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  2. Piano key frequencies - Wikipedia

    en.wikipedia.org/wiki/Piano_key_frequencies

    The normal 88 keys were numbered 1–88, with the extra low keys numbered 89–97 and the extra high keys numbered 98–108. A 108-key piano that extends from C 0 to B 8 was first built in 2018 by Stuart & Sons. [4] (Note: these piano key numbers 1-108 are not the n keys in the equations or the table.)

  3. List of Casio keyboards - Wikipedia

    en.wikipedia.org/wiki/List_of_Casio_keyboards

    12 D (x6) in/out/thru Has Digital Reverb and "Tone Editor" with detune, delay, attack/decay and release. Also released as the PMP-700 as part of Casio's "Professional" line. [49] CT 700 1992 61 full 100 12 D (x6) in/out Has sustain jack. [50] [51] CT 770 1992 61 full 100 12 D (x6) in/out Has Digital Reverb with editable parameters. [52] [46] CT ...

  4. Casio VL-1 - Wikipedia

    en.wikipedia.org/wiki/Casio_VL-1

    Casio VL-Tone VL-1. The VL-1 was the first instrument of Casio's VL-Tone product line, and is sometimes referred to as the VL-Tone. It combined a calculator, a monophonic synthesizer, and sequencer. [1] Released in 1981, [2] it was the first commercial digital synthesizer, [3] selling for $69.95. [4]

  5. Clock face - Wikipedia

    en.wikipedia.org/wiki/Clock_face

    '12:14' in both analog and digital representations. In the analog clock, the minute hand is on "14" minutes, and the hour hand is moving from "12" to "1" – this indicates a time of 12:14. A ship's radio room wall clock during the age of wireless telegraphy showing '10:09' and 36 seconds'. The green and red shaded areas denote 3 minute periods ...

  6. Casio AE-1000W - Wikipedia

    en.wikipedia.org/wiki/Casio_AE-1000W

    The AE-1000W has a 1/100 stopwatch which can count up to 24 hours (23:59'59.99") and has an elapsed time, split time and final time recording. The watch has an hourly chime mode and five daily alarms (also written on the face of the watch) for recurring events along with a one-time alarm which can be switched off using any button.

  7. 12-hour clock - Wikipedia

    en.wikipedia.org/wiki/12-hour_clock

    The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before midday") and p.m. (from Latin post meridiem, translating to "after midday"). [1] [2] Each period consists of 12 hours numbered: 12 (acting as 0), [3] 1, 2, 3, 4

  8. Casio - Wikipedia

    en.wikipedia.org/wiki/Casio

    Casio was established as Kashio Seisakujo in April 1946 by Tadao Kashio [] (1917–1993), an engineer specializing in fabrication technology. [1] Kashio's first major product was the yubiwa pipe, a finger ring that would hold a cigarette, allowing the wearer to smoke the cigarette down to its nub while also leaving the wearer's hands free. [6]

  9. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    24-hour digital clock in Miaoli HSR station. A public 24-hour clock in Curitiba, Brazil, with the hour hand on the outside and the minute hand on the inside.. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of ...