GUSTARD U16 ES8620 Support PCM32bit/768K DSD512 DOP And Native DSD Digital Interface

SKU: GUSTARD U16
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Adopting the latest USB audio interface solution ES8620 from ESS, USA.

Supports up to PCM 32bit/768KHz and DSD512, and supports both DoP and Native DSD.

Built-in audio dedicated toroidal transformer;

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Details

 

Driver & Firmware Upgrade:  https://download.shenzhenaudio.com/Gustard/

 

 

Adopting the latest USB audio interface solution ES8620 from ESS, USA

Supports up to PCM 32bit/768KHz and DSD512, and supports both DoP and Native DSD.

ESS's USB interface chip design is a completely optimized architecture for high-quality digital audio signal processing. It is not a general-purpose chip with USB digital audio interface code, so it has immediate impact on sound quality improvement;


 

A 128MB SDRAM is used as the system buffer and digital audio processing FIFO. Most of the space is used for internal scheduling of the USB interface master IC, and the redundant space is reserved as much as possible to ensure that other business logic operations other than the USB audio interface function in the main control IC do not interfere with the digital audio processing flow.

For optimal digital audio performance, digital audio processing FIFO capacity is reduced to a minimum to ensure minimum latency and jitter performance;

 

 

In order to ensure the highest quality digital audio signal and the lowest clock jitter performance, the machine uses up to three FPGAs to implement USB audio interface clock management and external 10M clock part of the audio clock frequency synthesizer, all using independent power supply to avoid FPGA Internal wiring interferes with each other;

 


In the USB audio interface part, an FPGA is used to implement the USB audio interface master IC running in the Slave mode.

That is, the USB interface main control IC receives the audio clock signal generated by the clock management FPGA and outputs only the digital audio data signal, thereby minimizing the digital signal interference introduced by the USB transmission link;

 


The audio clock synthesizing circuit of the external 10M clock part uses two FPGA main clock frequency synthesizers corresponding to the 44.1KHz and 48KHz fundamental frequencies respectively, which avoids the crosstalk of the internal wiring of the FPGA on the one hand, and also drains the FPGA chip on the other hand. The related resources, the frequency accuracy and jitter performance of the final synthesized audio main clock signal have reached the limit performance level of the current design;



The local audio clock source uses a dual femtosecond clock. This unit uses two US ACCUSILICON AS318-B ultra low phase noise crystals as the local audio clock source, RMS jitter as low as 88 femtoseconds (10Hz-1MHz); built-in audio dedicated toroidal transformer.



Built-in audio dedicated toroidal transformer;


 

IIS:

 


Product specifications

Digital input:

USB port: USB Type-B female port, support USB2.0


10M BNC input: input impedance 50 Ohm, maximum input amplitude 16dBm


Digital output:

RCA coaxial S/PDIF port: output impedance 75 Ohm, output level 500mVpp @75 Ohm load
24bit 44.1k-384k/DOP64-128


XLR AES3 port: output impedance 110 Ohm, output level 2.1Vpp @110 Ohm load
24bit 44.1k-384k/DOP64-128


OPTICAL TOSLINK port: 24bit 44.1k-192k /DOP64


Multi-function BNC port:
output impedance 75 Ohm, S/PDIF output level:750mVpp @75 Ohm load
Word Clock output level:3.3Vpp MAX @ noload
S/PDIF support specification (when S/P OUT is selected): 24bit 44.1k-384k/DOP64-128
Word Clock output frequency (when WCK OUT is selected): PCM: 44.1k-768k.
DSD: 2.82M-22.57M


IIS over HDMI interface (non-standard HDMI interface):
differential I2S signal with LVDS output level,
PCM: 32bit 44.1k-768k, DSD 2.82M-22.57M (DSD64-DSD512)


Other specifications

AC power supply: AC 115V/230V 50/60Hz
Power consumption: <15W
Dimensions: width 220mm * height 50mm * depth 170mm (without protruding parts)
Weight: 2.5Kg (including packaging)

Customer Questions & Answers

roy
roy

I bought a x20pro from you. if i take this interface and connect it to my gustard via AES output and the interface to the pc via usb should it improve the sound? or this device is for a different purpose?

10/23/18 3:59 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi roy,Yes, it can improve the sound.It's better connect by IIS. Thank you!

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Tomo
Tomo

I'm looking for MQA decoding converter. Do you support it?

10/27/18 9:23 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Tomo, it doesn't support MQA.Thank you!

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Paul
Paul

Hello Shenzhen,    Can you tell me if the U16 is based on the U12? - Or is it a new design? - Do you know how close the U16 will be to Singxer SU-1, sound quality wise?

10/30/18 6:32 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Paul, the U16 is a new design,which adopting the latest USB audio interface solution ES8620 from ESS. I'm sorry that I can't tell you exactly what the sound quality between SU-1 and U16, because the device will vary depending on the connected device.Thank you!

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Pavel
Pavel

Hello!  Could please ask developer following questions:  1. Is U-16 compatible with Holo Spring?  2. Will it be possible to change I2S pins via software?  3. Has U-16 native compatibility with Linux (no drivers needed)?  Thank you!

10/31/18 8:20 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Pavel, 1. U16 can compatible with Holo Spring. 2. It is possible to change I2S pins via software. 3. U16 can compatibility with Linux (no drivers needed). Thank you!

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brent
brent

I own a gustard x20 pro. Will this sound better with the x20 pro than the singer SU-1?    I would use an IIS connection if I was bought either the U16 or the SU-1

10/31/18 7:34 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi brent, The Gustard U16 can work with the X20 pro. Thank you!

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Brent
Brent

Hi, you didn't answer my question. Does the U16 sound better than the SU-1 with an X20 Pro? Assume I am using I2S cables for either.

11/1/18 10:28 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Brent, if you connect the interface with Gustard X20 PRO, the U16 will be better.Thank you!

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Daniele Cordazzo
Daniele Cordazzo

I OWN the U12 Model.  Which are the differences except the native dsd support that I don't care?  Does it Will worth the cost if you already got the U12?  Thank You  Dan

11/5/18 2:10 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi, The U12 adopts XMOS program while U16 adopts ESS program.The sound of U16 will be better.Thank you!

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Necone
Necone

Dear, I would like know if is USB input galvanic isolated? Thank for answear!

11/5/18 3:44 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Necone, the USB input doesn't galvanic isolated. Thank you!

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Roy
Roy

If I wanted to bypass the stock power supply and use my own power supply, do you know the input voltage of this board and what the current requirements are?

11/9/18 12:44 PM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi Roy,there has a voltage selection switch. The voltage of U16 can be adjusted to 110V or 220V. Thank you!

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Alexandre Molan
Alexandre Molan

Is it galvanic isolated ? Thanks

11/10/18 8:31 AM Asked.
shenzhenaudio.com
shenzhenaudio.com

Hi,It can not.Thank you!

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