The Audio-gd Compass (Was: Designing an alternative to the Zero DAC/amp)
Dec 19, 2008 at 10:56 PM Post #76 of 7,725
Yep, just like the one you can see in the Stello DA100
smily_headphones1.gif
.
 
Dec 21, 2008 at 5:35 PM Post #80 of 7,725
Hi everyone,
just noticed this interesting project... looks very tempting!
smily_headphones1.gif

If I'm right, audio gd has finished the first prototype pcbs (schematics and pcbs are looking more than fine) and I'm curious about one thing...

How much gain will the headamp have? It'd be unfortunate, if you can't use it with efficient headphone like ATs or similar.

Nevertheless it looks neat! If it's <=250 USD and is "dead silent" it'll become a true 'no brainer'.
smily_headphones1.gif


best regards,
bearmann
 
Dec 21, 2008 at 7:55 PM Post #81 of 7,725
Will this DAC take 24/96 USB input?
I see that it has a PCM2707 chipset.
 
Dec 21, 2008 at 8:06 PM Post #83 of 7,725
Dec 22, 2008 at 12:03 AM Post #84 of 7,725
Well I'm very interested in this project too. Looks great, I'm curious to see how it winds up, what the final product looks like and how much it would cost me to get one. I could use a stationary/desktop unit with a USB DAC and competent headphone amp (need to read up on the output a bit more).
 
Dec 22, 2008 at 1:41 AM Post #85 of 7,725
Would it cost a lot to have USB 2.0 instead of 1.1? I'm not sure if it's better, just heard random opinions that it might be superior in jitter/latency. Also, how hard would it be to get ASIO to work on this if we were to use it for the computer? Anyone want to write drivers for us heh heh.
 
Dec 22, 2008 at 2:10 AM Post #86 of 7,725
Correct me if i'm wrong but the PCM2707 in this build is only used as a USB to I2S converter of sorts which is then fed to the AD1852.
All D/A conversion is managed by the AD1852.

And the PCM2707 is recognised by windows (and osx?) without the need of extra drivers.
 
Dec 22, 2008 at 4:02 AM Post #87 of 7,725
Hmm, how critical is 24/96 support? I'll ask Kingwa about it.
 
Dec 22, 2008 at 5:50 AM Post #89 of 7,725
since this is targeted for more beginners, 24/96 support probably isn't a big priority (unless it doesn't add much to the cost). If it adds a significant amount to the cost it's probably better to leave it out.
 
Dec 22, 2008 at 6:13 AM Post #90 of 7,725
Quote:

Originally Posted by xxbaker /img/forum/go_quote.gif
since this is targeted for more beginners, 24/96 support probably isn't a big priority (unless it doesn't add much to the cost). If it adds a significant amount to the cost it's probably better to leave it out.


I'm no expert in electronics but doesn't that just come down to the DAC chip selected?

Quote:

Originally Posted by Hottuna_ /img/forum/go_quote.gif
Correct me if i'm wrong but the PCM2707 in this build is only used as a USB to I2S converter of sorts which is then fed to the AD1852.
All D/A conversion is managed by the AD1852.

And the PCM2707 is recognised by windows (and osx?) without the need of extra drivers.



Agreed I think the PCM2707 is there purely to provide USB input. Maybe it would be cheaper to not have it but as an optional addon in the form of a breakout box?

EDIT: Also um imo the lineout/bypass 3.5mm jack should be at the back of the unit for aesthetics
 

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