The Enhancement Menu

Interpolate

The Interpolate command subsitutes the selected section (if sufficiently small) with a linearly predicted wave form. This command is useful when removing clicks and pops from recording manually.

Click Filter

The click filter removes clicks and pops as found on LP and 78 RMP- recordings. See Noise Reduction in Acoustica for more information.

Noise Analysis

If a section of the recording contains noise only, you can generate a noise profile automatically using this menu command.

Noise Reduction

Noise reduction can be performed either by using the results from the noise analysis or by drawing your own noise profile by selecting the corresponding from the submenu.

Remove DC Offset

Uncalibrated recording equipment may result in a signal that is not centered around zero as should be. This command applies a high pass filter with a subsonic cutoff frequency to eliminate this problem.

High frequency rebirth

Dull and lifeless recordings may be a result of loss of high frequency content. By using the High frequency rebirth feature, you can add artificially created harmonics to liven up the recording. Note that these are merely synthetic harmonics based on the lowfrequent content of the recording, so this feature can only be used give our ears the impression of stronger harmonics. Lost high hats or similar will most likely not be reconstructed using the feature.

Settings

Equalizer

Acoustica features a powerful six band parametric equalizer. Unlike a graphic equalizer, a parametric equalizer allows the user to select the center frequency of the bands. The equalizer in Acoustica also has variable bandwidths on each band.

The center frequency is specified in hertz. Sound characters of the different frequencies are best discovered through experimentation. The bandwidth may be specified in octave bands. One octave band equals the frequency range of one octave on the piano keyboard. The bandwidth is the same parameter as the Q-factor found in some analog equipment. A higher Q-factor represents a narrower bandwidth.

The lower part of the equalizer dialog box is used to display the filter response curve (gain vs. frequency). The filter response curve is calculated mathematically and is updated as the parameters are altered.

Equalizer parameters may be stored for later use. This is done by pressing the Save... button. A file dialog box will be displayed. When a file name is specified and saved, reload the setting by pressing the Load... button and specify the correct file name. The default settings of the equalizer may be set by pressing the Reset button.

Band Settings


Global Settings