Pan/Expand controls

The following controls are located in the Pan/Expand dialog.

Control

Description

Process mode

The Process mode drop-down list contains the following options:

 

• Pan (preserve stereo separation) Applies the pan effect without mixing the

 

channels, thereby simulating the spectral positioning of stereo recordings.

 

• Pan (mix channels before panning) Mixes the left and right channels prior to

 

applying panning effects.

 

• Stereo expand Allows you to contract or expand the image of stereo audio from

 

dead center (mono) to completely panned wide (no center channel).

 

• Mix mid-side (MS) recording to left and right channels Simulates a recording

 

technique in which one microphone is pointed directly at the source and used to

 

record the center (mid) channel, and a second microphone is pointed 90 degrees

 

away from the source (side) and used to record the stereo image.

 

For proper playback on most systems, MS recordings must be converted to

 

standard left/right orientation.

 

To convert an MS-recorded track to a left/right track, first ensure that the center

 

channel is in the left track and the side channel on the right. The MS mix function is

 

then used to set the width of the stereo image for the converted track.

 

 

Output gain

Determines the amount of gain applied to the signal following pan/expand

 

processing.

 

 

Show wave

The Show wave drop-down list provides several settings for drawing the current

 

selection’s waveform on the envelope graph. This function is available only for small

 

selections.

 

 

Reset Envelope

Clicking the Reset Envelope button clears all but the two original envelope points.

 

• For the Pan modes, these two points prevent unintended panning.

 

• For the Stereo expand and Mix Mid-Sidemodes, these two points prevent

 

unintended expansion.

 

 

Resample

The Resample command allows you to change the sampling rate of a file without altering its pitch or duration.

•Resampling to a lower sample rate results in less frequent samples and a decreased file size, but adds aliasing noise to the audio. For more information, see Apply an anti-alias filter during resample on page 190.

•Resampling to a higher sample rate results in extra samples being created through interpolation and an increased file size. Like increasing bit depth, up-sampling does not improve the quality of an audio file, but permits subsequent audio processing to be performed with greater precision.

PROCESSING AUDIO 189