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Magnetophon
Magnetophon was the brand or model name of the pioneering reel-to-reel tape recorder developed by engineers of the German electronics company AEG in the 1930s, based on the magnetic tape invention by Fritz Pfleumer. AEG created the world's first practical tape recorder, the K1, first demonstrated in Germany in 1935 at the Berlin Radio Show. A brief history of magnetic tape from the BASF Historian and the founding curator of the Ampex museum. Later models introduced the concept of AC tape bias, which improved the sound quality by largely eliminating background hiss. The resulting reproduction was so great an advance on any existing recording method that even those well acquainted with the industry could not tell the recordings from live play. Adolf Hitler Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician who was the dictator of Nazi Germany from 1933 until Death of Adolf Hitler, his suicide in 1945. Adolf Hitler's rise to power, He ros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reel-to-reel Tape Recorder
Reel-to-reel audio tape recording, also called open-reel recording, is magnetic tape audio recording in which the recording tape is spooled between reels. To prepare for use, the ''supply reel'' (or ''feed reel'') containing the tape is placed on a spindle or hub. The end of the tape is manually pulled from the reel, threaded through mechanical guides and over a tape head assembly, and attached by friction to the hub of the second, initially empty ''takeup reel''. Reel-to-reel systems use tape that is wide, which normally moves at . Domestic consumer machines almost always used or narrower tape and many offered slower speeds such as . All standard tape speeds are derived as a binary submultiple of 30 inches per second. Reel-to-reel preceded the development of the compact cassette with tape wide moving at . By writing the same audio signal across more tape, reel-to-reel systems give much greater fidelity at the cost of much larger tapes. In spite of the relative inconveni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tape Bias
Tape bias is the term for two techniques, AC bias and DC bias, that improve the fidelity of analogue tape recorders. DC bias is the addition of direct current to the audio signal that is being recorded. AC bias is the addition of an inaudible high-frequency signal (generally from 40 to 150 kHz) to the audio signal. Most contemporary tape recorders use AC bias. When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias, this response results in poor performance, especially at low signal levels. A recording signal that generates a magnetic field strength less than the tape's coercivity cannot magnetise the tape and produces little playback signal. Bias increases the signal quality of most audio recordings significantly by pushing the signal into more linear zones of the tape's magnetic transfer function. History Magnetic recording was proposed as early as 1878 by Oberlin Smith, who on 4 October 1878 filed, with the U.S. pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jack Mullin
John Thomas Mullin (October 5, 1913 – June 24, 1999) was an American pioneer in the field of magnetic tape sound recording and made significant contributions to many other related fields. From his days at Santa Clara University to his death, he displayed a deep appreciation for classical music and an aptitude for electronics and engineering. When he died in 1999, he was buried with a rosary and a reel of magnetic tape. A 2006 documentary movie, ''Sound Man: WWII to MP3'', was made about his life and contributions to sound recording. Work with the Signal Corps By 1943, German engineers had developed a high-quality form of magnetic tape sound recording that was unknown elsewhere. The Nazi radio networks used it to broadcast music and propaganda around the clock. From their monitoring of Nazi radio broadcasts during World War II, the Allies knew that German radio studios had some new kind of recorder that could reproduce high-fidelity sound in segments of unheard-of length ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ampex
Ampex Data Systems Corporation is an American electronics company founded in 1944 by Alexander M. Poniatoff as a spin-off of Dalmo-Victor. The name ''AMPEX'' is an acronym, created by its founder, which stands for Alexander M. Poniatoff Excellence.AbramsoThe History of television, 1942 to 2000– McFarland, 2003 – , page 286, Chapter 2, footnote 34 "1944 he founded Ampex (the name was created from his initials, AMP, plus "ex" for excellence)" Ampex operates as Ampex Data Systems Corporation, a subsidiary of Delta Information Systems, and consists of two business units. The Silicon Valley unit, known internally as Ampex Data Systems (ADS), manufactures digital data storage systems capable of functioning in harsh environments. The Colorado Springs, Colorado, unit, referred to as Ampex Intelligent Systems (AIS), serves as a laboratory and hub for the company's line of industrial control systems, cyber security products and services and its artificial intelligence/machine learnin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internationale Funkausstellung Berlin
The IFA ( ), or Internationale Funkausstellung Berlin (International radio exhibition Berlin, a.k.a. 'Berlin Radio Show'), is one of the oldest industrial exhibitions in Germany. Between 1924 and 1939 it was an annual event, but from 1950 it was held every other year until 2005. Since then it has become an annual event again, held in September. Today it is one of the world's leading trade shows for consumer electronics and home appliances. It offers the opportunity to exhibitors to present their latest products and developments to the general public. As a result of daily reporting in almost all the German media, the radio exhibition and the showcased technology receives a large amount of attention around the globe. In the course of its history, many world innovations were first seen at the exhibition. IFA is "Europe's biggest tech show". 245,000 visitors and 1,645 exhibitors attended IFA 2015. History German physicist and inventor Manfred von Ardenne Ardenne gave the world ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stereo
