This exercise is all about using Adobe Audition to manipulate  music samples in the multitrack.  It covers

  • Creating project folder
  • Creating a session file
  • Importing clips
  • Creating a basic 3 track arrangement lasting around 2 minutes
  • Looping clips
  • Panning two tracks
  • Fading tracks in and out
  • Adding reverb effect
  • Adding chorus effect
  • Adjusting audio levels for a final mix
  • Mixing down to a final master
  • Adding compression and equalisation to the master
  • Saving final mix as a wav file

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Audio Editing Activities

January 26, 2010


For this unit you will cover the following for your assessment

Audio Theory

  • multiple choice questions

Basic Recording & Editing

  • Record and edit 5 audio clips

Manipulation Audio clips

  • fade in and out
  • normalise
  • compress
  • Equalise
  • mix multiple track levels
  • Reverb
  • Chorus
  • Flange

Audio Pictures

  • Re-create the sounds that you would hear for given images.

Video Soundtrack

  • Create a soundtrack for a given silent piece of video.

All your audio files need to be kept safe in a project folder.

Regularly make notes about what you are doing and the theory you will cover.

Write a short evaluation of your work for this unit.

This will all be supported by short theory lectures and practice exercises.

Audio Recording project

December 1, 2009


Simple project to record a variety of sounds using a portable audio recorder such as the Zoom H2

Make sure you are familiar with

  • Switching on the recorder.
  • Choosing the set of mics you want use
  • Monitoring the audio input
  • Setting the audio recording levels
  • Making a recording that has a minimum of unwanted extra noises i.e your hand holding the mic or rustle of your clothing.
  • Switch off  the recorder
  • Transfer files to a PC

Make 10 good quality recordings of the following

  • Birds/animals
  • Traffic
  • Door opening
  • Door closing
  • People in a large space
  • Footsteps (various surfaces)
  • Machinery/workshop

Transfer the audio files into a folder you have created on a PC, rename them according to what they are a recording of,  and put them together using an application such as Adobe Audition or Premier Pro

Save the session/project file in the folder and submit the folder for assessment.

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College Life Project

November 26, 2009


Audio visual project brief  for HN Unit Audio & Video 1 DF66 34


The object of this exercise is to concentrate on the audio layers within a movie. To do this you are going to work with some still images and imagine the sounds that you would hear within the scene. In this case use three cards from the Mars Attacks bubblegum card set.

Pick card scenes that are going to allow you a lot of scope to create a densely layered soundtrack. Remember there are three basic layers in a soundtrack

Sound Effects
Music
Dialogue

Insert your choice of cards into a word document and write about what you think would be heard within the scene. This becomes your plan for sourcing and editing your audio sample files

As usual, create a project folder to keep all your files in and then create a project in Premier Pro. Create three scenes on the timeline each lasting approximately 20 seconds. Include titles and credits. Export your final movie in DV AVI format.

marsAttacksSoundExercise2002

Digital Audio Technology 1

September 21, 2009


Some useful concepts to help you to understand the technology behind working with digital audio.

Pulse Code Modulation

Pulse-code modulation (PCM) is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a numeric (usually binary) code

Sampling

In signal processing, sampling is the reduction of a continuous signal to a discrete signal.

A common example is the conversion of a sound wave (a continuous-time signal) to a sequence of samples (a discrete-time signal).

Sample rate

When it is necessary to capture audio covering the entire 20–20,000 Hz range of human hearing, such as when recording music or many types of acoustic events, audio waveforms are typically sampled at 44.1 kHz (CD), 48 kHz (professional audio), or 96kHz. The approximately double-rate requirement is a consequence of the Nyquist theorem.

Quantization

Quantization can be thought of as mapping a signal with a continuous set of sample values to a set of discrete values.

Or,  its a way of approximating a very large range of values by a relatively small (“finite”) set of (“values which can still take on continuous range”) discrete symbols or integer values.  For example binary code in a computer.

For digital audio both of these steps (sampling and quantizing) are performed in analog-to-digital converters (ADC) with the quantization level specified in bits. This is known as resolution or bit depth of the sample.

The resolution of the converter indicates the number of discrete values it can produce over the range of analog values. The values are usually stored electronically in binary form, so the resolution is usually expressed in bits. In consequence, the number of discrete values available, or “levels”, is usually a power of two.

For example, an ADC with a resolution of 8 bits can encode an analog input to one in 256 different levels, since 28 = 256. The values can represent the ranges from 0 to 255.

Quantization introduces digital noise!  This is in addition to the noise that exists in all analog electrical circuits.

The Signal to Noise Ratio (SNR) is a ratio of the signal power to the noise power corrupting the signal.

There is a relationship between quantization noise and SNR that has direct effect on the qulity of the audio sample.

Online Remixing

March 30, 2009


YourSpins is a site that lets you remix existing artists work.  It uses a multitrack mixer where you can adjust volume levels and change instruments or sound effects