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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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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