User Guide

SETTING UP WAVE DEVICES
THE SOUND MAPPER/WAVE MAPPER
Sound Forge XP allows you to choose any installed Windows compatible sound
card for playback and recording. It also provides one more option for playback
and record called the Sound Mapper (depending on your configuration, this may
be called the Wave Mapper). The Sound Mapper is a special device that attempts to
select the most appropriate sound card (map) on which to play a sound. If this
card is not available, it will translate the sound into a format that can be played
on your sound card.
If you are having problems with breakups this may be caused by the overhead
introduced when the Sound Mapper does format conversions.To check this, make
sure that your sound card supports the data format you are playing or
recording. The easiest way to do this is to choose a playback and record device
that is not the Sound Mapper. If Sound Forge XP is able to play and record the
sound using the actual sound card’s Wave driver, then the Sound Mapper is not
causing the breakups.
However, if the Sound Mapper must be selected to play or record the format that
you are having trouble with, then you should convert your sound data to a
format that is directly supported by your sound card. This will remove all
overhead required to translate the sound data for your sound card.
There is nothing wrong with using the Sound Mapper when your sound card
directly supports the sound data format. The Sound Mapper will pass the data
through to your sound card, which requires negligible overhead. For more
information on the Sound Mapper, refer to Appendix E, Sound Forge XP and The
Microsoft Audio Compression Manager. The Sound Mapper is a component of the Audio
Compression Manager (ACM).
TOTAL BUFFER SIZE
The Total buffer size option, found in the Wave page of the Preferences folder
(Options menu), specifies the total amount of RAM that should be used for
buffering when recording to or playing from the hard drive. For most systems,
512 kb is the recommended size. If you are still experiencing gaps during
playback you may want to use more buffering or record at a lower sample rate.
APPENDIX A
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