In the Preferences dialog box, click the System tab to configure how Adobe Audition interacts with your system:

Cache Size

Determines the amount of memory that Adobe Audition reserves for processing data. Recommended cache sizes range from 8 to 32 MB (32 MB is the default).

Undo

Specifies behavior for the Edit > Undo command.

Enable Undo

Activates the undo function. Because undo requires extra disk space for temporary files and extra processing time, you may want to turn this feature off.

Levels (minimum)

Specifies the number of recent actions to keep when you purge undo. Lower this number to free up more memory but lose more actions.

Purge Undo

Deletes undo actions older than the minimum specified by the Levels setting, freeing up disk space but preventing you from reverting to previous edits.

Temporary Folders

Lets you change the location of folders for temporary files, which Adobe Audition creates when you edit audio. (See About temporary files.) All temporary files begin with AUD and have a .tmp extension. Adobe Audition normally deletes temporary files when it exits. For the options below, click the Browse button  to navigate to a new folder location.

Primary Temp

Specifies the main folder for temporary files. Ideally, it should be on your fastest hard drive.

Secondary Temp

Specifies the secondary folder for temporary files. For best results, specify a different physical hard drive than the primary temp folder.

Note: If you have enough free space for temporary files on the drive that holds the primary temporary folder, you don’t have to designate a secondary temporary folder.

CD Device Options

Specifies the interface Adobe Audition uses to communicate with your CD drive: ASPI (Advanced SCSI Programming Interface) or SPTI (SCSI Pass Through Interface). Most CD drives support SPTI.

Auto‑Save For Recovery

Backs up files more frequently than needed for basic crash recovery. In Adobe Audition, basic crash recovery is on at all times. This option expands that feature, saving backups more frequently. Because this preference can affect performance, select it only if you experience frequent power failures or system crashes.

Delete Clipboard Files On Exit

Deletes Adobe Audition clipboard files when you exit. In general, leave this option selected. Usually, after you finish with an Adobe Audition session, these clipboard files are no longer needed and just take up space.

Force Complete Flush Before Saving

Disables the quick save feature, which lets Adobe Audition quickly save files that contain only minor modifications. If you select this option, Adobe Audition saves an internal backup copy of entire files, considerably increasing the save time for large files. Select this option only if you have trouble saving back to the same filename or you have a problem with the Adobe Audition quick save feature.

Replace Invalid Filename Characters With This Character

Replaces invalid filename characters in imported CD tracks. To delete invalid characters without replacing them, leave this box blank.

Default File Filter When Opening WAV Files

Determines the variant of the WAV format used to open *.wav files. In most cases, Windows PCM is the best choice, as the vast majority of WAV files are stored in this format. Specify a different option only if you commonly open WAV files in a more unusual format.

Default Format For Open Dialogs

Determines the default format for opening files. If you typically open files in one format, this option helps you narrow the displayed list of files. You can override the default format in the Open dialog box.

Default Format For Save As Dialogs

Determines the default file format for saving files. If you typically save files in one format, this option makes the saving process more efficient. You can override the default format in the Save As dialog box.