581 Disc Player

Inverting Absolute Phase

The Wadia 581 Disc Player has the ability to invert absolute phase in the digital domain. Pressing the Phase Invert button on the remote control will cause the Wadia 581 to invert phase; pressing it again will switch the phase back to normal. If the Wadia 581 Disc Player is in Phase Invert mode, this will be indicated on the Input Screen of the display.

Turning Display On/Off

By pressing the Display On or Off button, the Wadia 581 Disc Player display can be turned off completely.

Mute Modes

The Wadia 581 Disc Player has two mute modes that are automatically implemented under different circumstances.

DSP-Software Mute

When the Mute button is pressed on the remote control, the Wadia 581 Disc Player’s DSP engine transmits a stream of zero signal level samples to the DAC section, which results in zero output.

Output-Relay Mute

The Wadia 581 Disc Player has mute relay connected between the positive and negative outputs. When this relay is engaged, it connects the positive output to the negative output, reducing the output to zero. This relay, which produces an audible click when it engages or disengages, is not in the music signal path. The mute relay is engaged:

•When the Wadia 581 Disc Player detects AC input level below its minimum operating range.

•Each time the Wadia 581 Disc Player power switch is turned on.

•When the volume control is set to zero AND the mute button on the remote control is pressed. When the Wadia 581 Disc Player is in either Mute Mode, the Volume Screen will indicate this by Displaying the word, “MUTE.”

TRACK FORWARD/REV: Pressing these buttons allows access to the previous or next track on a disc.

SEARCH/FORWARD/REV: Pressing these buttons allows fast reverse or fast forward access through a track. Pressing the PLAY button to resumes normal playback.

STOP: Pressing this button while a disc is playing stops PLAY.

PAUSE: Pressing this button, while a disc is playing, suspends PLAY. Pressing the PLAY button or the PAUSE button will resume play at the point where the pause button was pressed.

PLAY: After a disc has been loaded into the drawer, pressing this button plays the disc beginning with the first track on the disc or in a sequenced program. Pressing this button while the drawer is open closes the drawer and begins play with the first track on the disc or in a sequenced program.

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Theory of Operation

Using ClockLink with an External Processor

ClockLink eliminates jitter added when the clock signal is recovered from the digital data stream. In a non-ClockLink system, jitter is added when the clock signal is embedded in the data stream and transmitted to the DAC. When the clock signal is recovered from the data stream (as shown below), and used to clock the DAC output, this jitter degrades the sonic performance.

Data and Clock to DAC

Transport

DAC

Jitter Added

Conventional CD Player

With ClockLink, the clock is not recovered from the data. Instead, the master clock is located at the DAC. This clock signal is transmitted to the transport to keep it synchronized with the DAC. Because the recovered clock is ignored, any jitter on that signal does not affect the sonic performance.

 

Data to DAC

Transport

DAC

Clock to Transport

CD Player with ClockLink

The Wadia 581 Disc Player with its digital inputs and outputs can be used with a digital signal processor such as a digital equalizer. Digital processors allow the signal to be modified without adding analog noise and distortion. However, digital processors can add jitter, as shown below, causing noticeable sonic degradation.

Data and Clock to DAC

 

 

Digital

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Digital

 

Processor

 

Digital

Output

 

 

 

Jitter Added

 

 

 

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transport

 

 

 

 

DAC

 

 

 

 

 

 

 

 

 

 

 

Conventional CD Player with an External Digital Processor

Using ClockLink with an external processor, the Wadia 581 Disc Player ignores the incoming clock and uses the master oscillator at the DAC. As a result, jitter added by the external digital processor does not affect sonic performance.

 

Digital

 

Data to DAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Digital

Processor

 

 

 

 

 

 

Digital

Output

 

 

 

 

 

 

 

 

 

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transport

 

 

 

 

 

 

 

DAC

 

 

 

Clock to Transport

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CD Player with ClockLink with an External Digital Processor

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Wadia Digital 581 operation manual DSP-Software Mute, Theory of Operation
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581 specifications

Wadia Digital's 581 is a high-performance CD player and digital-to-analog converter (DAC) that has earned a significant reputation among audiophiles and music connoisseurs alike. Launched into the high-end audio market, the 581 is known for its innovative technology and exquisite sound quality that brings listeners closer to the original recording.

One of the most striking features of the Wadia 581 is its proprietary DigiMaster technology. This technology ensures accurate digital signal processing, allowing for exceptional sound reproduction with minimal distortion. DigiMaster is designed to provide a precise and natural sound stage, retaining the dynamics of the original recording while minimizing any coloration that might alter the listening experience.

The 581 employs an advanced digital filter system, which offers users the ability to customize their listening experience. This flexibility allows listeners to select among several digital filtering options, ensuring that they can tailor the sound to their preferences. Coupled with a high-quality DAC, the Wadia 581 is capable of decoding a wide range of digital audio formats, providing users with versatility and ease of use.

Wadia's signature construction methods also shine through in the 581. The player is built with an all-aluminum chassis that minimizes external vibration and interference, contributing to a cleaner, more accurate sound. The internal components of the 581 are carefully selected, featuring high-quality capacitors and precision engineering that work together to create a robust and reliable playback system.

In terms of connectivity, the Wadia 581 offers multiple digital inputs, including coaxial, optical, and USB, accommodating various modern digital sources. This flexibility enables users to integrate the player into a wide array of audio setups, making it not just a standalone CD player but a versatile digital hub.

The 581 also features a high-resolution LCD display, which provides essential playback information and allows users to navigate tracks effortlessly. The user interface is intuitive and designed for ease of operation, making it accessible for both seasoned audiophiles and casual users.

In summary, the Wadia Digital 581 stands out in the realm of high-end audio equipment due to its blend of advanced technologies, customizable features, and elegant design. It is a strong choice for those seeking an exceptional listening experience that reflects the true essence of the music.
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