Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 19th August 2011, 10:12 AM   #1
reverse is offline reverse  New Zealand
diyAudio Member
 
Join Date: Feb 2004
Location: New Zealand
Default Dolby Decoder Board

Hello,

I've been looking for ages to find a DIY style decoder for DTS/Dolby. The preamp/power amp is all sorted with remote etc - currently audio supplied from DVD player builtin decoder but want to change to either optical from PS3 or similar.

Ideally, what would be nice would be a simple HDMI --> analogue to get the uncompressed streams.

Was wondering if anyone had pulled apart whats called a 5.1 AudioRush or comes under many other names it seems for about 50 delivered.

Something like this, with absolute minimum settings would be primo. I'd think adjustable delays etc I would put into the analogue preamp stage (i don't know enough about digital electronics to build digital delay), as would be the low pass for the sub channel if this thing doesn't already do that.

How have other people build their home theater sounds without resorting to a standalone decoder box?

Cheers.



looks like this:
Click the image to open in full size.
  Reply With Quote
Old 19th August 2011, 07:30 PM   #2
diyAudio Member
 
Join Date: Jun 2011
I'm far from an expert in this space - but from what I understand it's almost impossible to make this type of venture work commercially due to the very strict licensing requirements for Dolby decoding technologies, etc.

Maybe I'm wrong and there's a bunch out there - but my brief search into this very thing was fruitless due to this issue.

Most advice seems to be "find a cheap HT proc/amp with pre outs"...

Sorry. Hope it's helpful.
Lane
  Reply With Quote
Old 20th August 2011, 07:57 AM   #3
diyAudio Member
 
Join Date: Jun 2011
Location: SCOTLAND
You could always rip one of these apart and build into a premp...

NEW MOCHA JY-M2 AC3 DTS 5.1 DIGIT AUDIO DECODER for DVD | eBay

or this kit might do:

http://www.ebay.co.uk/itm/5-1-DTS-AC...item2eb5cf2aca
  Reply With Quote
Old 20th August 2011, 04:02 PM   #4
diyAudio Member
 
theAnonymous1's Avatar
 
Join Date: Feb 2004
Location: Anonymityville
You want HDMI -> Analog 5.1/7.1?

There's this....

HDMI To Optical Surround Sound 5.1/7.1 Stereo Converter | eBay

BTW, the Chinese don't give a rats *** about licensing. I don't have much sympathy for the licensing agencies in these cases either; I think it's BS what they charge.
__________________
"If you don't like funerals don't kick sand in Ninja's face." - Ninja
  Reply With Quote
Old 22nd August 2011, 10:44 AM   #5
reverse is offline reverse  New Zealand
diyAudio Member
 
Join Date: Feb 2004
Location: New Zealand
Thanks for those links.

With a bit more digging, I ground the following review:


HD Audio Rush 5.1 Decoder Review
  Reply With Quote
Old 7th September 2011, 12:54 AM   #6
dangus is offline dangus  Canada
diyAudio Member
 
Join Date: May 2004
Location: Vancouver Island
Probably better to buy something like a Technics SH-AC500D. Typically less than $100 on eBay. SGHT rated it class B, which was pretty high praise considering they normally favour things with one or two more digits in the price tag. It makes a fine standalone digital pre/processo since it has a remote control for volume, input selection, and surround modes. A generous 4 S/PDIF inputs (2 RCA, 2 Toslink), and one set analogue pass-through (no volume, but if you can live without DTS, I believe the SH-AC300 did volume control on the analogue input). A bunch of other brands produced similar modestly priced boxes intended as add-ons to "digital READY" AV receivers, but AFAIK only Technics produced a second generation model with DTS. One other gotcha: the speaker management features (phantom centre, bass management) seem to be bypassed when DTS is used: when I was running a 4.2 setup, I added a few resistors to my active crossover to sum in the LFE and Centre signals to L & R so I could watch my two DTS laserdiscs properly.

Supposedly a Creative Extigy can serve as a standalone DD decoder. There's also been a few car audio DD processors; with luck you might find one on the bargain table at a local car stereo store (like I did, with a Technics CY-AC300). And some boxes that were bundled with or intended as upgrades to 5.1 computer powered speakers. Midiland, Klipsch, Roland, Creative. Overpriced on eBay, but you might find a dusty sun-faded box at a local computer store.

But why bother? HDMI audio makes DD obsolete. DTS less so, since it supports much higher bitrates.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Does it exist: Dolby Digital Decoder Chip Or Board? 6f6 Parts 7 14th March 2007 11:05 PM
Dolby Decoder hop_305 Digital Source 4 7th August 2004 11:34 PM
With a 5.1 sound card, do I still need a Dolby Digital decoder? JCoffey Digital Source 14 30th April 2004 02:10 PM
about Dolby 5.1 decoder Corsairr Digital Source 7 22nd December 2003 12:51 AM
Dolby/DTS decoder in India Vivek Everything Else 8 18th October 2003 06:49 AM


New To Site? Need Help?

All times are GMT. The time now is 02:50 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2