Audial AYA 4 User manual

AYA 4
USER MANUAL
Revision 0, October 2018

IMPORTANT!
1. This manual is a guide only.
2. Do not expose this device to rain or moisture, excessive heat or mechanical force.
3. Use this device exclusively with specified voltages.
4. Unplug the device from the wall outlet during a lighting storm.
Copyright © 2018, Audial d.o.o.
www.audialonline.com
This manual comprises introducing information on use and performance of this device. For more
information please refer to the Audial web site, or send your questions to [email protected].

AYA 4 DAC
Audial AYA 4 is a high quality, TDA1541A based non-
oversampling D/A converter, with USB and S/PDIF
inputs.
The AYA 4 USB input stage operates as asynchronous
(master) USB device, so it also generates the clock
signal for D/A conversion.
Two low jitter clocks are included, one that works with
44.1/88.2/176.4/352.8 kHz, and the other that works
with 48/96/192/384 kHz audio sampling frequencies.
This way the unit achieves clean clocking scheme, and
all the audio clock signals in the system are generated
only by frequency dividing, and not by using PLL
synthesizers.
The units with 11.2896/12.288 MHz master clocks can
accept up to 192 kHz, and units with 22.5792/24.576
MHz up to 384 kHz audio sampling rates.
The USB stage also provides galvanic decoupling
between the USB and D/A stage, thus also separating
PC from audio circuits.
The S/PDIF stage provides real 75 Ohm BNC,
transformer coupled input, and is operational up to 96
kHz.
Optionally, AYA 4 can provide PCM direct input to
TDA1541A, by using PCB U.FL connectors, and it can
accept I2S or simultaneous data protocol. The
information about such optional features is provided
separately, to the individual customers.
USING THE AYA 4
AYA 4 mains connector and switch are located on the
back plate, while the USB / SPDIF input selector is
located on front plate, along with the LED indicator,
which lights green for USB, and orange for S/PDIF
input.
AYA 4 DAC is easy to use device, and for normal use it
requires no special maintenance or care.
It is however not recommended to leave the AYA 4
permanently powered up, because its D/A converter
chip (TDA1541A) is a classic TTL architecture, so it
dissipates more power than it is usual for devices of this
kind these days. Normally, leaving the AYA 4 powered
off overnight will ensure many years of reliable
operation.
AYA 4 achieves claimed technical performance
(distortion, frequency response etc.) right from the
start, however it needs a couple of weeks of burning in
to perform its best in subjective sonic terms.
WARRANTY
Audial claims proper working of this product for two
years. Audial is obliged to correct any malfunction
within this period, at no charge, either by competent
repair service, or by swapping the sold unit by the new
one.
For the units sold directly by Audial, invoice is also
guarantee certificate. Since Audial maintains own data
base of directly sold units, the original buyers in most
cases won’t need it. Warranty is still fully transferrable
from original to subsequent owner(s), however in this
case we will probably ask for the invoice.
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Audial AYA 4

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USB AUDIO CLASS 2.0
AYA 4 USB stage employs USB Audio Class 2.0
definitions.
Mac OS X and Linux are natively USB Audio Class 2.0
compliant for several years now, and this device hence
does not require special driver when used with Mac OS
X or Linux.
Since September 2017, Windows 10 (1703) also
supports USB Audio Class 2.0 definitions, so the AYA 4
is plug and play with recent Windows 10 too. Once it is
connected to Win 10 machine, the small window will
pop up in the bottom right corner of the screen,
reporting about the initial connection routine, and
once this process is finished, the device can be found
as playback audio device, available in the system.
DEDICATED WINDOWS DRIVER
In addition, Audial provides dedicated Windows driver
for this device, which is still necessary with earlier
Windows versions. This driver also provides additional
functionality such as firmware update, ASIO interface,
buffer length control, and it can be generally preferred
soundwise.
Users can download this driver from Audial web site.
Driver version 1.26 can be installed to Windows XP,
Vista, 7, 8, 8.1 and 10. Later driver version 2.10 however
improves on compatibility with later PC systems, and
can be installed to Windows 7, 8, 8.1 and 10. All driver
versions are compatible with both 32 and 64-bit
Windows. Please however note that the driver version
2.10 does not support 4 channel functionality.
To install the driver, please unzip provided file, and run
setup.exe. Installation window will pop up, and at one
stage you will be asked to connect the device. Also,
during this process, depending on your Windows
version and security settings, you might be asked a
couple of times to allow the installation, so please do
so. These windows will look like this.
Once the installation is complete, you can configure
your settings by using the control panel, available in
Windows Start Menu -> Audial.
Audial AYA 4

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Audial AYA 4
AYA 4 front plate
AYA 4 back plate
From left to right: RCA output connectors,
S/PDIF input connector, USB input connector,
mains connector, mains switch.
AYA 4
D/A CONVERTER
!
220-240VAC ~50-60Hz FUSE T1A
AYA 4 #A01-2345
Made in Serbia
POWER

6Audial AYA 4
SPECIFICATIONS
INPUTS:
- USB 2.0, supports 2.0 Class Definitions for Audio Devices, asynchronous operation;
Fs max 192 kHz or 384 kHz, depending on master clock frequencies
- S/PDIF, 75 Ohm BNC; Fs max 96 kHz
- PCM direct, I2S or Philips simultaneous data protocol, U.FL PCB connectors (optional)
OUTPUT:
RCA, 2.1 V RMS, output impedance 130 Ohm
FREQUENCY RESPONSE:
Sin(x)/x equivalent:
@ fS=44.1kHz: -3.2dB @ 20kHz
@ fS=88.2kHz: -0.8dB @ 20kHz
@ fS=192kHz: -0.2dB @ 20kHz
@ fS=384kHz: -0.1dB @ 20kHz
TRANSIENT RESPONSE:
Clean with no overshoot or ringing
ABSOLUTE PHASE:
Correct
HARMONIC DISTORTION (@ 1kHz):
0.12% @ -6dBFS (I/V dominated)
0.06% @ -12dBFS (I/V dominated)
0.9% @ -60dBFS(D/A dominated)
INTERMODULATION DISTORTION (CCIR):
0.2%
MAINS VOLTAGE:
220-240VAC/50-60Hz or 110-120VAC/50-60Hz
DIMENSIONS (W x D x H):
330x 215 x 66 mm, including feet, but excluding knob and connectors
WEIGHT:
Approx. 3 Kg

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Audial AYA 4

Copyright 2018 Printed in Serbia© •