5. APPLICATION NOTES
Headroom 9 dB
2.0 : 1
1.6 : 1
1.3 : 1
1.1. : 1
off
static characteristics: compressor
compression gain: max. 10 dB
parameter: ratio
digital reference level: -9 dBFS
-50
-40
-30
-20
-10
0
-50
-40
-30
-20
-10
0
input level (dBFS)
output level d02 (dBFS)
The audio signal delay through the dynamics processor is
approx. 2ms due to delaying of the audio signal using internal
memory. A small delay is deliberately introduced to the audio
signal in order to allow limiter and compressor algorithms which
can 'preview' the audio signal before changing it. That is the
signal curve can be changed before maximum level is reached.
(For further details see chapter 1).
This delay must be considered before attempting to mix
signals processed by the dynamics processor with other
undelayed signals.
When mixing together a delayed signal and a direct signal
there may be cancellation of the signal waveform at some
frequencies and re-inforcement of the waveform at other
frequencies (comb filter effect). Corresponding 2ms delay of
direct signals should therefore be carried out before mixing
them with delayed processed signals.
fig. 5:
Static
characteristics:
Compressor/
Limiter with -9dBFS
Digital Reference
Level
5.4.
Influence of signal
delay time
25
