USB SQ, what can one expect


Have been trying out the USB connection on a Resolution Audio Cantata. The wire I've been using is generic (nothing fancy)and I've been using a Dell laptop using JRiver just to try this out. My problem is that my CD's played on the transport built into the Cantata just sound fantastic, three dimensional, everything and the same CD's ripped to the computer don't hold a candle to it played over the USB. I've also tried some high rez downloads. Is this to be expected or is the problem that I need to optimize the USB playback more. Thanks for any guidance that can be offered.
redcarerra
Cerrot, Try using the IFI USB power supply and IFI purifier/conditioner. It separates the power supply from the data, quite a remarkable little product.
I'm also using a Bryston BDP-2 for the player and now utilizing its USB output.
With the IFI unit, the USB is better than the SPIF outputs.
Rhanson, I have explained the shortcomings of USB many times over the past years. My postings do actually help as the entire world has embraced usb as if it is the only (and best) solution. It is not. FAR from it. I am pointing that out. I may be the only one pointing it out. You may be comfortable at opening up a PC but the rest of the PC audio world is not as comfortable, and has settled for the rediculous notion that USB is the way to go. (Many believe it is the ONLY way to go). I have nothing to defend. Science proves my position. Audio should not be transmitted in packets. pretty simple from where I sit. So, how do we get to a stream rather than packets??? THAT is the $64,000 question! and USB is NOT the answer.

Async USB is not a continuous stream, it is broken up due to handshaking. You have no concept of the science involved. Audio is a real-time process and requires isochronous connections.

Ethernet is explicitly packetized. I have Ethernet as well as USB interfaces and they both perform well. Ethernet can have drop-outs on the network due to its packetization and out-of order arrivals. I will argue that since Ethernet is not a particularly good medium for real-time that it is not well suited to audio, since it is a real-time process.

The main advantage of Ethernet has nothing to do with packetization. The advantage is that the computer OS treats the data no differently than other data. With USB and S/PDIF, the audio stack becomes involved which usually impacts sound quality and creates computer, app and OS dependence.

Steve N.
Empirical Audio
Cerrot: "I have nothing to defend. Science proves my position. Audio should not be transmitted in packets. pretty simple from where I sit."

Not to pick nits, sir, but you DO have something to defend: Your position, which is stated so clearly in the above quote. (I do have a tendency to notice conflicting or internally inconsistent statements.)

I understand you've evangelized against USB as an audio solution. Perhaps, as you say, you're the only one doing so. I would agree with that, as there seem to be so many USB-based solutions that I'm compelled to think that people aren't listening.

What I would suggest, however, is, "So what?"

Maybe it's not the *best* approach, but I and perhaps others would suggest to you that the sound is pretty darned good when approached properly. I couldn't give a rat's pitoot whether it's USB, or Ethernet, or sound card, or the next big thing to come along. I'm more than delighted with my sound, and there is a general feeling that, USB limitations notwithstanding, digital playback is approaching or has approached the vaunted vinyl, and only stands to get better as time goes on.

Most people say "YMMV." Perhaps USB is not for you, and that's cool. Don't use it, then. But throwing such a huge (and wet) blanket over anything-USB is to denigrate peoples' chosen systems, and to diminish the work and accomplishments of system designers who -- despite the limitations of USB -- have developed equipment that produces world-class audio.

My position is that since people are getting excellent results from USB, then perhaps it's not such a bad thing after all. For now, I'll run with it.
Dude, I agree with you. I wouldn't care if the best sound came out of a dixie cup with a piece of dental floss. No issue. Jeezzz.... BUT, dont be ignorant about it either. I trid the dixie cup with the piece of string. Im not sitting here saying usb is inferior by never hearing it. I was probably one ofthe first on the planet to hear sound out of that little hole. TRY a native spdif iplementation ...and then talk to me.