Audio basics week 1


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Audio basics week 1

  1. 1. Audio Properties Introduction to Music Production – Week 1 ByJulianA. GomezC.
  2. 2. Introduction  Hi everyone! My name is Julian, I’m from Colombia, I am a 14 years old guy, coursing 8th grade on my school having a music focus-education.  I play the piano in my school’s orchestra, and on my Tropical Music band, and also I am learning to play the guitar.  In this presentation I will show teach you about the properties of the audio, taking in count Amplitude, Frequency and Timbre.
  3. 3. What is sound?  As we know sound is whatever we can hear, a voice, a door, a plane, a telephone, etc. Sound is a vibration that propagates through a medium such as air or water and it’s made from pressure variations in the air.  Everything sound we hear it’s produced by something, for example, a drum produces sound via a vibrating membrane, the voice produces sound through the vocal folds, etc.
  4. 4. Propagation of sounds  Sound moving through a medium is known as propagation.  Sounds moves through the air in a longitudinal wave pattern, but sometimes is represented as a transverse wave pattern.
  5. 5. Sound wave  A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium.  The sound wave includes several properties as Amplitude and Frequency.
  6. 6. Amplitude  Amplitude is the size of the vibration, and this determines how loud the sound is. The increase of the loudness is called compression, and a decrease is known as rarefaction.  Increasing or decreasing amplitude is called amplification /attenuation.
  7. 7. Amplitude  The Amplitude is measured in Decibels (dB).  Digitally, amplitude is measured as Decibels related to Full Scale (dBFS) which have a defined maximum available peak level (0).
  8. 8. Frequency  Frequency is the number of occurrences of a repeating event per unit time, measured in the number of wavelengths over a period of time.  The human perception of Frequency is known as pitch.
  9. 9. Frequency  In sound, frequency is measured in Hertz (Hz).  One cycle per second is 1Hz, ten cycle per seconds are 10Hz.  The range of human hearing is approximately: 20Hz-20.000Hz (2kHz).
  10. 10. Timbre  Timbre, also known as tone color or tone quality is the quality of a musical note or sound or tone that distinguishes different types of sounds, such as voices and musical instruments.  This sound characteristic is associated with the complexity of the sound wave reaching the ear, that is the overlap of the various harmonics and the respective relative intensity.
  11. 11. All these properties are needed to recognize the difference between music and noise.