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USB-->I2S or SPDIF converter

post #1 of 12
11/22/11 at 2:41pm
Thread Starter 

I want ot make a 24/96 USB DAC,so PCM2704 is not suitable,since it gives me only 16/48.

Recommend me a chip pleasesmily_headphones1.gif

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post #2 of 12
11/22/11 at 3:29pm

Wolfson WM8501?

 

I think with USB you'll be limited to 48 kHz.


Edited by Iniamyen - 11/22/11 at 3:39pm
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post #3 of 12
11/22/11 at 6:40pm

I am very happy with ES9018. It is a 32bit/192kHz DAC. In practice it can work with sampling rates up to 384 kHz. USB is not limited to 48 kHz. There are many devices on the market that can handle much higher sampling rates over USB.

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post #4 of 12
11/22/11 at 11:01pm
Thread Starter 

Guys,I meant the device that has USB input and outputs SPDIF or I2ssmile.gif

The DAC is PCM1794

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post #5 of 12
11/23/11 at 4:56am

Single "chip" solution =

http://www.gfec.com.tw/pro_list.php?language_page=english&class1_serial=141

 

Multi chip solution =

http://www.xmos.com/products/development-kits/usbaudio2

 

See if you can figure out what the difference is. wink_face.gif

 

 

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post #6 of 12
11/23/11 at 3:16pm
Thread Starter 

Thanks

smile.gif

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post #7 of 12
12/3/11 at 1:20pm

 

TE7022L is a popular chip, used in cheap converters like the "HA Info U2" or DAC/Amp's like the Fostex HP-A3.

 

 

For 24/192 over USB the Musiland Monitor is the cheapest solution I think - http://www.ebay.com.au/itm/360215837784

 

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post #8 of 12
12/4/11 at 1:19am

Correct me if I'm wrong, but all the usb audio ICs that can handle 24/96 or more (let alone adaptive or async mode) need some kind of firmware configuration and do not work out of the box like the pcm270x and the likes.

So if you got the required programming/hardware skills or if you are eager to learn (this is not going to be easy or fast), you can possibly make your own USB 24/96+ receiver.

The easy way is to incorporate a module that is capable of 24/96+ (you need drivers and the right IC for sampling rates more than 96K or 24bit from USB  if you are using XP, I'm not sure about 7 or linux) or a product like m2tech usb to spdi/f converter.

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post #9 of 12
12/4/11 at 1:33am

One thing I forgot, TI used to produce the TAS1020 and provides a firmware development kit (software) but now this is obsolete/not recomended for new designs and has been replaced with a DSP (BGA package, the one with all the pins lying underneath to make even soldering impossible ), so now it is out of the question for a regular DIYer to work his way out with this...

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post #10 of 12
12/4/11 at 3:20pm
Thread Starter 

What do you guys think about these:

http://www.via.com.tw/en/products/audio/usb/vt1728a/index.jsp

http://www.via.com.tw/en/products/audio/usb/vt1731/index.jsp

Especially the second onesmile.gif.Tenor won't sell small quantity of the TE7022.

Guess whatsmile.gif I'll get 2 of the ESS Sabre 32 chips at 50$ each,so...

the 32/384 USB controller then?Wrote to VIA,still no reply.Any place I can buy the thing?

It's a university project.Money not objective to some extent.Wow,it's gonna be the high-end monstersmile.gif

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post #11 of 12
12/4/11 at 8:11pm

 

University project? That's cool. :)

 

Hmmm... how did you find the VT1731 chip?

 

Have you seen the Musiland Monitor 03 yet? You may want to research how they achieved 32/384 over USB as well.

 

 

 

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post #12 of 12
12/5/11 at 1:00am

How about these:

http://www.ti.com/ww/en/embedded/c5000/index.shtml?DCMP=dsp-c5000-c553x-110830&HQS=cheapdsp

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