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Digital Audio Files and Storage
Digital audio requires a large amount of disk storage. The table below shows the
disk space requirements in megabytes for a single minute of digital audio in mono
and stereo at various sampling rates:
Defragment your hard disk If your hard disk is fragmented, playback of audio will be
slower. Use the Disk Defragmenter to correct the
situation.
Turn off the Clip Audio Mix Upon
Overflow option on the Advanced tab
of the Audio Options dialog box.
Unless your mix is really distorted, you won’t usually
need this option.
Turn off the Apply Dither option on the
Advanced tab of the Audio Options
dialog box.
Dithering subtly improves your mix, but most people
can’t hear it. Turn it back on for mastering.
Enable disk caching By default, SONAR bypasses all disk caching, which
typically results in better performance with audio data. If
your computer has a very large amount of RAM (128
MB or more) and your audio tracks include many
repeated sections, enabling caching may improve
SONAR’s audio performance. Choose Options-Audio
and click the Advanced tab to change the disk cache
settings.
Record audio at a lower sampling rate If you don’t require CD quality 44.1 kHz audio, then
record your audio at a lower sampling rate of 22.05 kHz
or 11.025 kHz. Choose Options-Audio to change the
sampling rate. This method is useful only before you
start work on a project. Once the audio sampling rate for
a project has been set, it cannot be changed.
Disable the Display Clip Contents
options
Drawing the contents of audio clips in the Clips pane
uses some CPU cycles. If you are using a slow
machine, you may want to disable this feature. To do so,
right-click in the Clips pane, choose View Options, and
disable the Display Clip Contents option.
Sampling rate 16 bit 24 bit
11 kHZ Mono 1.3 MB per minute 1.9 MB per minute
11 kHZ Stereo 2.5 MB per minute 3.8 MB per minute
22 kHz Mono 2.8 MB per minute 3.8 MB per minute
22 kHz Stereo 5.0 MB per minute 7.6 MB per minute
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