Ganda
New Head-Fier
- Joined
- Jan 16, 2013
- Posts
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"Giant Killer" That is all I have with these AMP-DAC combo. I'd buy then for saving money and getting better sound quality.
I have a few 24/192 files; how does that get translated through the ODAC's output? Does it get converted to 24/96?
^ relating to this, how does a DAC down-sample something? e.g. if I tried to play a 24/96 ALAC file on an iPhone
Relating to this, but slightly off-topic, this website sells up-converted "HD" albums. Is there any benefit to this, or should I not even bother and just buy the regular 16/44 album?
http://www.hifitrack.com/en/node/21496
Quote:I have a few 24/192 files; how does that get translated through the ODAC's output? Does it get converted to 24/96?
^ relating to this, how does a DAC down-sample something? e.g. if I tried to play a 24/96 ALAC file on an iPhone
The ODAC doesn't accept 24/192 input. If you're playing 24/192 files, or any other format not accepted by the ODAC, they must be converted to a supported format (e.g., 24/96) before being sent to the ODAC. IOW, your question relates to your player not the ODAC.
Relating to this, but slightly off-topic, this website sells up-converted "HD" albums. Is there any benefit to this, or should I not even bother and just buy the regular 16/44 album?
http://www.hifitrack.com/en/node/21496
There's zero benefit unless they're remastering. If they are, you may or may not find the result superior. If they're simply "up-converting", the best you can hope for is they don't add audible artifacts.
Buy the CD instead.
So if I hear stuff through my headphones with 24/192 tracks , and the ODAC doesn't support 24/192, then what does the ODAC do?
Quote:So if I hear stuff through my headphones with 24/192 tracks , and the ODAC doesn't support 24/192, then what does the ODAC do?
The ODAC converts audio encoded in digital form (1's and 0's, a/k/a discrete) into analog form (waves, a/k/a continuous). It's these electrical waves which tell the drivers in headphones how to move back and forth, thus producing the sound we can hear. The 'DAC' in ODAC describes its purpose: It's a Digital-to-Analog Converter.
Your player software (or hardware) "down-converts" the 24/192 digital representation of the audio into a format the ODAC will accept (e.g., 24/96). Only then is the ODAC able to convert the "digital audio" into "analog audio".
I have built several for friends/family, but used larger cases (such as Box Enclosure B3 / B4, a Hammond, and a Context Eng). I figured that in 99% of scenarios where a device needs a USB DAC, said device would be a computer, not a smartphone, so the amp just had to be transportable, not pocket portable. The DAC is bus powered so it doesnt have anything to do with the batteries, except take up too much space in the B2 case. In theory, it could be done with a smaller case but you'd have to (1) cover the ODAC in electrical tape to prevent shorts and (2) solder your battery terminals straight and very low. With the batteries touching the O2 board, you *might* have just barely enough clearance to fit the ODAC board, but again, it'd be touching the top case so you'd have to cover it thoroughly. I honestly wouldn't recommend this as the tight fit could damage that board. The batteries just take up too much space in a B2. In most cases, your terminals won't be soldered that neatly; in my current O2 that I built, the batteries themselves touch the top case and were a tight fit to slide the O2 board in, that's how tight the clearances are.
My recommendation? Get a B3-080 case. It's only a dollar or so more expensive from Allied Elec.
You don't mean where the O2 is also powered off of USB, right?
As mentioned above, just fitting the ODAC in is a matter of space. No reason you can't have both the 9V batteries and the ODAC in the same enclosure, especially if the enclosure is larger than the default one. It's just that most builders just usually put the ODAC in the space where the batteries would have been, out of convenience, when putting both ODAC and O2 in the same case.
Originally Posted by MrMateoHead /img/forum/go_quote.gif
The most current Xonar DX card has 2V out, and dedicated headphone amplification through the front out / Headphone out jack. My guess is that output impedance is probably 10 ohms, given that many good computer cards use TI chips. That is also probably about twice the output voltage typical in a computer. I could not find exact specs online.
I did a blind A/B of the ODAC/O2 v. the Magni/Modi at a meet and the results were really disappointing. The difference between the two was minute to my ears, if it exists at all.
I did a blind A/B of the ODAC/O2 v. the Magni/Modi at a meet and the results were really disappointing. The difference between the two was minute to my ears, if it exists at all.
Has anyone experienced the O2 + ODAC with the following headphones?
HD 650
HD 800
LCD 2
Hifiman He 500
I have a budget of $1000+ and plan on using the headphones for mainstream (billboard top 100) music and movies. I've been told that headphones play the biggest part in influencing sound quality, thus I'm inclined to allocate more of my budget towards headphones. Also, i might or might not have the luxury of auditioning the above headphones with the O2 and ODAC before purchase. I'm open to suggestions for other headphones as well. Looking forward to hearing from those who have heard those phones with the O2!