Advanced audio preferences

You can click the Advanced button on the Audio tab to access the advanced audio preferences.

Setting

Description

Audio devices

This list contains all of the audio devices that are installed in your computer. Select a device from the list

 

to set the options below for that device.

 

 

Interpolate position

When this check box is selected, the software will attempt to compensate for inaccurate devices by

 

interpolating the playback or recording position. If you notice that your playback cursor is offset from

 

what you are hearing, enable this option for the playback device.

 

 

Position bias

If the position of playback or recording does not match what you hear after you enable Interpolate

 

position, you can attempt to compensate using the Position bias slider.

 

Moving this slider will offset the position forward or backward to compensate for the inaccuracies of

 

the device.

 

 

Do not pre-roll buffers before

When this check box is selected, the software will not create buffers prior to starting playback. Some

starting playback

devices do not behave properly if this check box is cleared.

 

If your audio stutters when you start playback try selecting this check box.

 

 

Audio buffers

Drag the slider to set the number of audio buffers that will be used. Adjusting this setting can decrease

 

gapping or help you synchronize the input and output.

 

 

Buffer size

Choose a setting from the drop-down list to indicate the buffer size you want to use. Choose MME to

 

use the Playback buffering setting on the Audio tab in the Preferences dialog.

 

For example, if you choose MME from the Buffer size drop-down, set the Audio buffers slider to 5, and

 

set Playback buffering to 0.35 seconds, five 0.07-second buffers are created.

 

If you choose 1024 from the Buffer size drop-down and set the Audio buffers slider to 5, five 1024-byte

 

buffers are created.

 

 

Priority

Choose a setting from the drop-down list to set the priority that is assigned to your audio buffers.

 

Increasing the buffers’ priority can help you attain smoother playback, but it can also adversely affect

 

other processes.

 

 

Video tab

Use the Video tab to specify preferences for displaying video.

Item

Description

Frame numbering on thumbnails

Determines how individual frame information, located in a box at the lower left-hand corner of each

 

frame, will be displayed in the video strip when frame numbering is turned on.

 

The frame information box can include Frame Numbers or Media Timecode.

 

 

Allow pulldown removal when

Select this check box if you want to remove pulldown when you open 24 fps progressive-scan DV video

opening 24p DV

files.

 

When the check box is cleared, Sound Forge software will read 24p video as 29.97 fps interlaced video

 

(60i).

 

 

Deinterlace method

Choose a setting from the drop-down list to determine how Sound Forge software separates the two

 

fields that make up a video frame when you render to a progressive format:

 

• Blend Fields Maintains the data in the two fields by blending them together. This method can

 

produce a smooth, motion-blurred image.

 

• Interpolate Deletes one field and uses the remaining field to interpolate the deleted lines. This

 

produces sharper images than Blend Fields but can introduce jagged motion or stair-stepping

 

artifacts.

 

 

Resample source video when

Select this check box if you want to interpolate video frames when you render to a frame rate that is

rendering to a higher frame rate

greater than the source file’s frame rate.

 

 

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