digital out from dvd

vacuumhead · 30th December 2002, 05:36 PM

Can anyone help? I've got a cheap chinese DVD (Hitachi Fujian), which has optical and coax digital outs. I would like to build DAC which would give me at least 2 channels. Any link will help as well as practical solution to my problem. Why building when it's equipped with analog out too - because I hear a buzz (maybe switching PSU), maybe grounds, but it sucks. Cheers. Jack

OliverD · 30th December 2002, 06:13 PM

You can use any DIY DAC project mentioned at this site provided

a) your DVD-Player is setup to output PCM rather than some encoded multi-channel format like AC3 (see setup menu)

b) your DVD-Player is capable of downsampling to 44.1 kHz or 48 kHz, OR your DAC has a 96 kHz compatible receiver chip

Since your unit probably won't play DVD-Audio (don't mix it up with audio tracks on a DVD-Video), you don't have to bother with downsampling from 192 kHz.

Getting more than 2 channels out of the digital output is very very difficult, you would need an external AC3/MPEG decoder which comes in some SMD package virtually impossible to solder by hand.

Anyway, I wouldn't accept even a cheap player to produce audible hum, maybe you have a ground loop or some faulty connections.

Another approach to get a DIY multichannel DAC would be to skip S/PDIF and take the IIS signals from the internal DACS directly. Or you could tweak the power supply / output stage of your player.

Hope this helps.

Circlotron · 31st December 2002, 11:44 AM

Quote:

Originally posted by AMT-freak

Anyway, I wouldn't accept even a cheap player to produce audible hum, maybe you have a ground loop or some faulty connections.

I agree. A week ago I bought a Digitrex / Hiteker GK-1020. These things are AUD$99. That's USD$55.84, or 53.38 Euro's. That's half the price of anything else here, and it's quiet as a mouse. I got it only for playing CD's because of it's nice 24 bit A/D.

Mark Hathaway · 1st January 2003, 04:01 AM

Howdy Circlotron,

I didn't realise the 100 dollar barrier had been broken in Melbourne yet.

Who's selling them for 99 AUD?

at 99 bucks they are a bargin for the bedroom or garage as cd players.

Mark

Circlotron · 1st January 2003, 09:48 AM

Big W. Big W.

30th December 2002, 05:36 PM	#1
vacuumhead diyAudio Member Join Date: Jul 2002 Location: South Africa	digital out from dvd Can anyone help? I've got a cheap chinese DVD (Hitachi Fujian), which has optical and coax digital outs. I would like to build DAC which would give me at least 2 channels. Any link will help as well as practical solution to my problem. Why building when it's equipped with analog out too - because I hear a buzz (maybe switching PSU), maybe grounds, but it sucks. Cheers. Jack

1st January 2003, 04:01 AM	#4
Mark Hathaway diyAudio Member Join Date: May 2002 Location: Melbourne, Australia	where did u find the hiteker at 99 AUD? Howdy Circlotron, I didn't realise the 100 dollar barrier had been broken in Melbourne yet. Who's selling them for 99 AUD? at 99 bucks they are a bargin for the bedroom or garage as cd players. Mark

1st January 2003, 09:48 AM	#5
Circlotron diyAudio Member Join Date: Jun 2002 Location: Melbourne, Australia	Big W. Big W. __________________ Best-ever T/S parameter spreadsheet. http://www.diyaudio.com/forums/multi...tml#post353269

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Progress report - digital crossover as a DAC - digital all the way to the amps	Ken L	Multi-Way	0	26th November 2006 11:42 PM
digital crossover w/digital output?	ezkcdude	Multi-Way	30	3rd August 2006 01:01 AM
Get digital signal from an old CD-Rom without digital output	genome	Digital Source	5	3rd February 2004 11:54 PM


	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

30th December 2002, 06:13 PM	#2
OliverD diyAudio Member Join Date: Nov 2002 Location: Germany	You can use any DIY DAC project mentioned at this site provided a) your DVD-Player is setup to output PCM rather than some encoded multi-channel format like AC3 (see setup menu) b) your DVD-Player is capable of downsampling to 44.1 kHz or 48 kHz, OR your DAC has a 96 kHz compatible receiver chip Since your unit probably won't play DVD-Audio (don't mix it up with audio tracks on a DVD-Video), you don't have to bother with downsampling from 192 kHz. Getting more than 2 channels out of the digital output is very very difficult, you would need an external AC3/MPEG decoder which comes in some SMD package virtually impossible to solder by hand. Anyway, I wouldn't accept even a cheap player to produce audible hum, maybe you have a ground loop or some faulty connections. Another approach to get a DIY multichannel DAC would be to skip S/PDIF and take the IIS signals from the internal DACS directly. Or you could tweak the power supply / output stage of your player. Hope this helps.

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read