59
AAC/SBR
Output LPF
MP3
Output LPF
WMA
Output LPF
24kbps
8kHz
24kbps
6kHz
24kbps
5kHz
-
6kHz
32kbps
10kHz
32kbps
6kHz
32kbps
8kHz
48kbps
13kHz
–
16kHz
48kbps
8kHz
–
10kHz
48kbps
10kHz
–
13kHz
64kbps
16kHz
64kbps
10kHz
–
16kHz
64kbps
13kHz
–
16kHz
!!!--- IMPORTANT NOTE ---!!!
Always set the low pass filter frequency so that it is at or below half the sampling frequency of the encoder.
This must be done in order to comply with the Nyquist Theorem
1
. Doing so will achieve the highest perceived
audio quality.
1
The Nyquist Theorem states that the maximum frequency that may be applied to a sampled data system is one
half the sampling frequency. When signals beyond half the sampling frequency are present, aliasing occurs
which causes the appearance of an inverted spectral image of the audio spectrum to be “folded around” the
lower side of the sampling frequency (it is actually folded symmetrically around both upper and lower
sidebands of the sample frequency, however in professional audio applications only the lower sideband is
usually audible). When this occurs the original signals and the aliases
are not separable by any means!
<-Exit
Click on this option to return to the
Adjust Processing
submenu.
<-Exit
Click on this option to return to the
Processing
menu.
