Music server with TDA1541 (I2S direct) - diyAudio
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Old 1st August 2006, 02:16 PM   #1
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Default Music server with TDA1541 (I2S direct)

Here is my 160GB server base on the TVIX module with TD1541 and I2S tapped from the TVIX board.
Output stage is a variation of Mr Pass D1 (jfet circuit thanks to stefanobilliani)
And the sound is the best I had so far. It was a big jump in quality when dropping the cs8414 and go I2S direct.

Here's a pic. Everything in a wooden box.
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Old 1st August 2006, 02:37 PM   #2
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Close up of the I2S connection.
The original CS4340 dac was pull and I2S signal tap from those pads.
The TD1541 uses LT1021 for +5V and TL431 for -5V and a larger discrete power stage for the -15V (not shown here)

OsCon, ZL and stack film type for various decoupling.

The I2S is output from the dsp chip EM8511.
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Old 1st August 2006, 02:46 PM   #3
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The under side of the point-to-point 1541 dac.
Ugly, but it works. A small copper foil ground is use directly under the dac. All decoupling is to the analog ground.
A large tant cap is used for the LT1021 as suggested by the datasheet.

Hopeful, my next tweak to this dac will be the DEM reclock but not enough time.

...Chuck T
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Old 1st August 2006, 03:04 PM   #4
dddac is offline dddac  Germany
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also a way to do it !!

I 100% agree on the improved sound by bypassing the spdif interface ....


Question, how do you interface with the server? I see no screen or so ?


Doede
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Old 1st August 2006, 03:13 PM   #5
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This is the TVIX media player before I took it apart.
http://www.tvix.co.kr/Eng/Products/M3000U.aspx

But it does sound so much better in its current mutilated form.

I use EAC to rip all my CD in wav format to my 160G hd. This media player needs to connect to the TV for the display and selection of songs.

In its original form, the TVIX mades are very good transport, quite a bit better than the Philips 963 dvd I once had. But the true potential is in using its I2S. It made you wonder why SPIF was invented in the first place.
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Old 1st August 2006, 03:21 PM   #6
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Hi dddac,

There is a small board attach to the side next to the large ferrite toroid, that is the infra-red with 3 led for status. I drill holes in the front panel for the infra-red and leds.

I use component cable to connect to the TV, not yet connected in my first pic, but you can see all the rca sockets next to the TVIX board.

Yes, death to spif.
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Old 2nd August 2006, 03:38 PM   #7
kec is offline kec  United States
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Hey ChuckT,

Interesting use of the TVIX. I actually have one of those, but it took a dump. When I boot it up I get no display, nothing at all. And I just missed the warranty deadline - DOH!

Anyway, nice use of the TVIX.

-Ken
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Old 2nd August 2006, 05:24 PM   #8
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Sorry to heard that, I was rough in handling the TVIX and it still survive.
There were several times I thought it didn't output video but it turn out I had got the component video connection wrong.
Was it just no display? Did the led go on and harddisk spinning?
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Old 2nd August 2006, 06:33 PM   #9
kec is offline kec  United States
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The hard disk was spinning, just no display. Maybe the video chip went out. I haven't had the time to troubleshoot it yet. If I get time....

-Ken
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Old 6th April 2008, 04:03 AM   #10
edraket is offline edraket  Netherlands
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hi Chuck,

you're tvix project looks great. And there are several models of the tvix with the EM8511 available for low prices. Do you know the newer chipsets also have the possibility to tap I2S?

And how about the clock? Do you use the internal clock? Is there a possibility to go for an external (really good) clock? Do you have a scheme of the tvix?

eddy
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