Wadia Digital 381I operation manual Digital Algorithms

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Digital Algorithms

In the Wadia 381/381i 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 381/381i 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 and 96 kHz 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 381/381i 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 381/381i 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.

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Contents Information&OperationManual 381/381i CD Player Safety Precautions Table of Contents PreliminariesInstallation and Set-up General OperationThank You Wadia Digital a Brief HistoryRemote Control Two type AAA batteries Installation and Set-up UnpackingAccessories Installing the Tip-ToesConnecting Directly to a Power Amplifier Connecting to Your SystemConnecting to AC Power Using with a PreamplifierOptimizing the Output Level Choosing a Digital Cable Wadia 381i CD Player onlyFrequently Asked Questions Should I use a Balanced or Unbalanced connection?Front Panel Controls ExampleDisplay Features Display Functions381/381i CD Player Remote Control Operation InputPhase Invert Output Relay MutePlayback Options Using ClockLink with an External Processor Theory of OperationClockLink Status Indication Menu Screen Map Digital Algorithms Software License Agreement Appendices TroubleShooting Lock-upUsing Data Discs Environmental CareTechnical Specifications Safety Precautions Important Safety Precautions

381I, 381 specifications

Wadia Digital has long been synonymous with high-fidelity audio reproduction, and their models 381 and 381i epitomize this legacy. The Wadia 381 and 381i are both premium digital-to-analog converters (DACs) and serve as transport devices that reflect the brand's commitment to superior sound quality and build excellence.

One standout feature of the Wadia 381 is its sophisticated digital signal processing technology. This model utilizes advanced algorithms to provide exceptional audio performance, delivering a sound that is both accurate and engaging. The 381 is equipped with a proprietary Wadia digital filtering system that helps to minimize distortion while maximizing dynamic range. This results in a listening experience that captures the nuances and subtleties of the original recording, preserving the integrity of the audio.

Both models feature high-resolution audio capabilities, accommodating a wide range of digital formats. The Wadia 381 supports PCM rates up to 192kHz/24-bit, ensuring compatibility with high-definition recordings. The 381i takes this a step further by incorporating DSD (Direct Stream Digital) playback, which is becoming increasingly popular in the audiophile community. This versatility allows users to enjoy an extensive library of music with unyielding fidelity.

The construction of the Wadia 381 and 381i reflects the brand's high standards in engineering. Both models boast a solid aluminum chassis that not only contributes to their striking aesthetics but also helps isolate the internal components from external vibrations, enhancing overall performance. The front panel features an intuitive user interface, making navigation and selection a breeze, even for those new to high-end audio equipment.

Connectivity options are another key aspect of the Wadia 381 and 381i. They come equipped with a range of inputs, including USB, Coaxial, and Optical, providing users with flexible connectivity to computers, network players, and other digital sources. Balanced and unbalanced outputs ensure compatibility with various audio systems, allowing for seamless integration into any setup.

In conclusion, the Wadia Digital 381 and 381i are remarkable examples of high-end audio engineering. With their innovative technologies, exceptional build quality, and user-friendly design, they cater to audiophiles seeking an uncompromised listening experience. Whether you are a seasoned listener or just beginning your high-fidelity journey, Wadia's offerings promise to deliver sound that is rich, detailed, and profoundly immersive.
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