Sound for Interaction class 8

Audio Effects

We can only affect three things:

Amplitude

Time

Frequency

Each of the effects that we will look at can affect many or just one of these properties.

Many Digital Audio Effects run in real time. Their are several different kinds of real time effects.

DirectX/VST- non destructive real time effects like TDM but runs on CPU

DirectX and TDM effect are restricted by the amount of processing power.

TDM's run on a single dedicated processor and DirectX effects run on the CPU.

Demo

EQ Presentation

An Equalizers main goal is it to effect the frequency of an audio signal.

• • http://www.canimi.com/webnew/audiospectruma.html
  • EQ by the Octave
  • Eq Primer

Equalization

High Pass Filter

A High pass filter will allow frequencies above a certain point to pass through the fliter.High-pass_filter

Low Pass Filter

A Low Pass filter only allow frequencies below a certain frequency to pass through. Low-pass filter

Band Pass Filter

A band pass filter is a filter the allows a range of frequencies to pass through Bandpass_filter

Simple EQ

Simple Graphic EQ

Sound Forge Graphic EQ

notice there is one slider for each BandPass/BandCut Filter

Paragraphic Sound Forge

The sound forge Paragraphic EQ consists of 4 parametric Equalizers, a low pass Equalizer, and a high pass EQ.

Eq Frequency Ranges http://www.recordingeq.com/EQ/req0400/OctaveEQ.htm

EQ Primer http://www.recordingwebsite.com/articles/eqprimer.php

Assign Effects

MTD2 Group Audio Effects presentations.

Your book and these links may help

http://www.harmony-central.com/Effects/audio-effects-faq-10.txt

http://www.harmony-central.com/Effects/effects-explained.html

You may also try pressing F1 (help) in soundforge and searching for you effect.

Or reading chpater 3 in the Sound Design for Interactive Media

Home Work

Sound for Interaction Voice Recording

Assign Effects You book and these links may help

http://www.harmony-central.com/Effects/audio-effects-faq-10.txt

http://www.harmony-central.com/Effects/effects-explained.html

http://users.iafrica.com/k/ku/kurient/dsp/effects.html