The number of times per second it vibrates makes the frequency (the note, tone or pitch) of the sound you hear, and the distance it travels from it's resting point determines the gain (the volume or loudness) of the sound. The membrane of the speaker must vibrate from it's center position (at rest) backwards and forwards. It moves the air in front of it and makes a sound. The 'Digital System' in this case is Pure Data.įirst, imagine a loudspeaker. The 'Analog to Digital' & 'Digital to Analog Conversion' is done by the soundcard. We will return to these concepts in the audio tutorial later on.Ī diagram showing how sound travels through your computer.
Since we'll be using Pure Data to create sound, and since Pd treats sound as just another set of numbers, it might be useful to review how digital audio works.
