Computer to Accuphase via HS-Link
#1
HS-Link (first digital input from the left) is a proprietary protocol by Accuphase:
 
[Image: dc-950_digital_io.jpg]

In theory this should be the 'cleanest', 'unmolested' audio input feed for Accuphase products. Is it possible to by-pass the USB input and use this instead?

This is what I know about HS-Link. Absolutely nothing! [Image: confused.gif] However, my collegue Steve has kindly provided the following graphic.

So here's the little we know so far about Accuphase's HS-Link:
  1. It is a balanced I2S signal.
  2. RJ-45 female input JACK (d'uh!)
  3. Pin out are as follows:
    [Image: hslink.png]
  4. Pin-1 to Pin-6 are balanced inputs (i.e. from player to DAC). These are the balanced I2S stuffs for long distance transmission.
  5. Pin-7 and Pin-8 are outputs from DAC to player. Not entirely sure if this is balanced or not, but assuming it's balanced.
  6. Ground is probably via STP's shield.
  7. It sorta works with Denon Link (Audio cuts out every few seconds)
So the key is literally on point 5, key. We assume this key is an encryption key (token) sent by the Accuphase DAC to the Accuphase DP players, and the DP will not transmit the I2S packets unless a valid token is received. Big Grin

This in theory shouldn't be a problem with computers, because there is no DRM.
Snakeoil Operating System - Music, your way!
Reply

#2
First thing to try is to send a balanced I2S feed with the 2 Key pins floated. This is the only thing I have on my hand at the moment, a Audio-Gd DI-2014:
 
[Image: audio-gd-di-2014.png]
What's a Digital Interface? It's a box that will reclock USB or S/PDIF and re-transmit the 'cleaned' audio signal in either I2S, balanced I2S and S/PDIF:
[Image: audio-gd-di-2014-pinouts.png]
So the idea is to cut up a HDMI cable and a STP cable, and pin for pin match the output of the DI-2014 into the input of the HS-Link. Sounds easy enough I guess, but can be dangerous. (See the please note section above).

Hopefully in the next few weeks I can get to try and see what happens.... Hopefully nothing get's blown up as I probably wouldn't bother getting this fixed if that happens [Image: bird.gif] . This input goes direct to the FPGA chip, so if that is blown, likely all inputs will no longer work.

The 'direct input' is one temptation that's hard to resist though, no conversion of audio signal should in theory yield better audio. Granted technically there is still a conversion happening with the DI-2014 (as it's converting USB data from the copmputer). This is just a 'proof of concept' for now.. If this works, we will have to look for a PC solution (i.e. an audio card with balanced I2S out, e.g. Pink Faun). AFAIK there is no Linux driver for the Pink Faun yet. I wonder if I'm good enough to write one. [Image: steal.gif]

Update: Got the cables. Will attempt to do this over the Christmas break. Watch this space :kiss: !!! Don't expect HS-Link will work, but hey, who knows really?
Snakeoil Operating System - Music, your way!
Reply

#3
(14-Dec-2017, 10:09 AM)agent_kith Wrote: First thing to try is to send a balanced I2S feed with the 2 Key pins floated. This is the only thing I have on my hand at the moment, a Audio-Gd DI-2014:
 
[Image: audio-gd-di-2014.png]
What's a Digital Interface? It's a box that will reclock USB or S/PDIF and re-transmit the 'cleaned' audio signal in either I2S, balanced I2S and S/PDIF:
[Image: audio-gd-di-2014-pinouts.png]
So the idea is to cut up a HDMI cable and a STP cable, and pin for pin match the output of the DI-2014 into the input of the HS-Link. Sounds easy enough I guess, but can be dangerous. (See the please note section above).

Hopefully in the next few weeks I can get to try and see what happens.... Hopefully nothing get's blown up as I probably wouldn't bother getting this fixed if that happens [Image: bird.gif] . This input goes direct to the FPGA chip, so if that is blown, likely all inputs will no longer work.

The 'direct input' is one temptation that's hard to resist though, no conversion of audio signal should in theory yield better audio. Granted technically there is still a conversion happening with the DI-2014 (as it's converting USB data from the copmputer). This is just a 'proof of concept' for now.. If this works, we will have to look for a PC solution (i.e. an audio card with balanced I2S out, e.g. Pink Faun). AFAIK there is no Linux driver for the Pink Faun yet. I wonder if I'm good enough to write one. [Image: steal.gif]

Update: Got the cables. Will attempt to do this over the Christmas break. Watch this space Kiss !!! Don't expect HS-Link will work, but hey, who knows really?

Hi AK,
Any update on getting the HS-link connection working.
Now I've gone to an Accuphase DP-560 it would be nice the use an IsS connection.
Reply

#4
(13-Aug-2018, 04:19 PM)a.dent Wrote: Any update on getting the HS-link connection working.
Now I've gone to an Accuphase DP-560 it would be nice the use an IsS connection. 


Congrats on the move to Accuphase... You can't go wrong with this brand really.

