Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

What Is Sound1.Ppt


Published on

  • Be the first to like this

What Is Sound1.Ppt

  1. 1. What is sound? To fully understand synthesisers, synthesis and samplers, we need to be familiar with the characteristics of sound.
  2. 2. What is sound? <ul><li>Sound is the sensation we perceive when vibrations in the air are detected by our ears. </li></ul><ul><li>Our ears convert these vibrations to electrical impulses. </li></ul><ul><li>These impulses are transmitted to our brain via our nervous system. </li></ul><ul><li>Our brain then distinguishes its 3 main characteristics. </li></ul>
  3. 3. What is sound? <ul><li>These 3 main characteristics are termed: </li></ul><ul><ul><li>Pitch </li></ul></ul><ul><ul><li>Timbre </li></ul></ul><ul><ul><li>Amplitude </li></ul></ul>
  4. 4. The 3 main characteristics of sound: <ul><li>1. Pitch </li></ul><ul><li>Pitch is determined by Frequency </li></ul><ul><li>Frequency is measured in Hertz (Hz) </li></ul><ul><li>Human ears perceive a range of frequencies - generally given as ranging from 20 Hertz to 20,000 Hertz (abbreviated to 20 kilo Hertz, or 20 kHz) </li></ul>
  5. 5. The 3 main characteristics of sound: <ul><li>2. Timbre </li></ul><ul><li>Timbre means ‘tonal characteristics’. </li></ul><ul><li>We distinguish between different sounds according to their timbre. </li></ul><ul><li>A piano and a saxophone, both playing at the same pitch and level, still sound different - this is because they each have a different timbre. </li></ul><ul><li>Our voices also have different timbres. </li></ul><ul><li>Timbre is determined by the frequency content of a sound. </li></ul>
  6. 6. The 3 main characteristics of sound: <ul><li>3. Amplitude </li></ul><ul><li>Amplitude is the loudness or volume of a sound. </li></ul><ul><li>Amplitude is measured in Decibels (dB) </li></ul><ul><li>Humans can perceive amplitude levels ranging from: </li></ul><ul><li>0dB (a leaf falling on the grass) up to </li></ul><ul><li>120dB (standing 20 paces from a jet engine!) </li></ul>
  7. 7. The 3 main characteristics of sound <ul><ul><li>Pitch, Timbre and Amplitude are the fundamental elements to understanding what is going on when you are creating and manipulating sound. </li></ul></ul>
  8. 8. Pitch <ul><li>Sounds can be: </li></ul><ul><ul><li>low in pitch - like a bass guitar </li></ul></ul><ul><ul><li>high in pitch - like a crash cymbal </li></ul></ul><ul><ul><li>Or have a range of pitches - like a piano </li></ul></ul><ul><ul><li>Synths often have a keyboard - enabling you to play a tone at different musical pitches. </li></ul></ul>
  9. 9. Timbre <ul><li>Sounds can be: </li></ul><ul><ul><li>Pure sounding - like a flute </li></ul></ul><ul><ul><li>Rich sounding - like a string section </li></ul></ul><ul><ul><li>Musical sounding - like any musical instrument </li></ul></ul><ul><ul><li>Non-musical - like machinery noise </li></ul></ul><ul><ul><li>Synths have many controls - enabling you to create different musical (and non-musical) timbres. </li></ul></ul>
  10. 10. Amplitude <ul><li>Sounds can be: </li></ul><ul><ul><li>Quiet sounding - like a triangle </li></ul></ul><ul><ul><li>Loud sounding - like a bass drum </li></ul></ul><ul><ul><li>Or they may change in level over time </li></ul></ul><ul><ul><li>Synths have amplitude controls - enabling you to control how loud a sound is over time. </li></ul></ul>
  11. 11. Timbre, Pitch and Amplitude <ul><li>Over the coming weeks we will look at the different ways that synths allow you to change these 3 fundamental characteristics. </li></ul><ul><li>You will learn how to: </li></ul><ul><ul><li>Create and shape your own unique sounds </li></ul></ul><ul><ul><li>Use these sounds in your own music </li></ul></ul>