As explained above, Audio Units are plug-ins developed by third parties that allow to extend Amadeus Pro’s (and any other Audio Units host’s) abilities. The Audio Units Rack allows to apply several Audio Units in one go. Simply drag the desired effects from the Available Audio Units section to the Applied Audio Units section of the rack window. In order to change the settings of an effect, either double-click on it or select it and click on the button with the little pen. You can remove an effect from the list of applied Audio Units by selecting it and hitting the [backspace] key or clicking on the button with the minus sign.
The following list of effects ship with Mac OS X 10.4. Unfortunately, Apple doesn’t ship any documentation whatsoever for their settings so your bet is as good as anyone’s. For some of the more esoteric settings, experimenting is probably the best option.
Suppresses all frequencies outside of a specified band.
Same as the Echo effect. It includes a dry/wet mix setting that allows to choose the proportion between the original sound and the echo. At 0%, it makes no modification to the sound, at 100% it keeps only the echo and removes the original sound. The default value of 50% corresponds to the behaviour of Amadeus Pro’s Echo effect.
This allows to expand or compress the dynamical range of a sound. The dynamical range is the ratio in volume between the quiet parts and the loud parts. Compressing the dynamical range results in the volume becoming more uniform throughout the sound. When normalized afterwards, the quieter parts will therefore sound louder. This effect is often used (and abused) by record labels in order to make a CD sound louder. The different presets shipping with this effect give good results.
This is basically a combination of an AUHipass and an AULowpass filter, as well as three parametric equalizers.
Standard 10 or 30-band graphical equalizer.
Reduces drastically frequencies below a cut-off frequency. The gain setting allows to adjust the strength of this reduction.
The opposite of AUHighShelfFilter, it reduces drastically frequencies above a cut-off frequency. The gain setting allows again to adjust the strength of this reduction. Useful to remove a low rumble in a recording.
Pretty much the same as AULowShelfFilter.
Pretty much the same as AUHighShelfFilter.
Very sophisticated reverb effect. It takes stereo effects into account to create the impression of a large enclosed space and can therefore not be applied on mono tracks. You will probably want at least to lower the dry/wet mix to 50% from its default value of 100%.
A compressor (like the AUDynamicsProcessor effect) that however
first divides the sound into four separate frequency bands, determined
by the crossover frequencies
. It then allows to have different
settings for each of the four frequency bands.
Allows to send the sound over a network. It doesn’t perform any processing and is therefore only useful in Preview mode.
Allows to boost or decrease the volume in a frequency band
centred around the center frequency
. The Q
value
determines the width of the frequency band.
Amplifies the sound by pre-gain
, but makes sure that it
does not get clipped. Works essentially like a compressor.
Allows to change the pitch of a sound without changing its speed. The change in pitch is given in ‘cents’. There are 100 cents in a semitone and therefore 1200 cents in one octave. The remaining parameters allow to fine-tune the effect.
Simply shifts the sound forward by the specified number of samples. Probably useless in Amadeus Pro’s context of off-line processing.
