TerraTec Aureon 7.1 Universe Manual page 54

9. Application Notes
The Descratcher and the Denoiser are user-friendly audio-restoration tools based on an
extremely effective signal-processing algorithm. In most cases, they automatically produce
good results. To get the most out of these tools, especially when working with badly damaged
audio material, use the following, practical guidelines:
·
Create your recordings using the WAV file format and do not use any editing devices, such
as limiters or compressors, before applying the Descratching filter.
·
If the audio material you are restoring contains loud crackling noises, you can limit them
during the digital recording process. We recommend recording various versions with
different input amplification levels and comparing the results after carrying out the
Descratching process.
·
To avoid digital distortion, do not set the Declick and Decrackle parameters too high.
When working with badly damaged material, we recommend finding a good acoustic
compromise between the remaining level of noise and the digital distortions that result
within the signal. Make allowances when trying to improve hopelessly damaged audio
sources, because not even the best tools can bring back the original sound where none is
left.
·
If the sound level and/or sound characteristic changes several times within a recording,
you may want to split the original into separate segments, edit these individually using
various Denoising settings and then normalize them.
·
To avoid digital distortions such as whistling sounds and robot-like noises (time aliasing),
do not set the threshold and reduction parameters too high. Start by using a moderate
setting by adjusting the noise print to just above the background-noise level (about 10
dB), and then increase the reduction parameter gradually. Finally, try determine the
optimal correlation between these two parameters.
·
The Analyzer can be a great help when optimizing the setting of the Denoiser parameter.
During the Denoising process, it makes visible the influence that the noise print and the
parameter setting have on the audio signal.
·
If you find the output signal too quiet, increase the volume while watching the left and
right sound-level bars. If the red range lights up at all, the volume is set too high and you
have reached the so-called threshold range, which can lead to audible distortions.
·
Use the bass and treble sliders to increase (+) or decrease (-) the values of the bass and
treble frequencies to achieve the tone that sounds best. Be aware, however, that setting
the bass and treble levels too high increases the output signal volume level and in some
cases can put it into the threshold range. In this case, lower the volume slider until the
level no longer reaches the threshold range (so that the red LEDs at the top of the level
bars no longer light up).
54 SoundSystem Aureon 7.1 Universe (English)