Apple Logic Pro 7 User Manual download pdf (Page 411)

100

101

Chapter 11 Sample Editor 411

Operation

Set the Spike Reduction function to off, so that only the Noise Reduction function is used.

Click the Process button to execute the function.

There is only one parameter for controlling the intensity of the process. Off means no

edit, Min is the smallest possible edit, small numbers have a small effect and Max

produces the maximum possible reduction of the noise component. The “correct” value

depends on the quality of the material, and your own personal taste. Good quality

material should only be edited using Min or 2. You will probably only notice minor

changes in the sound. Bad (noisy) quality material should be processed at higher values

or even Max. If the setting is too high, the treble component of the signal will be

reduced.

The Silencer function is optimized for normalized data. Low level material should be

normalized first.

Spike Reduction

The aim of Spike Reduction is to identify and reduce signals such as pops, clicks, or

digital spikes, in order to reconstruct a hypothetical “original” signal.

Operation

Set the Noise Reduction switch to off, so that only the Spike Reduction function is

active. Click the Process button to execute the function.

The Sensitivity parameter controls the automatic recognition of spikes. When set to

High (sensitivity), relatively small signal spikes are identified. When set to Auto, the

threshold is controlled automatically by the program.

The Method parameter controls the intensity—the way these spikes are processed.

Gentle is the weakest algorithm, and only slightly smooths the original signal, while

Aggressive is the strongest. All of these settings filter the original signal at the identified

points.

By contrast, the re-build setting completely replaces the often unusable original signal

with an artificially generated estimate of the original signal, at the identified points.

This synthesized signal is created by analyzing the audio material surrounding these

points.

Experiment with the parameters. If the Sensitivity is too high, there’s a danger that very

sharp transients in the main signal will be identified as spikes. Depending on the audio

material, it’s sometimes impossible for the program to distinguish between the two.

This is particularly the case if the decision between “spike or main signal” is merely a

matter of taste—with some “click-like” bass drum sounds, for example. The attack phase

of these sounds can have similar characteristics to static on vinyl.

1 2 ... 406 407 408 409 410 411 412 413 414 415 416 ... 729 730

Comments to this Manuals

No comments

Apple Logic Pro 7 User Manual Page 411

Comments to this Manuals

Related products and manuals for Software Apple Logic Pro 7