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  2. 10 Seconds (song) - Wikipedia

    en.wikipedia.org/wiki/10_Seconds_(song)

    "10 Seconds" is a song by American singer Jazmine Sullivan. It was written by Sullivan and Salaam Remi for her second studio album, Love Me Back (2010), with production helmed by the latter. It was released on October 15, 2010, as the album's second single and reached number 15 on the US Hot R&B/Hip-Hop Songs .

  3. Reference tone - Wikipedia

    en.wikipedia.org/wiki/Reference_tone

    In telecommunication, a standard test tone is a pure tone with a standardized level generally used for level alignment of single links and of links in tandem. [1]For standardized test signal levels and frequencies, see MIL-STD-188-100 for United States Department of Defense (DOD) use, and the Code of Federal Regulations Title 47, part 68 for other Government agencies.

  4. List of pitch intervals - Wikipedia

    en.wikipedia.org/wiki/List_of_pitch_intervals

    The extremes of the meantone systems encountered in historical practice are the Pythagorean tuning, where the whole tone corresponds to 9:8, i.e. ⁠ (3:2) 2 / 2 ⁠, the mean of the major third ⁠ (3:2) 4 / 4 ⁠, and the fifth (3:2) is not tempered; and the 1 ⁄ 3-comma meantone, where the fifth is tempered to the extent that three ...

  5. Greenwich Time Signal - Wikipedia

    en.wikipedia.org/wiki/Greenwich_Time_Signal

    There are six pips (short beeps) in total, which occur on each of the 5 seconds leading up to the hour and on the hour itself. Each pip is a 1 k Hz tone (about a fifth of a semitone above musical B5) the first five of which last a tenth of a second each, while the final pip lasts half a second. The actual moment when the hour changes – the ...

  6. Missing fundamental - Wikipedia

    en.wikipedia.org/wiki/Missing_fundamental

    Later, Waves Audio produced small subwoofers that relied on the missing fundamental concept to give the illusion of low bass. [25] Both products processed certain overtones selectively to help small loudspeakers, ones which could not reproduce low-frequency components, to sound as if they were capable of low bass.

  7. A440 (pitch standard) - Wikipedia

    en.wikipedia.org/wiki/A440_(pitch_standard)

    A440 (also known as Stuttgart pitch [1]) is the musical pitch corresponding to an audio frequency of 440 Hz, which serves as a tuning standard for the musical note of A above middle C, or A 4 in scientific pitch notation. It is standardized by the International Organization for Standardization as ISO 16.

  8. Low-frequency effects - Wikipedia

    en.wikipedia.org/wiki/Low-frequency_effects

    LFEs include both low-pitched musical notes and low-pitched sound effects. The musical soundtrack for many films includes bass instruments that produce very low notes. . Until the 1970s, most of the low-pitched instruments were natural, acoustic instruments, such as the double bass or the pipe organ's pedal key

  9. 4 Minutes - Wikipedia

    en.wikipedia.org/wiki/4_Minutes

    "4 Minutes" is a song by American singer Madonna from her eleventh studio album Hard Candy (2008), featuring vocals by fellow American singer Justin Timberlake and American producer Timbaland. It was released as the lead single from the album on March 17, 2008, by Warner Bros. Records .