High Frequency Rebirth

Dull and lifeless recordings may be a result of lost high frequency content. By using the High Frequency Rebirth tool (select Enhancement | High Frequency Rebirth...), you can add artificially created harmonics to brighten up the recording. Note that these are merely synthetic harmonics based on the low frequent content of the recording and this feature can only be used give the listener the impression of stronger harmonics.

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The High Frequency Rebirth settings

Settings

·Generate above  
Specifies the lower limit of the frequency band where harmonics should be synthesized.  
 
·Add content / Replace content  
If add content is selected, the original content in the synthesis frequency band is mixed with the synthesized harmonics. If you choose replace, Acoustica removes the original content before adding the synthesized harmonics.  
 
·Dry level  
The amount of unprocessed signal in the output mix.  
 
·High frequency level  
The amount of processed signal in the output mix.