Havn't had a chance to look into this yet unfortunately. So many other things cropped up this is relagated to the back burner.. Sad

Seeing it has a USB input (with support up to 11.2896 MHz/1-bit DSD), the DP-560 might support native DSD. Have you tried the SoTM to this USB and see if it works? If not, maybe it's possible to get this working in Snakeoil OS. All I need is the diagnostics file (will probably need 1 or 2 goes to get it working though).
Snakeoil Operating System - Music, your way!
Reply

#5
Note to self, need to get myself one of this one day:
 
[Image: RJ45.png]
Snakeoil Operating System - Music, your way!
Reply

#6
(11-Sep-2018, 01:08 PM)agent_kith Wrote: Note to self, need to get myself one of this one day:
 
[Image: RJ45.png]
I think this would help you more:
http://www.twistedpearaudio.com/digital/teleporter.aspx
Reply

#7
(13-Aug-2018, 04:32 PM)agent_kith Wrote:
(13-Aug-2018, 04:19 PM)a.dent Wrote: Any update on getting the HS-link connection working.
Now I've gone to an Accuphase DP-560 it would be nice the use an IsS connection. 


Congrats on the move to Accuphase... You can't go wrong with this brand really.

Havn't had a chance to look into this yet unfortunately. So many other things cropped up this is relagated to the back burner.. Sad

Seeing it has a USB input (with support up to 11.2896 MHz/1-bit DSD), the DP-560 might support native DSD. Have you tried the SoTM to this USB and see if it works? If not, maybe it's possible to get this working in Snakeoil OS. All I need is the diagnostics file (will probably need 1 or 2 goes to get it working though). 

Hi, I am also very interested in the possible opportunity of connecting Non-Accuphase devices via HS-link (I2S). Cool Have you had a chance to give it a try? Cheers, Mark.
Reply

#8
(30-Jan-2019, 06:39 PM)Markuzz Wrote: Hi, I am also very interested in the possible opportunity of connecting Non-Accuphase devices via HS-link (I2S). Cool Have you had a chance to give it a try? Cheers, Mark. 
What do you mean by non accuphase devices? As a source? Right now, even if I get this to work (a big if), the source will be a PC. Other hardware is beyond my capability unfortunately. Sad
Snakeoil Operating System - Music, your way!
Reply

#9
This is the only post I found regarding this topic. I´d like to do the same with Denon Link, so if anyone ever finds a solution - let us know.
Reply

#10
(07-Dec-2022, 05:53 PM)ozorfis Wrote: This is the only post I found regarding this topic. I´d like to do the same with Denon Link, so if anyone ever finds a solution - let us know.

A crazy friend of ours connect a player with DenonLink 3 to an Accuphase DAC. You can briefly hear music before the audio is cut off.. So the two are very close to being compatible, probably I2S. To be honest we havn't progressed any further than that.

Number 1 thing that I'm personally unsure about is the legalities moving forward. And even if it's legal, we need an electronics guru to decipher the comms and work out what is wrong.
Snakeoil Operating System - Music, your way!
Reply



Bookmarks

Possibly Related Threads…
Thread Author Replies Views Last Post
  Every 7.8μs your computer’s memory has a hiccup agent_kith 0 1,146 04-Dec-2018, 02:57 PM
Last Post: agent_kith



Users browsing this thread:
1 Guest(s)

[-]
Our Sponsors

[-]
Welcome
You have to register before you can post on our site.

Username/Email:


Password:





[-]
Latest Threads
ZimaBoard 2x NIC, 2x SATA, 2x USB, 1x PC...
Last Post: agent_kith
26-Mar-2024 12:04 PM
» Replies: 13
» Views: 612
LMS Upgrade ?
Last Post: uglymusic
15-Mar-2024 09:14 PM
» Replies: 7
» Views: 149
Squeezebox shutdown
Last Post: TripleX
13-Mar-2024 07:34 AM
» Replies: 4
» Views: 69
MP3 Not Playing
Last Post: Coacharnold
10-Mar-2024 10:25 AM
» Replies: 3
» Views: 52
Fail to install myMPD
Last Post: hkphantomgtr
03-Mar-2024 08:45 PM
» Replies: 9
» Views: 195
Intel HFI Driver Can "Save Tons Of CPU C...
Last Post: hkphantomgtr
28-Feb-2024 09:15 PM
» Replies: 0
» Views: 41
Announcing Snakeoil Measurements 1.3.0
Last Post: agent_kith
26-Feb-2024 10:02 PM
» Replies: 94
» Views: 4137
More Problems with Squeezelite in 1.3
Last Post: Coacharnold
17-Feb-2024 09:47 PM
» Replies: 2
» Views: 69
Snakeoil Music server & Snakeoil its own...
Last Post: Snoopy8
17-Feb-2024 11:20 AM
» Replies: 8
» Views: 364
RoonBridge (64 bit only)
Last Post: scrarfussi
15-Feb-2024 08:26 PM
» Replies: 3
» Views: 4123

[-]
SnakeoilOS Mission Statement

Our mission is to create a free to use computer OS that is easy to install, intuitive to operate and play music that will connect and engage with you emotionally.

SnakeoilOS gives you the freedom to spend more time on listening, enjoying and exploring music. Wasting time on computers is now a thing of the past! Everything is constantly evolving/improving. Please check back often for updates.

If you like this project, do show your support with a small token donation. All donations collected will be used to run this website, and for purchasing new equipment for the project.


Powered By MyBB, © 2002-2024. Theme © Melroy van den Berg.