In DART XP Pro all major restoration tools can be tuned on-line providing you with an easy way of evaluating the effects of different program settings. To perform on-line tuning check the On-line box in the corresponding dialog and select the processing range (entire file, from cursor, local, block). Then press the Play result button. Working in the on-line mode DART XP Pro will allow you to listen to the renovation results while changing the program settings. Each time you modify any of the settings the green Ready light situated next to the On-line box will go off - it will be switched on again as soon as the results obtained under the new settings are available. If, during the on-line testing, the values of processing parameters are chosen incorrectly (e.g. the lower cutoff frequency of a bandpass/bandstop filter exceeds the higher cutoff frequency) the corresponding items are displayed in red. The inappropriate settings are ignored by the system until they are defined correctly (the last correct settings are used instead).
At any time during the test you can press the Play source button to bypass processing and listen to the original recording. Since the audio card settings, such as the sampling frequency or the number of channels, cannot be changed ‘on-the-fly’, i.e. during the playback, some utilities (e.g. those belonging to the Sample rate group) will not allow you to switch directly between the Play source and Play result buttons when tested in the on-line mode - you have to stop playback before pressing the other button. For the same reason some options in the corresponding dialogs are disabled when the Play result button is pressed.
If your computer is too slow to perform tuning in the on-line mode leave the On-line box unchecked. In cases like this all experiments will be performed off-line on a selected fragment of the recording.
NOTICE
Use the Preferences dialog available from the Options menu to change the ‘on-line tuning’ default if necessary.