Zero One Ti 48 Instruction Manual page 34

Ti48 Instruction Manual v1.2
12.2.3 Dither
Dither should be applied when outputting to a D/A converter which is capable
of accepting more than 16­bit wordlength. Do note that many older DACs
which use greater than 16­bit chips are limited to 16­bit input by the S/PDIF
receiver configuration. Consult your manual for the DAC to see if it can
receive data with wordlength greater than 16­bit.
There are four dither options available :
Dither Comments
None No dither added
Triangular PDF dither added
TPDF
This is a special kind of high­passed dither which introduces ultrasonic
Nshape
noise right at the Nyquist limit of the sampling rate in use. This can help
to linearise some D/A converters.
Second order noise shaping is employed to allow more resolution at the
Nyquist
low frequencies, as the expense of more noise at the higher ones. A
useful choice for the sampling rates of 88.2K onwards
12.2.4 Wordlength
The wordlength of the upsampled data can be increased to improve the
accuracy of the data processing. This protects against data being lost during
the mathematical operations required for the interpolation and sample rate
conversion. The wordlength options available are :
16 bit / 18 bits / 20 bits / 24 bits
12.2.5 Phase
Normal / Inverted
12.2.6 Sig Attn
Attenuation : None
This passes the signal through from the input without applying any
attenuation.
Attenuation : 3dB
This attenuates the incoming signal by 3dB at the processing stage, to allow
headroom for upsampling. It can also improve the linearity of D/As when
playing very compressed/loud recordings which regularly come close to or hit
0dBFS.
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