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Pan/Expand controls

The following controls are located in the Pan/Expand dialog if you are using the full version of Sound Forge, or the Graphic Pan dialog if you are using Screenblast Sound Forge.

Process mode drop-down list

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

Option

Description

Pan (preserve stereo

Applies the pan effect without mixing the channels, thereby simulating the spectral

separation)

positioning of stereo recordings.

Pan (mix channels before

Mixes the left and right channels prior to applying panning effects.

panning)

 

 

 

Stereo expand

Available only in the full version of Sound Forge. 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)

Available only in the full version of Sound Forge. Simulates a recording technique in

recording to left and right

which one microphone is pointed directly at the source and used to record the center

channels

(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 in Sound Forge, 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 165.

•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.

CHP. 10

PROCESSING AUDIO