Reference Class Manual

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e. Upsampling at 96kHz – this mode engages the Upsampler with a sampling frequency of 96kHz, performing
quite a large degree of digital manipulation. The original data from the CD is in effect discarded and re-placed with
a re-calculated version. This new version of the music is non-linearly scaled up using a complex number as scaling
factor and resolution/edge enhanced. The sonic result of upsampling is similar to oversampling; however there are
subtle degrees of change in the tonality due to a shift in the harmonic spectrum as a result of the complex number
which underlies the scaling.
f. Upsampling at 192kHz – this mode engages the Upsampler with a sampling frequency of 192kHz, performing
a very large degree of digital manipulation. The original data from the CD is in effect discarded and re-placed with
a re-calculated version. This new version of the music is non-linearly scaled-up using a complex number as scaling
factor and resolution/edge enhanced. The sonic result of 192kHz upsampling is similar to 96kHz upsampling. How-
ever, as the complex numbers that underlie the upsamplings are different to oversampling, the shift in the harmonic
spectrum is not the same: hence tonality is somewhat different.
3.13 Brightness (RC-77 only)
The BRIGHTNESS button (RC11) allows for the adjustment of the display on the front panel of the CD-77. There
are 4 different brightness settings including display off. With a separate power supply, the display has no impact
upon the sonic performance.
OptiSample modes c-f
offer more typical
versions of digital
playback