Yamaha YSP-40D Manual Do Utilizador

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This channel is for the reproduction of low bass signals. 
The frequency range for this channel is 20 Hz to 120 Hz. 
This channel is counted as 0.1 because it only enforces a 
low-frequency range compared to the full-range 
reproduction by the other 5/6 channels in Dolby Digital or 
DTS 5.1/6.1-channel systems.

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Linear PCM is a signal format under which an analog 
audio signal is digitized, recorded, and transmitted 
without using any compression. This is used as a method 
of recording CDs and DVD audio. The PCM system uses 
a technique for sampling the size of the analog signal per 
very small unit of time. Standing for pulse code 
modulation, the analog signal is encoded as pulses and 
then modulated for recording.

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SRS TruBass is a psychoacoustic bass enhancement 
technology developed by SRS Labs, Inc. for speakers and 
headphone systems that delivers bass up to an octave 
below the physical capabilities of the speaker’s driver. 
SRS TruBass technology takes advantage of a 
spontaneous tendency of the human ears to infer low-
range audio data when presented with higher-frequency 
harmonic signals. As a result, our ears can hear the 
original low-range sound that the speaker system is 
incapable of producing.