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Old 30th December 2002, 05:36 PM   #1
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Default 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
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Old 30th December 2002, 06:13 PM   #2
OliverD is offline OliverD  Germany
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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.
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Old 31st December 2002, 11:44 AM   #3
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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.
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Old 1st January 2003, 04:01 AM   #4
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Default 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
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Old 1st January 2003, 09:48 AM   #5
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