TC Electronic MD4 HD handleiding
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15 MD4 HD NATIVE User Manual
6. Dynamics Processing In-Depth
After the Normalizer Gain, the signal is gently split into 5 overlapping bands - the
low, low-mid, mid, high-mid, and high frequencies. It will then compress each
band somewhat independently. Thereby, for example, a powerful kick-drum will
not modulate the processing of the lead vocals. After compression, the 5 bands
are combined again.
6.1 Compressor
The very basis of compression can be reduced to "controlling the dynamic
content" of an audio signal. This basically means turning down the loudest parts
of the source material and raising the volume of the parts with low level content.
But how this is done, and how this is applied in audio production, is slightly more
elaborate.
Keep an eye on the illustration below and let us look at the basic compression
parameters:
Threshold
The Threshold parameter sets the limit where the compressor kicks-in/
releases its grip of the signal. As soon as the level is above the set threshold the
compressor is active. When below - it is not.
Ratio
The Ratio sets the amount of gain reduction applied when the signal exceeds the
threshold. In the illustration above, the Ratio is the steepness of the curve after
the compressor threshold.
Attack
The Attack time is the time it takes for the compressor to reach the compression
amount specied by the set ratio.
Release
The Release time is the time it takes for the compressor to release the signal
after the input signal is below the threshold point again. How each of these
parameters are set is very important, and only the correct combination gives the
desired result.
Examples of Compressor Threshold and Ratio
Let us look into setting the Threshold and Ratio. In many cases, you would use a
low threshold, in combination with a small ratio and vice-versa. Let us choose a
low threshold of -23 dB and a small compression ratio of 2.5:1.
We have now set the compressor – but with identical settings for all 5 bands.
With identical settings, we are not taking full advantage of the multiband
capabilities. This is where the individual band controls come in. For example,
click on the Thresh control knob once, or the Thresh button in the row below the
controls, and the Focus Fields change to show the Threshold settings for each
band. To return to the Assigned Focus Fields, select Thresh again.
The controls allow you to create dierent settings for each of the 5 bands and All.
Examples of Attack, Release and Crossover Frequencies
Let us look into how to set the Attack and Release Times.
We start with small values for both parameters. If the attack time is too short,
we may remove some nice transients or “kick” from the material. This may not
be what we want, so we could try a greater value instead. Heavy peaks can be
smoothed using the limiter section.
If the release-time is too fast, it may result in a “pumping” eect, because the
compressor returns to the uncompressed signal immediately whenever the signal
falls below the compressor’s threshold setting. If so, we could increase the value
of the release time until we are satised with the result.
You could start with an Attack time of 1 ms and a Release time of 200 ms.
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Productinformatie
| Merk | TC Electronic |
| Model | MD4 HD |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 8045 MB |