Stereophonic sound, commonly shortened to stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective. This is usually achieved by using two independent audio channels through a configuration of two loudspeakers (or stereo headphones) in such a way as to create the impression of sound heard from various directions, as in natural hearing. Because the multi-dimensional perspective is the crucial aspect, the term ''stereophonic'' also applies to systems with more than two channels or speakers such as quadraphonic and surround sound. Binaural sound systems are also ''stereophonic''. Stereo sound has been in common use since the 1970s in entertainment media such as broadcast radio, recorded music, television, video cameras, cinema, computer audio, and the Internet. Etymology The word ''stereophonic'' derives from the Greek (''stereós'', "firm, solid") + (''phōnḗ'', "sound, tone, voice") and it was coined in 1927 by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myron Stolaroff
Myron J. Stolaroff (August 20, 1920 – January 6, 2013) was an author and researcher who is best known for his studies involving psychedelic psychotherapy. He also conducted clinical studies that attempted to measure the effects of LSD, mescaline, and other drugs on creativity. Biography Stolaroff was born in Roswell, New Mexico. In 1941, he received a master's degree in electrical engineering from Stanford University. From 1942 through 1945, he held the title of Civilian Engineer at the Navy Department, Bureau of Ships. For the next fifteen years he worked for the recording equipment manufacturer Ampex, first as a senior design engineer, later as Director of Instrumentation Marketing, ultimately becoming responsible for long-range planning as Assistant to the President. Along with fellow Ampex engineer, Harold Lindsey, Stolaroff co-designed the Ampex Model 200A reel-to-reel tape recorder, which was based on a German Magnetophon modified by the audio engineer Jack Mullin. With ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AEG (German Company)
; AEG) was a German producer of electrical equipment. It was established in 1883 by Emil Rathenau as the ''Deutsche Edison-Gesellschaft für angewandte Elektricität'' in Berlin. The company's initial focus was driven by electrical lighting, as in 1881, Rathenau had acquired the rights to the electric light bulb at the International Exposition of Electricity in Paris. Using small power stations, his company introduced electrical lighting to cafés, restaurants, and theaters, despite the high costs and limitations. By the end of the 19th century, AEG had constructed 248 power stations, providing a total of 210,000 hp of electricity for lighting, tramways, and household devices. During the World War II, Second World War, AEG worked with the Nazi Party and benefited from forced labour from concentration camps. After the war, its headquarters moved to Frankfurt am Main. In 1967, AEG joined with its subsidiary Telefunken, Telefunken AG, creating ''Allgemeine Elektricitäts-Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fritz Pfleumer
Fritz Pfleumer (20 March 1881 – 29 August 1945) was a German engineer who invented magnetic tape for recording sound. Biography Pfleumer was born on 20 March 1881, in Salzburg, to Robert and Minna Pfleumer (née Hünich). His father Robert (1848–1934) was born in Greiz, and his mother Minna (1846–1932) was born in Freiberg, Saxony, Freiberg. Fritz had five siblings – Mimi, Hans, Hermann, Otto, and Mizi. Hans emigrated to the US. Pfleumer developed a process for putting metal stripes on cigarette papers and reasoned that he could similarly coat a magnetic stripe to be used as an alternative to wire recording. In 1927, after experimenting with various materials, Pfleumer used very thin paper that he coated with iron oxide powder using lacquer as glue. He received a patent in 1928. On 1 December 1932, Pfleumer granted AEG (German company), AEG the right to use his invention when building the world's first practical tape recorder, called Magnetophon K1. It was first demo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Strauss
Richard Georg Strauss (; ; 11 June 1864 – 8 September 1949) was a German composer and conductor best known for his Tone poems (Strauss), tone poems and List of operas by Richard Strauss, operas. Considered a leading composer of the late Romantic and early Modernism (music), modern eras, he has been described as a successor of Richard Wagner and Franz Liszt. Along with Gustav Mahler, he represents the late flowering of German Romanticism, in which pioneering subtleties of orchestration are combined with an advanced harmony, harmonic style. Strauss's compositional output began in 1870 when he was just six years old and lasted until his death nearly eighty years later. His first tone poem to achieve wide acclaim was ''Don Juan (Strauss), Don Juan'', and this was followed by other lauded works of this kind, including ''Death and Transfiguration'', ''Till Eulenspiegel's Merry Pranks'', ''Also sprach Zarathustra'', ''Don Quixote (Strauss), Don Quixote'', ''Ein Heldenleben'', ''Symph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reichs-Rundfunk-Gesellschaft
The Reichs-Rundfunk-Gesellschaft (RRG; ''Reich Broadcasting Corporation'') was a national network of German regional public radio and television broadcasting companies active from 1925 until 1945. RRG's broadcasts were receivable in all parts of Germany and were used extensively for Nazi propaganda after 1933. Historical recordings of RRG broadcasts are today held by the German Broadcasting Archive. History The company was established in Berlin on 15 May 1925 with a start capital of 100,000 Reichsmark as an umbrella organisation by nine regional broadcasters – that is to say, all of the German radio stations other than the Deutsche Stunde in Bayern – serving the various states of the Weimar Republic. From 1926, a majority share was held by the state-owned Deutsche Reichspost authority, represented by RF engineer and Reichspostministerium official Hans Bredow as chairman in the rank of a ''Reichs-Rundfunk-Kommissar''. The logo of the RRG was designed by German graph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
