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Schiit Happened: The Story of the World's Most Improbable Start-Up - Page 50

post #736 of 1818

Ehhh... Some puns are more witty and tasteful than others.

post #737 of 1818
Quote:
Originally Posted by UmustBKidn View Post

Everyone knows what a USB port is (including my son that likes to think he knows more than me, to my ex wife who really doesn't know much of anything), and most people (even non technical types) know that you plug things into your computer using USB ports. All of those lovely technical explanations aside, that's all they really need to know.
Yeah, it's something about it being a Universal Serial Bus or something...

biggrin.gif

I think the other big takeaway from the chapter is to have better USB audio standards, and for ALL software developers to support it. USB 3.0 can support speeds up to 5 Gb/s, which is blazingly fast as far as digital audio is concerned. It shouldn't be that hard to eliminate most of the issues we currently have with audio over USB.
post #738 of 1818
Thread Starter 
Quote:
Originally Posted by superjawes View Post


Yeah, it's something about it being a Universal Serial Bus or something...

biggrin.gif

I think the other big takeaway from the chapter is to have better USB audio standards, and for ALL software developers to support it. USB 3.0 can support speeds up to 5 Gb/s, which is blazingly fast as far as digital audio is concerned. It shouldn't be that hard to eliminate most of the issues we currently have with audio over USB.

 

Actually, speed isn't the problem. USB3.0 is needed for audio about as much as 64/1544 music is needed for great sound. And if you saw the PCB layout guides for a USB3 receiver, you wouldn't be asking for it in audio.

 

The vast majority of problems with audio over USB come about from:

 

1. Power-saving measures such as Windows' port power management and Mavericks' App Nap. Holy crap, do we really need this standards-destroying, arbitrary crap to save another minute or two of battery life? And it's not just USB DACs that are affected. Google "Windows USB Port Power Management" for more info. If the manufacturers simply made this draconian crap completely and easily defeatable, we'd have a lot less problems.

 

2. Audiophile cables. Many do not support USB 2.0 speeds. If it's hand-made, watch out.

 

3. Long cables. Cables over 3m are getting a bit iffy for audio streaming.

 

4. Crap cables. There are a lot of crappy $0.15 USB cables out there that got thrown in with a printer or whatever, and have been swapped from system to system over the years. They don't work so well, either.

 

5. USB port types. USB 3 ports aren't a problem with USB 2 DACs--except in a few cases: Some don't even provide full power to the USB port anymore. Some are broken (yes), and some are on controllers that are conflicting with the 18 hard drives, 3 other USB ports, and 53 other peripherals in your super-tweaked system. 

 

And that's the rant for today. We return you to your regularly scheduled programming...

post #739 of 1818
Quote:
Originally Posted by Jason Stoddard View Post
 

 

1. Power-saving measures such as Windows' port power management and Mavericks' App Nap. Holy crap, do we really need this standards-destroying, arbitrary crap to save another minute or two of battery life? And it's not just USB DACs that are affected. Google "Windows USB Port Power Management" for more info. If the manufacturers simply made this draconian crap completely and easily defeatable, we'd have a lot less problems.

 

 One way to avoid the power issue is to get a self-powered USB hub or other device.  I just added an iFi USB Power (http://www.ifi-audio.com/en/iusb.html) to my system which, while pricey, completely powers any USB DAC plugged into it as well as offering signal filtering.  I haven't noticed any real sound quality difference, but it makes me feel warm and fuzzy knowing it's there and that I know the output is fully powered separately from the computer.  :)

post #740 of 1818
Back when I was doing tech support for Apple, we had to help Windows users disable the USB port power management all day long; so their iPods/iPhones could sync. It is the biggest pain in the butt!

It's one of the main reasons Apple finally did wifi syncing.
post #741 of 1818

Sorry to ask, but are you preparing some portable schiit for us?? I will like to get some schiit!!

post #742 of 1818

Is there a USB port power management in a macbook pro???

post #743 of 1818
Quote:
Originally Posted by freddy1201 View Post

Is there a USB port power management in a macbook pro???
Wanted to ask the same question for the MacBook Air
post #744 of 1818
Quote:
Originally Posted by Jason Stoddard View Post
 

3. Long cables. Cables over 3m are getting a bit iffy for audio streaming.

 

 

The funny thing for me is, my 5m uber Oyaide cable seems to have less issues than all the other USB cables I have with high-res audio, even if it goes all the way around my desk past a crapload of other devices, power and other cables. This is one reason I want to own 'scope.

 

I think I might just chuck all my regular USB cables and buy a bunch of Belkin Gold ones.

 

Quote:
Originally Posted by Don Lehrer View Post
 

Sorry to ask, but are you preparing some portable schiit for us?? I will like to get some schiit!!

 

I want to see Mike's reaction when Jason suggests they make a DAP. I would fly over there just to see that.

post #745 of 1818
Quote:
Originally Posted by Currawong View Post



I want to see Mike's reaction when Jason suggests they make a DAP. I would fly over there just to see that.

Film at 11
popcorn.gif
post #746 of 1818
Quote:
Originally Posted by Jason Stoddard View Post

Actually, speed isn't the problem. USB3.0 is needed for audio about as much as 64/1544 music is needed for great sound. And if you saw the PCB layout guides for a USB3 receiver, you wouldn't be asking for it in audio.
Well I wasn't thinking about "speed" so much as "bandwidth". The effective "speed" of the music can stay the same, but I figure that a good communication protocol should be able to use the extra bandwith to compensate for the shortcomings.

But of course, I say "should" because I don't have any experience on this front, I'm not writing the standards, and I'm probably a bit too much of an idealist. (I mean if we were able to put a man on the moon in 1969, surely we should be able to stream audio over USB without killing the quality, right?!)
post #747 of 1818
Quote:
Originally Posted by freddy1201 View Post
Is there a USB port power management in a macbook pro???

http://support.apple.com/kb/ht5394

http://www.tekrevue.com/tip/disable-app-nap-os-x-mavericks/


Edited by Esprit - 4/14/14 at 9:08am
post #748 of 1818
Thanks mate. That was very helpful.
post #749 of 1818
Quote:
Originally Posted by Currawong View Post
 

I want to see Mike's reaction when Jason suggests they make a DAP. I would fly over there just to see that.

 

Nah, I'm pretty sure you'd be able to hear the screams and profanities from here.

post #750 of 1818

I do not have Maverick, so i'm ok i guess??

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