PreSonus CL44 - Manual (Page 11)

3.1 BASIC APPLICATIONS
Example Setup Compressing a Voice or Vocal Track
Probably the most common use of a compressor is to limit the dynamic range of a vocalist during a live performance or a
recording. It is almost always necessary to compress a vocal take during a recording session. Most vocalists have a very
wide dynamic range, and if the vocalist does not have 'studio' experience, the dynamic range of the vocal performance can
be enhanced by the microphone techniques demonstrated during a session.
This wide variation in level makes it difficult to properly record a vocal take, especially in digital multi-track recorders which
have definite limitations in headroom.
Compressing a vocal also makes it easier to place the vocal track in a mix so that it remains 'in your face' throughout the
track.
To set up for a vocal take, insert a channel of your CL44 into the same channel as the microphone on your mixer. If your
mixer has an insert point, insert the compressor there. If you don't have an insert point you will have to place the
compressor after your mixer's bus-output or whichever output you're using by coming out of your mixer to the input of the
CL44; then out of the CL44 to the input of your recorder. If you're using a stand alone mic preamp; patch the CL44 after
the preamp and then to the recorder.
To set the compressor: turn the ratio to the 2:1 mark on the legend. With the vocalist yodeling into the mic, turn the
compressor's threshold until the gain reduction meters read about -7dB. Now you will probably need to boost the
compressors' output by turning the Gain knob clockwise so that your mixer or multi-tracks meters read 0dB (in the case of
some digital recorders this is -14dB).
This would be a basic, very simple but useable setting for recording a vocal. Things to vary to suit your taste might be:
adjusting the ratio and threshold for more/less dynamic range. Push the Optical button in and check out the Optical
compression curve. Take the compressor out of Auto mode and adjust the Attack and Release times to taste.
Patching Using a Patch Bay
When using a patch bay to extend the CL44's patch panel for easier access, the following should be considered:
1. Lowest noise is achieved when using balanced patch bays.
2. The input and output jacks should not be normalled (the send routed
back to the return).
3. The sidechain jacks must be normalled.
Compressing and Limiting Drums or Percussion Instruments
Limiting the dynamic range of a drum kit may or may not be something you want to do to your drum tracks, but there are
some other cool things the CL44 can do to make your drums sound really happening. If you think about how a snare drum
sounds, it has a beginning loud sound followed by a usually short decay. Patch a channel of your CL44 for compressing the
snare drum as described above and we can explore some dramatic changes that good compression has on the snare.
For a simple setup, make sure that the: Optical button is out, Auto button is out, Ratio is set to 4:1 on the legend, Attack is
fully counterclockwise, Release is straight up at 12:00 o'clock, Link button is out and Bypass button is out. Adjust the
threshold until you see about -1 dB on the gain reduction meters. At this point, the snare's volume is simply lowered by 1
dB. Now slowly raise the Attack time by turning the attack knob clockwise. You should notice that the beginning 'transient'