Digital Algorithms

In the Wadia 581se/781i CD Player 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 581se/781i CD Player all upsample to 32x the input rate (at 24 bit/1.4112 MHz DAC sample rate), but differ in their time and frequency domain characteristics. They are:

Algorithm A Digimaster v2.5. 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 transport or any of the four digital inputs. For 88.2 kHz, 96 kHz and DSD (SACD) sources, Digimaster v2.5 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 musical pleasure.

Selecting an Algorithm

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 581se/781i CD Player will mute for 5-10 seconds while the selected algorithm is downloaded to the two

DSP computers.

Performing an Algorithm Comparison

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 comparison.

In the 581se/781i CD Player, algorithm A is approximately 1db higher output level than B and C (which are within

0.1db of each other). To compensate for this higher output level, increase the indicated volume setting by 2 units for algorithms B and C when comparing them to A.

581SE, 781I specifications

Wadia Digital is a renowned name in high-resolution audio playback, and two of its standout products, the Wadia 581SE and 781i, exemplify this legacy. Both models are revered for their exceptional sound quality and state-of-the-art technology, making them sought-after components for audiophiles.

The Wadia 581SE is a sophisticated CD player known for its remarkable audio fidelity. It boasts an advanced digital-to-analog converter (DAC) that utilizes a proprietary 24-bit design, which plays a crucial role in delivering accurate and detailed sound reproduction. The device also supports various digital formats and high-resolution audio playback, ensuring versatility in audio sources. Its unique rack-mountable design reflects both functionality and aesthetics, seamlessly integrating into any audio system.

On the other hand, the Wadia 781i expands upon the features of the 581SE by incorporating additional functionalities, including built-in streaming capabilities. This model is equipped with Wi-Fi and Ethernet ports, allowing users to access a plethora of music streaming services and digital audio files directly. Like its counterpart, the 781i utilizes high-end DAC technology, ensuring that every note is rendered with precision, clarity, and depth.

Both models boast Wadia's patented Digimaster technology, which upscales the digital signal, enhancing playback quality and enabling a more immersive listening experience. This technology also reduces jitter, ensuring that the music is reproduced faithfully and without distortion.

The build quality of both players is exceptional, with robust chassis designs that effectively minimize vibrations and interference. The elegant displays and intuitive interfaces enhance the user experience, allowing for seamless navigation through tracks and settings.

Another critical feature of the Wadia 581SE and 781i is their support for high-resolution audio formats. This capability allows users to enjoy music at resolutions that surpass traditional CD quality, making them ideal for those with extensive high-definition music libraries.

In summary, the Wadia Digital 581SE and 781i represent the pinnacle of high-end audio technology, combining strong build quality, advanced digital processing, and versatile playback options. These models cater to the discerning audiophile, delivering an unparalleled listening experience through a blend of innovation and artistry in sound engineering. Whether through CD playback or streaming high-resolution files, both devices ensure that every listening session is unforgettable.