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In Reply to: RE: Seeking Help With Late 2014 Mac Mini USB Hi-Speed Bus posted by AbeCollins on January 27, 2015 at 08:09:26
Abe- First I would thank you very much for replying to my post. I regularly read your posts here on the forum and I value your opinion very highly.
"Wow! You have a ton of 'stuff' on your USB ports. Have you tried disconnecting some of the items or disabling them before connecting your SOtM DX USB-S/PDIF converter? Why do you have a USB Logitech keyboard, a USB Apple Keyboard, USB Optical mouse?"
Yes, I realize that I do have a ton of 'stuff' connected I prefer the lighted Logitech keyboard listed for everyday use and keep the Apple keyboard connected in case I need it for it's unique features. I have disconnected all of the peripherals (most of which are on the external USB 3.0 hub) with the exception of the Kingston 3.0 USB flash drive which runs on the USB 3.0 SuperSpeed Bus and re-connected them one by one in every possible order into each of the remaining 3 USB ports without activating an additional USB 3.0 Hi-Speed Bus.
The work around that I am now using in an effort to try to isolate the SOtM DX on the single USB 3.0 Hi-Speed Bus is that I have connected all of these devices along with the USB 1.1 Musical Fidelity V-Link to the USB 3.0 external hub thus leaving only the wired mouse and the SOtM DX on the USB 3.0 Hi-Speed Bus along with the IR Receiver and Bluetooth Hub (which are disabled) while the external hub is switched off.
"In fact, the SOtM DX USB-S/PDIF does not even have to be on a separate USB 2.0 bus if the other devices on the bus are dormant."
I take it that this means I could skip the work around and leave the external hub on with all of the connected devices idle while running only the SOtM DX and the wireless mouse on the USB 3.0 Hi-Speed Bus along with the IR Receiver and Bluetooth Hub which are disabled and that the SOtM DX would be considered isolated when the wireless mouse was not in use?
Follow Ups:
Obviously it's a lot harder to achieve what you're trying to do with so many USB devices connected.
Have you ever been able to get the SOtM DX to connect to a USB 3.0 controller/hub, possibly with no other USB devices attached? I'm not sure that it will connect to USB 3.0.
While not ideal, you CAN have your SOtM DX connected to USB 2.0 with other USB 2.0 devices on the same controller/hub. If the other devices are not actively in use while playing music the chance of conflict are pretty slim.
Abe- Thanks again for your help in this matter. Under any conditions the battery powered SOtM DX will only connect to what is shown as the USB 3.0 Hi-Speed Hub which appears to be a different term for what I have known as a USB 2.0 Hi-Speed Hub.
Thank you for your advice that "If the other devices are not actively in use while playing music the chance of conflict are pretty slim." I did discover though that moving the 128GB Kingston HyperX USB 3.0 flash drive from the USB 3.0 Hi-Speed Bus to the USB 3.0 SuperSpeed Bus made a profound improvement in sound quality probably because as you put it the flash drive was in conflict while the SOtM DX was in use.
I would like to say that from recent listening experience my personal opinion is that the new late 2014 Mac Mini runs very much quieter and sounds worlds better than either of the Windows 7 desktop or Windows Vista laptop computers that I own ever did. Thank you for helping me to hopefully get the Mac Mini to sound even better as the digital front end in my audio system.
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