API Audio 527A handleiding
Handleiding
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527A Compressor/Limiter API
8
6.0
THRUST
®
The 527A compressor includes API’s patented
THRUST
®
circuit that can be switched in or out as needed.
This places the
THRUST
®
filter before the RMS detector that decreases the compressor’s reaction to low
frequency content. The result is a noticeable increase of punch and low frequencies, but a uniformly
compressed signal. It’s the “little more punch” switch!
The patented
THRUST
®
circuit has been used for many years in the famed API 2500 Stereo Compressor,
the new 2500+, ATI Paragon and Paragon II consoles, as well as the Pro6 Input Strip. This circuit
places a filter in front of the RMS detector with a slope of 10dB per decade (-3dB/8va), which is the
inverse of the pink noise energy curve. In acoustics, the pink noise curve is used to equalize energy
vs. frequency over the audio spectrum, as sound requires more low frequency energy than high
frequency energy to sound correct to your ear. In Hi-fi equipment, a “LOUDNESS” contour is used to
equalize the music at lower levels so it sounds correct. Even with this curve, there is still a substantial
amount of low frequency information compared to high frequency information in the audio signal path.
When that signal is fed into the RMS detector, the detector will process the signal into a DC control
voltage based upon those louder low frequencies, resulting in a control voltage that favors the low
frequencies of the signal, causing pumping and a loss of punch. Sometimes, this is not desirable. By
engaging the
THRUST
®
switch, this inverse filter is placed in front of the RMS detector, evening out the
energy by lowering the energy in the low frequencies and increasing the energy in the high
frequencies, so each octave has the same energy instead of each octave having half the energy as the
one lower. This creates a unique compression effect that still reduces the overall gain, but the sound is
much more punchy and the signal actually sounds less compressed.
With
THRUST
®
engaged (IN) gradual, linear filter, down 15dB at 20Hz and up 15dB at 20kHz is applied
to the signal feeding the RMS detector, equalizing the energy going into the RMS detector. This
decreases the way the higher frequencies are compressed. The overall difference is a noticeable
increase of punch and low frequencies, but a uniformly compressed signal. It is the “little more punch”
function.
The
THRUST
®
circuit can be engaged using the
THRUST
®
switch.
THRUST
®
: Set to engage the
THRUST
®
function
• IN: Inserts the
THRUST
®
filter before the RMS detector
• Out: No filter before the RMS detector
Bekijk gratis de handleiding van API Audio 527A, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | API Audio |
| Model | 527A |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 2708 MB |
