Information Technology Reference
In-Depth Information
The basic functions discussed in the previous paragraph will give you a start to
editing audio in Audition. Once the audio is edited, you should
Edit>Convert
Sample Type
to determine the best quality for the lowest file size. Converting
the sample will allow you to optimize the waveform at a lower sample rate and
determine if stereo or mono output is needed. Here is some information on
sample rates and data resolution sizes.
The following Web sample rates are acceptable for Flash on low to medium
bandwidth connections:
•
22,050 Hz —
great for voice-overs and monotone clips. Music can be
optimized at this rate but it should be used for shorter clips if performance
is an issue, which it is in a portfolio. (High end multimedia).
•
11,025 Hz —
great for smaller audio clips, music, and stereo. (Low end
multimedia).
•
For the Web, we can't go beyond here. These rates need very high
bandwidth or dedicated devices such as your DVD player
•
96,000 Hz —
DVD quality
•
48,100 Hz —
DAT (Digital Audio Tape) quality
•
44,100 Hz —
Cd quality
•
32,000 Hz —
Broadcast quality
Data Resolution sizes:
•
8 bit used for simple music, monotone or voice data.
•
16 bit used for music
•
32 bit used for CD quality music
For Flash output,
11025 kHz and 8 bit resolution
would perform best and
sound the worst.
22,050 with 16 bit resolution
would sound the best. You
need to find a happy medium that sounds good and is relatively small in file size
(under 1 MB, hopefully).
Try
22,050 and 8 bit
to accommodate clips that need quality. Use dither to
reduce noise created by low resolution. Lower sample rate results in a lower
pitch for the sound clip.
