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2. Unusual types of gramophone records - Wikipedia

   en.wikipedia.org/wiki/Unusual_types_of...

   The record featured two songs on the first side, and an etching of the album's promotional logo (a coiled centipede) on the second side. [citation needed] The Seeburg 1000 background music system (1959 to mid-1980s) used 9-inch, 16-rpm records with an unusual 2-inch center hole. Each record had a capacity of about 40 minutes per side. [citation ...

3. Microdot - Wikipedia

   en.wikipedia.org/wiki/Microdot

   A microdot is text or an image substantially reduced in size to prevent detection by unintended recipients. Microdots are normally circular and around 1 millimetre (0.039 in) in diameter but can be made into different shapes and sizes and made from various materials such as polyester or metal. The name comes from microdots often having been ...

4. Microdot (rapper) - Wikipedia

   en.wikipedia.org/wiki/Microdot_(rapper)

   Maikŭrotat. Shin Jae-ho ( Korean : 신재호; born November 21, 1993), [1] better known by his stage name Microdot ( Korean : 마이크로닷 ), is a South Korean–New Zealand rapper and singer. He debuted as a member of duo All Black, with Dok2, in 2006. [2] He has also appeared on Show Me the Money, [3] Unpretty Rapstar, [4] and Tribe of ...

5. Timeline of audio formats - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_audio_formats

   Timeline of audio formats. An audio format is a medium for sound recording and reproduction. The term is applied to both the physical recording media and the recording formats of the audio content —in computer science it is often limited to the audio file format, but its wider use usually refers to the physical method used to store the data.

6. History of sound recording - Wikipedia

   en.wikipedia.org/wiki/History_of_sound_recording

   Ring-and-spring microphones, such as this Western Electric microphone, were common during the electrical age of sound recording c. 1925–45.. The 'second wave' of sound recording history was ushered in by the introduction of Western Electric's integrated system of electrical microphones, electronic signal amplifiers and electromechanical recorders, which was adopted by major US record labels ...

7. Sound recording and reproduction - Wikipedia

   en.wikipedia.org/wiki/Sound_recording_and...

   Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording . Acoustic analog recording is achieved by a ...

8. Ambisonics - Wikipedia

   en.wikipedia.org/wiki/Ambisonics

   With the widespread availability of powerful digital signal processing (as opposed to the expensive and error-prone analog circuitry that had to be used during its early years) and the successful market introduction of home theatre surround sound systems since the 1990s, interest in Ambisonics among recording engineers, sound designers ...

9. Wire recording - Wikipedia

   en.wikipedia.org/wiki/Wire_recording

   Wire recording, also known as magnetic wire recording, was the first magnetic recording technology, an analog type of audio storage. It recorded sound signals on a thin steel wire using varying levels of magnetization. [1] [2] The first crude magnetic recorder was invented in 1898 by Valdemar Poulsen. The first magnetic recorder to be made ...