Model S will be discontinued by the end of this year

The Model S DAC has been initially released 11 years ago. A current version of this reference TDA1541A D/A converter, a Mark3, will be the last one, and it will be gradually discontinued by the end of this year.

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AYA 4, second run

The AYA 4 was a very nice project, and it apparently remained on your radar way after the originally produced quantity was sold out. So we will make it one more time.

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Classic and transformer coupling: System grounding difference

The use of signal coupling transformers requires a somewhat different approach to the system grounding.

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AYA 4: This year’s AYA release, featuring 192/384 kHz async USB

AYA 4 is 2018 AYA release, with all the features of previous AYA II DACs, and completely changed, now no-compromise, 192 or 384 kHz capable asynchronous USB stage. AYA 4 can be used as usual stereo DAC, but its USB input stage can be also made as 4 channel interface.

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Model S4 is coming

Model S4 comes to show how real audiophile reference USB DAC sounds today. It also includes acclaimed and well known Audial S/PDIF quality input.

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USB board Mk3 and AYA II revisited (proposal)

Two projects proposal for 2018.

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Plans for 2018

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Another story about TDA1541A: 384 kHz

Can this old gem get there?

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Back to the roots: 14 bits (of TDA1541A)

By measuring standard low level performance at -60 dBFS (dithered sine wave), there was practically no difference between its regular 16 bit, and this 14 bit “mode” of operation. Noise floor, on the other hand, is somewhat higher, roughly speaking 6-12 dB, and that is what you would expect, given 2 bits difference.

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USB to simultaneous data or I2S converter, series 2

Audial USB interface second release. Now offered as both module and ready made device.

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USB to simultaneous data (or I2S) board

Audial quality USB interface. At one side it connects to PC via USB port, and on the other it outputs “raw” PCM signal, in simultaneous data or I2S form.

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Transformer coupling pros and cons (in a nutshell)

Purely sonically, transformer coupled output has more calm presentation, with more quiet background, and somewhat more precise soundstage. On the other hand, transformers can lack some definition at the most bottom end. Still, possible benefits and shortcomings depend also on the environment.

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Cermet potentiometers

Audial Model A uses cermet potentiometer as premium part. The reason is simple: cermet is sonically clearly superior to any other potentiometer type. Cermet potentiometers are still however relatively unknown, so more information follows.

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Model A volume control

Model A uses the low impedance shunt potentiometer. This article brings more details about this ultimate volume control.

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Asynchronous USB to simultaneous data converter board, interest check

Asynchronous USB Audio Class 2.0, galvanic isolation, two oscillators, and reclocked simultaneous data output. With U.FL output connectors it would be adequate companion to AYA II 2014 or DS board, and of course the great possibility to connect PC to Model S MkIII.

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AYA II DS, DIY edition

As announced a few months ago, we have another run of AYA II. This run, marked as DS, includes one update with respect to AYA II 2014: synchronous DEM clocking circuit is now more completely integrated, so it is not optional but integral part of this AYA II project.

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Model A, one year later: Power

The Model A shipped in 2015 can output up to 10 A current.

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Model S MkIII schedule

In addition to S/PDIF, MkIII version of this converter will also include direct PCM input, able to accept both commonly used I2S and TDA1541A specific simultaneous data protocol.

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Model A, one year later: Binding posts

Model A now sports copper plated copper binding posts. Here is why.

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AYA II 2014 DIY edition, second run

As an extension of original AYA II 2014 DIY edition offer, here is the second turn of AYA II 2014 orders.

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