Wadia Digital 861 - Manual (Page 17)

In the Wadia 861 there are three user-selectable digital algorithms that can
be used to optimize the sonic performance based on system matching and
personal musical priorities.
The three algorithms in the 861 all upsample to 32x the CD input rate
(1.4112 MHz DAC sample rate), but differ in their time and frequency
domain characteristics. They are:
Algorithm A Digimaster v2.4. Wadia’s classic time-domain interpolation
algorithm delivers a robust sound with extraordinary image
focus and re-creation of recorded space.
Algorithm B Provides a more extended top end than Algorithm A,
with superior time-domain performance compared to
conventional CD filters.
Algorithm C Retains the high frequency extension and superior
detail resolution of Algorithm B, but with a more relaxed
presentation overall.
The selected algorithm is used for 44.1 kHz (CD) and 48 kHz sources,
either from the internal CD transport or any of the four digital inputs. For
88.2 kHz and 96 kHz sources, Digimaster v2.4 is always used as it provides
the best performance at high-sample rates.
We encourage you to become familiar with the unique sonic performance of
each of these algorithms and enjoy the one that brings you optimum musi-
cal pleasure.
To change the digital processing algorithm, press the Enter button on the
remote control repeatedly to bring up this configuration screen:
The selected algorithm is shown on the second line of the display. Use the
Up and Down Volume buttons to scroll to the desired algorithm, then either
press the Mute button or the Enter button to navigate to the ‘Save Changes?’
screen and choose ‘Yes’. The display will indicate ‘CONFIGURATION
STORED’ and the output of the 861 will mute for 5-10 seconds while the
selected algorithm is downloaded to the two DSP computers.
When comparing processing algorithms it is important to adjust the volume to
compensate for the different gains of the algorithms. Without this adjustment
the one which is louder will usually sound better in a short-term A/B compari-
son.
In the 861, algorithm A has approximately 1 db higher output level than B and
C (which are within 0.1 db of each other). To compensate for this higher
level, increase the indicated volume setting by 2 units for algorithms B and C
when comparing them with A.
Wadia 861 COMPACT DISC PLAYER
ADDENDUM 1
DIGITAL
ALGORITHMS
SELECTING AN
ALGORITHM
PERFORMING
ALGORITHM
COMPARISONS
S E L E C T A L G O R I T H M
A l g o r i t h m A