8
Auto Fast
The attack parameter is a crucial factor for the operation of a
compressor. Choosing the right time setting is very important,
but depending on the dynamic progress of the source material
this is a difficult task – no matter if single tracks or complete mixes are
processed.
If a very short attack time is chosen, the compressor is able to catch the
short peaks, but on the other hand the sustaining signal will also be pro-
cessed, which might result in audible distortion. Longer settings reduce
distortion significantly, but then the compressor is too slow for catching
fast impulses.
This is where the Auto Fast function comes into play. If you set a longer
attack and engage the Auto Fast mode, the attack time will be shortened
automatically on fast and loud signal impulses. The compressor reduces
the signal quickly and prevents it from slipping through.
Then the attack time directly and automatically returns to its original
setting. In Auto Fast mode the compressor can be very fast, but only
when it is really needed.
Attack phase without Auto Fast
Attack phase with Auto Fast
Output Level (dB)
Time (s)
Time (s)
Output Level (dB)
