background image

Page 17

XDA-2

ASRC (asynchronous sample rate converter)

The ASRC is a sophisticated digital processor that re-samples incoming digital audio to 

a fixed 96k sample rate controlled by a very low-noise digital clock and, as part of the 

conversion process, eliminates virtually all jitter on the incoming signal. 
Different source devices and cables generate widely varying amounts of jitter (USB audio 

from a computer is notoriously high in jitter). Excessive jitter tends to make music sound 

“blurred”, although the effect is somewhat subjective. Changing the sample rate also, in and 

of itself, subtly alters the way music sounds. If your source has excessive jitter, engaging 

the ASRC will definitely improve the way it sounds; if not, then you may or may not like how 

the re-sampling function sounds with a specific piece of music. There is no specific correct 

setting, although most people prefer having the ASRC on when using the USB input.
Since the ASRC may only produce an audible improvement in some situations, the  

XDA-2 offers you the option of bypassing the ASRC when desired, and choosing which 

way you prefer to listen in a given instance. When the ASRC is bypassed, it is out of the 

signal path, and the input signal remains at its original sample rate. (This mode is referred 

to as “bit-perfect” by some people.) When the ASRC is engaged, the input signal is always 

re-sampled to 96k. Each time you press the ASRC button on the remote control, the ASRC 

will toggle between On and Bypass (and the VFD will momentarily flash a status message 

telling you the current status). 

Note: When the ASRC is engaged, the display will still show the original incoming 

sample rate (when it displays the sample rate) rather than the re-sampled (96k) 

sample rate.
Note: The ASRC Bypass button takes effect immediately, and may be operated while 

music is playing to determine which way you prefer to listen to a given source.

Содержание XDA-2

Страница 1: ...XDA 2 Differential ReferenceTM DAC User Manual XDA 2...

Страница 2: ......

Страница 3: ...ERSONNEL Do not install the XDA 2 near or above any heat sources such as radiators heating vents or other apparatus that produces heat Do not block any ventilation openings or heat sinks Avoid install...

Страница 4: ...EABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL FCC Interference Statement Note This equipment has been tested and found to comply with the limits for a Class B digital device pursua...

Страница 5: ...n 3 About This Manual 4 Features 5 Unpacking 6 XDA 2 Front Panel 7 XDA 2 Remote Control 9 XDA 2 Rear Panel 10 Quick Start 13 Connection and Configuration 14 Operation 16 Care and Maintenance 18 Inputs...

Страница 6: ...Page 2 XDA 2...

Страница 7: ...plifier drives headphones with authority The XDA 2 is the ideal way to enhance the sound quality of virtually any audio system No matter your digital source or sources the XDA 2 is ready with multiple...

Страница 8: ...load the full length version of the User Manual from our website at www emotiva com We suggest that you read through the entire manual we kept things as short and direct as possible Even if you re an...

Страница 9: ...ity to jitter ASRC bypass mode Differential Reference balanced design with OPA 2134 precision op amps Incorporates a seamless high quality digital preamp with analog resistor ladder volume control wit...

Страница 10: ...ou unpack it please contact Emotiva immediately Gently remove your XDA 2 from the packing carton and remove all wrappings and shipping material It is important to save the box and all packing material...

Страница 11: ...uts Pressing Volume Up immediately cancels the mute function 3 Volume Up and Volume Down Buttons Pressing the Volume Up button raises the Volume pressing the Volume Down button lowers it A single pres...

Страница 12: ...respond to either the front panel controls or the remote control 6 IR Sensor Window The IR receiver for signals from the remote control is located behind this window It looks like a button but it is...

Страница 13: ...uts usually have a lot of jitter the jitter on other inputs varies depending on the source component and cables Excessive jitter tends to make music sound blurred although the effect is somewhat subje...

Страница 14: ...on the front panel and on the remote control adjust the headphone output level When no headphones are plugged in the Volume buttons adjust the main output level The XDA 2 stores both settings independ...

Страница 15: ...ted to a computer the XDA 2 will appear to the computer as a USB sound card or USB audio device and you will be able to select it as an audio output device The XDA 2 is a USB Audio Class 2 Device and...

Страница 16: ...A 2 with different operating systems will be available on the XDA 2 product page of the Emotiva website 7 Trigger In and Trigger Out The Trigger Input accepts a standard trigger signal to allow the XD...

Страница 17: ...o one or more digital audio sources If you re using a computer connected to the USB input install the appropriate USB driver Connect the analog output of your XDA 2 to a line level input on your pream...

Страница 18: ...et cable box or media client be sure that the device is set to output stereo PCM digital audio Output Connections The XDA 2 provides both balanced XLR and unbalanced RCA analog stereo connections Both...

Страница 19: ...2 VDC nominal trigger signal from another device via a standard 1 8 mono plug When the trigger is asserted the XDA 2 will switch On when the trigger is removed the XDA 2 will return to Standby mode Th...

Страница 20: ...will put the XDA 2 into Standby mode Standby Switch front panel Push Button The Standby switch is a small black push button which can be difficult to see in a dim room When the XDA 2 is in Standby mod...

Страница 21: ...rect setting although most people prefer having the ASRC on when using the USB input Since the ASRC may only produce an audible improvement in some situations the XDA 2 offers you the option of bypass...

Страница 22: ...aned gently with a soft rag If something sticky gets on the front panel or case of the XDA 2 it should be cleaned with a mild cleaning solution applied to a soft rag followed by wiping with a clean ra...

Страница 23: ...optical and electrical and AES EBU sample rates of 44 1k 88 2k 96k 176 4k and 192k at 16 bits and 24 bits depth Stereo PCM digital audio via USB USB Audio Class 2 sample rates and bit depths up to 19...

Страница 24: ...dB 3 dB 80 kHz 192 24 THD N all sample rates 0 0025 IMD 0 0025 44 16 0 0005 192 24 Signal to Noise S N Ratio 96 dB 44 16 113 dB 192 24 Crosstalk 100 dB 44 16 113 dB 192 24 Headphone Amplifier Output...

Страница 25: ...operating system Install the correct driver you can download drivers and instructions from the XDA 2 product page on the Emotiva website Problem Your computer is configured to use the XDA 2 as an outp...

Страница 26: ...if it is not made within the Term and if it is not made in strict compliance with the requirements of the How do you get service section What will Emotiva do Emotiva will at its option either i repai...

Страница 27: ...SR with a description of your problem and the serial number of the product for which the warranty claim is being made 2 The CSR will provide you with a returned material authorization number RMA 3 Shi...

Страница 28: ...te to the best of our knowledge at the time of publication In keeping with our policy of ongoing product improvement we reserve the right to make changes to the design and features of our products wit...

Страница 29: ......

Страница 30: ......

Отзывы: