Audio No Longer Working on USB Output

Hi,
I've been using Audirvana, Bit Perfect, and other music software applications with iTunes.
Last night I unhooked the power cord and the music stopped playing. I've tried everything and anything to fix this but I am no longer getting audio out from my USB port (I've tried both ports).
When I go into Audo MIDI Setup I see my bridge (Musical Fidelity USB -> SPDIF Converter) as always. However, when I select it and "Use This Device for Sound Output" nothing happens and it doesn't change (it stays on either Airplay or Built-in Output).
In addition, I am unable to change anything on the USB Output (Master Volume, Analog 1, Analog 2...the only thing I an do is 'mute' which I don't want to do).
When I look at my Musical Fidelity Bridge and DAC it *appears* that they are getting signals - they both say 'Locked' when a signal is present.
I wonder if it's because the volume on my USB output is so low and I can't change it? See picture.
Please help! The only reason I have this MacBook Pro is to play music through my system.

Open the Speech pane of System Preferences and check whether either the listening key or the speech key has become set to that keystroke; if so, change the setting.
(60747)

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Hi,
As there is more than 1 IDT entry in Recovery Manager, cancel this and use the following method instead.
Download the IDT Audio installer on the link below and save it to your Downloads folder.
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When complete, restart the notebook and let Windows fully load. Open your Downloads folder, right click on the IDT installer and select 'Run as Administrator' to start the installation. When this has completed, restart the notebook again.
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Link to picture
Moderator note; picture(s) totalling >50K converted to link(s) Forum Rules
Solved!
Go to Solution.

As an update for anyone else experiencing this problem...
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Link to picture
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