but your mac isn't what's producing the sound in this case.  The question isn't 
does your mac have optical, at which, the answer is no, by the way.  The 
question is, does your USB interface have optical out?

I do agree that would give you a better sound.  Either that, or SPDIF, 
sometimes pronounced spiddif.

I still however tend to think this is a bigger issue than your speaker setup.  
It sounds more like there is something going on within the USB connection from 
your mac to the USB interface.  I don't think your speakers are the problem 
here, honestly, based on what you're telling us.

Chris.

  ----- Original Message ----- 
  From: Bill Holton 
  To: macvisionaries@googlegroups.com 
  Sent: Wednesday, January 20, 2016 8:02 AM
  Subject: Re: Need a bit of USB sound education


  I was told my mac mini didn't have an optical out. Is it the same jack that 
you would normally take audio out of?

  Sent from my iPhone

  On Jan 19, 2016, at 11:43 PM, 'Chris Blouch' via MacVisionaries 
<macvisionaries@googlegroups.com> wrote:


    If you are trying to get 5.1 out of your Mac, does your amp have an optical 
input? If so, it might be easier to skip all the USB stuff and just run optical 
from the mini to your surround-sound amp.

    CB


    On 1/18/16 9:57 PM, Bill Holton wrote:

      Hi.

      My wife says they are green, orange—red?—and black.  The USB cable goes 
into the box, those three cables go to my 5.1 system subwoofer, the subwoofer 
has the amp, I am guessing, and there are five audio cable jacks in it that 
lead to the left, right, satellite, and center channels.  The speakers also 
have a large cable with a volume know, a headphone jack, and dial for 
bass/treble, and another that does increased separation.  Does that help?

      The USB audio keeps dropping out, then coming back.  I thought maybe it 
was an OS issue, but I am running VM, and after a config change it started 
asking me where I want the device connected, Mac or Windows, so I am guessing 
it is actually disconnecting and reconnecting.  Tried three different USB 
cables;, didn’t help.



      From: macvisionaries@googlegroups.com 
[mailto:macvisionaries@googlegroups.com] On Behalf Of Christopher-Mark Gilland
      Sent: Monday, January 18, 2016 6:50 PM
      To: macvisionaries@googlegroups.com
      Subject: Re: Need a bit of USB sound education



      OK, do you know what color those cables are?  That would tell me a fair 
amount.  Are they blue green and black?  If so, I might have a possible 
solution.  If two of them are red and white, then I'll have to think about it, 
as that wouldn't exactly tell me much.



      red and white is generally your standard RCA, then of course yellow would 
be for video, so I highly doubt that is what you're working with.



      The green, blue, and black would be digital and probably would be like a 
composit cable.



      That's why I'm kind a wonderring.  We need just a slight bit more info.



      Chris.



        ----- Original Message ----- 

        From: Bill Holton 

        To: macvisionaries@googlegroups.com 

        Sent: Monday, January 18, 2016 5:15 PM

        Subject: Need a bit of USB sound education



        Hi.

        I am currently running a USB sound adapter to a set of 5.1 speakers on 
my Mac Mini, connected by three color-coded cables to the subwoofer, which in 
turn connects to the five speakers.

        The device is acting up, it keeps failing and restarting.  Tried 
different cable, same issues.  I want to replace the device, but not sure what 
I am looking for.  All the ones I see on Amazon show audio out.  What do I need 
to look for in one that will connect via the three color coded cables?  Hoping 
to get off fairly inexpensively, so if anyone can recommend one…much thanks.

        Bill



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