. The turmeric is dried and powdered with a bit of slaked lime , which turns the rich yellow powder into a red color.
This was based on Fritz Pfleumer's 1928 invention of paper tape with oxide powder lacquered onto it. The first practical tape recorder from AEG was the Magnetophon K1, demonstrated in Berlin, Germany in 1935. Eduard Schüller of AEG built the recorders and developed a ring-shaped recording and playback head. It replaced the needle-shaped head ...
The turmeric powder becomes red when mixed with lime juice or lime powder. [5] Unlike red lead and vermilion, these are not poisonous. [ 5 ] [ 6 ] Modern material being sold as sindoor mainly uses vermilion, an orange-red pigment, the purified and powdered form of cinnabar , which is the chief form in which mercury sulfide naturally occurs.
AMPEX quadruplex VR-1000A, the first commercially released video tape recorder in the late 1950s; quadruplex open-reel tape is 2 inches wide The first portable VTR, the suitcase-sized 1967 AMPEX quadruplex VR-3000 1976 Hitachi portable VTR, for Sony 1" type C; the source and take-up reels are stacked for compactness. However, only one reel is ...
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A Dolby noise-reduction system, or Dolby NR, is one of a series of noise reduction systems developed by Dolby Laboratories for use in analog audio tape recording. [1] The first was Dolby A, a professional broadband noise reduction system for recording studios that was first demonstrated in 1965, but the best-known is Dolby B (introduced in 1968), a sliding band system for the consumer market ...
At first, only news broadcasters used tape for recordings since the quality was not good but eventually, recording studios and record labels starting using the format to record music and albums. The tape used by reel machines varied in size and formulation with various companies and even broadcasters using their own proprietary methods to ...
The higher the dynamic range of music, the more demanding it is of tape quality; alternatively, heavily compressed music sources can do well even with basic, inexpensive tapes. [8] Sensitivity of the tape, referred to that of an IEC reference tape and expressed in dB, was usually measured at 315 Hz and 10 kHz. [19] Stability of playback in time.