Sound for Interaction class 3
Contents
Amplitude Tools
Volume Tools in Sound Forge
Demo
- Volume Tool
- Mix tool
- Fade and Envolope
Volume Tools in Audacity
Demo
- Mutitrack
- Render
Adding Sound Waves Together
Demo
- Add simple sine wave and observer what happens
- invert the phase of one wave and add it again
Sine wave with the same frequency will add together and the amplitude will increase by 6dB. If the are inverted the will cancel each other out. If they are out of phase the will add or subtract relative to the degree of the phase shift.
Be careful when you are adding waves together. Since the amplitude. YOu never want the amplitude to increase above 0dB. This is cause clipping.
RMS
root mean square Abbr. rms, RMS Mathematics. The square root of the average of the squares of a group of numbers. A useful and more meaningful way of averaging a group of numbers.
from http://www.rane.com/par-r.html
The RMS averaging method is a better method for determining the amplitude of sound. Dynamic Range Definition @http://www.rane.com/par-d.html
The dynamic range of an audio system or and audio performance is the difference between the peak noise level and the noise floor.
Dynamic Range
Describes the difference between the Maximum and Minimum Values. in an Audio system it the the measure if the quitetest sound tha the system cam make (Noise Floor) a the loudest if can get(Peak Level).
Dynamic range = (Peak Level - Noise Floor)
in Digital audio it is determined by the number of bits.
Head Room
Definition @http://www.rane.com/par-h.html
The head room of an audio system is is the difference between the nominal level and the Peak level (or clipping point) Frequency Response Definition @http://www.rane.com/par-f.html
The range in frequency that an audio system or program contains or can pass between certain deviation.
