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  2. Piano key frequencies - Wikipedia

    en.wikipedia.org/wiki/Piano_key_frequencies

    This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440).

  3. Scientific pitch notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_pitch_notation

    Thus, A 0 refers to the first A above C 0 and middle C (the one-line octave's C or simply c′) is denoted as C 4 in SPN. For example, C 4 is one note above B 3, and A 5 is one note above G 5. The octave number is tied to the alphabetic character used to describe the pitch, with the division between note letters ‘B’ and ‘C’, thus:

  4. Keyboard matrix circuit - Wikipedia

    en.wikipedia.org/wiki/Keyboard_matrix_circuit

    The inside of a Yamaha SY77 synthesizer shows the various internal components. The switches for each key are connected to the microprocessor chip using a matrix circuit. Even though the SY77 has 61 keys, only two small ribbon cables of wiring comes from the keyboard matrix. There are at least two limitations with this system.

  5. Musical keyboard - Wikipedia

    en.wikipedia.org/wiki/Musical_keyboard

    In a typical keyboard layout, black note keys have uniform width, and white note keys have uniform width and uniform spacing at the front of the keyboard. In the larger gaps between the black keys, the width of the natural notes C, D and E differ slightly from the width of keys F, G, A and B. This allows close to uniform spacing of 12 keys per ...

  6. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  7. Yamaha SY85 - Wikipedia

    en.wikipedia.org/wiki/Yamaha_SY85

    The workstation features a 61-note velocity-sensitive keyboard with aftertouch, a double density 3.5" floppy drive, a two line, 40 character LCD display, and a nine-track MIDI sequencer. It is a multitimbral synthesizer with 30-note polyphony and full MIDI capabilities. In addition to pitch and modulation wheels, the SY85 features eight ...

  8. AOL Mail for Verizon Customers - AOL Help

    help.aol.com/products/aol-mail-verizon

    AOL Mail welcomes Verizon customers to our safe and delightful email experience!

  9. 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.