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  2. RIAA equalization - Wikipedia

    en.wikipedia.org/wiki/RIAA_equalization

    For example, in Europe, for many years recordings required playback with a bass turnover setting of 250 to 300 Hz and a treble rolloff at 10,000 Hz ranging from 0 to −5 dB, or more. In the United States, practices varied and a tendency arose to use higher bass turnover frequencies, such as 500 Hz, as well as a greater treble rolloff such as ...

  3. ITU-R 468 noise weighting - Wikipedia

    en.wikipedia.org/wiki/ITU-R_468_noise_weighting

    ITU-R 468 (originally defined in CCIR recommendation 468-4, therefore formerly also known as CCIR weighting; sometimes referred to as CCIR-1k) is a standard relating to noise measurement, widely used when measuring noise in audio systems.

  4. International Standard Recording Code - Wikipedia

    en.wikipedia.org/wiki/International_Standard...

    The International Standard Recording Code (ISRC) is an international standard code for uniquely identifying sound recordings and music video recordings.The code was developed by the recording industry in conjunction with the ISO technical committee 46, subcommittee 9 (TC 46/SC 9), which codified the standard as ISO 3901 in 1986, and updated it in 2001.

  5. Audio system measurements - Wikipedia

    en.wikipedia.org/wiki/Audio_system_measurements

    A component having a flat frequency response will reproduce content at all frequencies across the specified frequency range at the same intensity. The frequency range often specified for audio components is between 20 Hz to 20 kHz, which broadly reflects the human hearing range.

  6. List of music recording certifications - Wikipedia

    en.wikipedia.org/wiki/List_of_music_recording...

    Music recording certifications are typically awarded by the worldwide music industry based on the total units sold, streamed, or shipped to retailers. These awards and their requirements are defined by the various certifying bodies representing the music industry in various countries and territories worldwide. The standard certification awards ...

  7. Noise curve - Wikipedia

    en.wikipedia.org/wiki/Noise_curve

    The result is determined by the lowest curve which is not touched by the measured spectrum at any position in the audio frequency range. Noise curves serve as uniform measuring standards and are referred to by many noise regulations covering a variety of locations from concert halls, rock concerts, lecture rooms and offices to clay target ...

  8. Interval ratio - Wikipedia

    en.wikipedia.org/wiki/Interval_ratio

    In music, an interval ratio is a ratio of the frequencies of the pitches in a musical interval. For example, a just perfect fifth (for example C to G) is 3:2 (Play ⓘ), 1.5, and may be approximated by an equal tempered perfect fifth (Play ⓘ) which is 2 7/12 (about 1.498).

  9. Musical tone - Wikipedia

    en.wikipedia.org/wiki/Musical_tone

    Traditionally in Western music, a musical tone is a steady periodic sound. A musical tone is characterized by its duration, pitch, intensity (or loudness), and timbre (or quality). [1] The notes used in music can be more complex than musical tones, as they may include aperiodic aspects, such as attack transients, vibrato, and envelope modulation.