Teac NT-505 Manual Del Usuario página 22

Settings (continued)
Upconversion
Use to activate the upconversion circuit when receiving PCM signals.
o See page 13 for the relationships between input sampling fre-
quencies and sampling frequencies after upconversion.
o During MQA playback, 4× Fs upconversion will be used regard-
less of the setting.
MENU
UPCONVERT
OFF
OFF
The original input signal is sent directly to the D/A converter
without upconversion.
2× Fs
If the input audio signal is less than 2× a standard sampling fre-
quency, it is upconverted 2× and then sent to the D/A converter.
4× Fs
If the input audio signal is less than 4× a standard sampling fre-
quency, it is upconverted 4× and then sent to the D/A converter.
8× Fs
If the input audio signal is less than 8× a standard sampling fre-
quency, it is upconverted 8× and then sent to the D/A converter.
DSD 256
DSD 512
The input source is converted to DSD digital format, and then sent
to the D/A converter.
22
PCM digital filter
This sets the type of digital filter used when converting PCM signals
from digital to analog.
MENU
DIGITAL FILTER(PCM)
OFF
Sharp roll off
An FIR filter with a steep roll-off is used to sharply cut signals out-
side the audio band.
Slow roll off
An FIR filter with a slow roll-off is used to gently cut signals out-
side the audio band.
Short Delay Sharp
A short delay filter with a steep roll-off is used to sharply cut sig-
nals outside the audio band.
Short Delay Slow
A short delay filter with a slow roll-off is used to gently cut signals
outside the audio band.
Low dispersion
A short delay filter with low dispersion that improves lag charac-
teristics in high frequencies is used.
OFF
No digital filter is used.
o When receiving signals at 352.8 kHz, 384 kHz, 705.6 kHz or 768 kHz,
the digital filter will be disabled during playback regardless of this
setting.
o During MQA playback, the PCM digital filter setting is disabled
and Short Delay Slow is used.
Note about the digital filter during PCM playback
FIR-type digital filters
This type of filter has an established reputation for sound quality
and features tonal quality with both dense, rich sound reverbera-
tions and crisp sound transients.
Short Delay-type digital filters
This type of filter has no pre-echo in the impulse response and
features natural sound attack and reverberation for a tonal qual-
ity that is close to the original.