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  2. Electro-Voice RE20 - Wikipedia

    en.wikipedia.org/wiki/Electro-Voice_RE20

    Frequency response 45 to 18,000 Hz Polar pattern Cardioid Sensitivity (at 1,000 Hz Open Circuit Voltage) 1.5 mV/Pascal Impedance 150 ohms Polarity Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 Connector Three-pin male XLR Switches Mid-bass reduction tone-shaping filter Net weight 737 grams (26.0 oz) [22]

  3. 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). [1] [2] Every octave is made of twelve steps called semitones.

  4. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz.

  5. General MIDI - Wikipedia

    en.wikipedia.org/wiki/General_MIDI

    35 Acoustic Bass Drum or Low Bass Drum; 36 Electric Bass Drum or High Bass Drum; 37 Side Stick; 38 Acoustic Snare; 39 Hand Clap; 40 Electric Snare or Rimshot; 41 Low Floor Tom; 42 Closed Hi-hat; 43 High Floor Tom; 44 Pedal Hi-hat; 45 Low Tom; 46 Open Hi-hat; 47 Low-Mid Tom; 48 High-Mid Tom; 49 Crash Cymbal 1; 50 High Tom; 51 Ride Cymbal 1; 52 ...

  6. Bass (sound) - Wikipedia

    en.wikipedia.org/wiki/Bass_(sound)

    Bass (/ b eɪ s / BAYSS) (also called bottom end) [2] describes tones of low (also called "deep") frequency, pitch and range from 16 to 250 Hz (C 0 to middle C 4) [3] and bass instruments that produce tones in the low-pitched range C 2-C 4. They belong to different families of instruments and can cover a wide range of musical roles. Since ...

  7. Room modes - Wikipedia

    en.wikipedia.org/wiki/Room_modes

    Most rooms have their fundamental resonances in the 20 Hz to 200 Hz region, each frequency being related to one or more of the room's dimensions or a divisor thereof. These resonances affect the low-frequency low-mid-frequency response of a sound system in the room and are one of the biggest obstacles to accurate sound reproduction.

  8. RIAA equalization - Wikipedia

    en.wikipedia.org/wiki/RIAA_equalization

    A recording is made with the low frequencies reduced and the high frequencies boosted, and on playback, the opposite occurs. The net result is a flat frequency response, but with attenuation of high-frequency noise such as hiss and clicks that arise from the recording medium. Reducing the low frequencies also limits the excursions the cutter ...

  9. Stringed instrument tunings - Wikipedia

    en.wikipedia.org/wiki/Stringed_instrument_tunings

    Essentially a 4-string bass with one added high or low string. Choice of tuning depends whether the added string is low or high. Guitar, bass (6-string) 6 strings 6 courses. Standard/common: B 0 E 1 A 1 D 2 G 2 C 3. Alternate: E 1 A 1 D 2 G 2 B 2 E 3. Bass, electric bass, 6-string bass, contrabass guitar Essentially a 4-string bass with either ...