The Monkey Posted November 17, 2008 Report Posted November 17, 2008 So here's my pickle. I am currently running my Apple Airport Express through my DAC1 using the AE's optical out. However, if I wanted to use a USB DAC, I would need a converter for the SPDIF--->USB conversion, correct? I'm aware that such things exist, but I'm wondering: a) Do they actually work well in practice, and Would such a converter work coming off the AE instead of directly out of a PC? In other words, most of the converters I have come across tend to have a PC in the mix, which indicates to me that maybe there's a driver issue. But I don't know shit, so help me out.
Fungi Posted November 17, 2008 Report Posted November 17, 2008 Wait wait, SPDIF to USB? I don't think there's any simple solution to that, only the other way around.
grawk Posted November 17, 2008 Report Posted November 17, 2008 There isn't a way to go optical to usb without a computer, unfortunately. It's a usb host vs usb client issue. Just because a criminals and lawyers usually go hand in hand, a criminal can't get you out of a speeding ticket without a lawyer...
The Monkey Posted November 17, 2008 Author Report Posted November 17, 2008 There isn't a way to go optical to usb without a computer, unfortunately. It's a usb host vs usb client issue. Dan, could you educate me a little more on this. I had hoped the Pico could be used with the AE, but now it looks like it can't...
grawk Posted November 17, 2008 Report Posted November 17, 2008 The pico definitely can be used with an airport express , you just have to pay someone more talented than me to replace the audio board inside the AEX with the pico boards, and put it in a different case, probably with an antenna. Otherwise, it can't, because the usb port on the AEX is for printers only.
n_maher Posted November 17, 2008 Report Posted November 17, 2008 Vincent, are you looking for an upgrade from your current setup? Or are you still looking to sell the DAC1 and get something else? If it's the sell it option I'd see if you can't find someone early next year to build you a y1 dac (amb's latest project). I might have one in time for the NYC meet.
deepak Posted November 17, 2008 Report Posted November 17, 2008 Vincent, are you looking for an upgrade from your current setup? Or are you still looking to sell the DAC1 and get something else? If it's the sell it option I'd see if you can't find someone early next year to build you a y1 dac (amb's latest project). I might have one in time for the NYC meet. I take it the y1 can be USB powered? # When used standalone, the USB interface board can be configured as a bus-powered USB-to-S/PDIF or USB-to-I
n_maher Posted November 17, 2008 Report Posted November 17, 2008 I take it the y1 can be USB powered? Now that you mention it I think it requires a wallwart. But since he was already using the DAC1 I figured it didn't need to be USB powered. I'm still unclear as to what Vincent's endgame here is. [edit]D'oh, spoke too fast. - When mated to each other, the two boards support all inputs and can be USB-powered or wallwart-powered. [edit2]I see you found the same info.
deepak Posted November 17, 2008 Report Posted November 17, 2008 Thanks Nate. I was a bit confused by the wording on AMB's site. I'm more interested in one of these for myself, but it would have to be USB powered.
Jon L Posted November 18, 2008 Report Posted November 18, 2008 I take it the y1 can be USB powered? The PCM2707 USB-to-spdif converter used sounds about twice better subjectively when *not* powered by the USB bus and powered by good batteries IME in other DAC's...
The Monkey Posted November 18, 2008 Author Report Posted November 18, 2008 I'm still unclear as to what Vincent's endgame here is. heh, you and me both. I'm sort of re-examining my whole rig here, but what I was originally thinking was sell the DAC1 and get a Pico. I'd use the Pico as a portable, but I was also hoping that it would be possible to use it with the AEX. Basically sell the DAC1 and get a portable amp/DAC with a little left over. Sounds like that's a no go w/r/t the Pico. But maybe the y1...
Beefy Posted November 18, 2008 Report Posted November 18, 2008 The PCM2707 USB-to-spdif converter used sounds about twice better subjectively when *not* powered by the USB bus and powered by good batteries IME in other DAC's... The incoming USB power on the y1 seems pretty well filtered by ferrites and capacitors, through a power multiplexer, and then regulated for each section of the DAC.
n_maher Posted November 18, 2008 Report Posted November 18, 2008 I trust Ti to not have just cobbled together your typical USB based power source.
deepak Posted November 18, 2008 Report Posted November 18, 2008 heh, you and me both. I'm sort of re-examining my whole rig here, but what I was originally thinking was sell the DAC1 and get a Pico. I'd use the Pico as a portable, but I was also hoping that it would be possible to use it with the AEX. Basically sell the DAC1 and get a portable amp/DAC with a little left over. Sounds like that's a no go w/r/t the Pico. But maybe the y1... It should be doable with the y1 as it says it will accept digital inputs.
The Monkey Posted November 18, 2008 Author Report Posted November 18, 2008 Wow, now this thing looks interesting.
n_maher Posted November 18, 2008 Report Posted November 18, 2008 Wow, now this thing looks interesting. Yup, the y1 is an amazingly full featured little bugger.
The Monkey Posted November 18, 2008 Author Report Posted November 18, 2008 Yup, the y1 is an amazingly full featured little bugger. I emailed with Ti, and he confirmed Dan's assessment above: you really can't go from SPDIF to USB without a computer and the y1 won't do it.
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