USB audio out not getting to DAC

Just set up my Macbook late 2007 OS 10.7.5 to a Denon DA-300USB DAC.
I'm successfully playing files out of JRiver Media Center software via Mac's digital audio out through an optical audio cable. But optical audio has limitations on bitrate, only to 24-bit/96khz.
I want to use higher rates and have some higher res files. The DA-300USB can process up to 24/192 and DSD files using USB.
When I connect the DAC using USB and power on the DAC, the sound preference pane adds the option "Audio Out High Speed USB," which is what I select. This indicates the computer is seeing the DAC.
But when I play a file, the DAC display reads "unlock," meaning it's not receiving audio. And the sound plays through the internal speakers, Ugh!
Denon says no driver is needed for this device -- indeed the computer does detect a USB audio connection when the DAC is on.
Is there something I'm missing?

According to Crutchfield, this DAC can only process ALAC up to 96 kHz. Can you get lower res files to play using the USB connection?

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USB Audio source not getting to the speakers

I have a turntable audio source connected to my MacBook Pro with Mavericks OS. The device shows up on the Sound pane in System Preferences in the input screen as USB Audio CODEC and the input level bar graph moves when I try to play a record on it. The output screen is set to Internal Speakers, volume is turned up and the mute is off. In other words all the obvious stuff is done.
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I found the solution in another discussion. The audio program Audacity did the trick.
One needs to have a client like this to process the USB input.
Works great.
Thanks for looking.
Ted

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I know of no device that has OTG "Built in".. so with that said...Micro USB headphones are in more of a testing phase, and only supported by a select few phones/tablets. The device itself has to be "usb headphone aware" because normaly none of these devices default to host mode (ie none of them react to usb connections in the same way a PC/laptop does).
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Problem Solved!
It turned out to be a combination of the usb cable and the OTG USB hub. On my desktop the iBaso was cable specific as to the device being recognized. When I tried the working cable witht the OTG hub on the Stream 7 it failed as usual. But when I tried the cheap monoprice adapter it worked.
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I have no problems with the audio out (the jack on the back) on my Mac Pro, though I'm not using a high-end stereo and I'm in an office environment so I may not hear subtle noise. If you haven't tried a different cable, you might try that. If your stereo supports it, you can also try the optical output.
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I just posted this problem I had also. The USB audio Codec is for PPC macs only. I couldnt get a PYLE USB cassette deck to work in AUDACITY because it needed that codec.Windows users use this codec for many devices including the one you are trying to connect.
My post in Snow leopard forum:
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In Audacity prefs, I selected:
"USB Audio CODEC" for both Input and playback.
I even tried lower sample rates and such. Record button stays grey and readouts don't show any input whatsoever even though I am sending a signal.
Mac is a 533Ghz g4 (Digitial audio) running 10.4.11
It is plug into a USB port on back of machine.

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Hello faith67baillie,
Welcome to the HP Forums!
I understand there is no sound from CDs or your Music folder. I will do my best to help! First, I require the following information, and clarification of the issue:
1. The computer's model number. If you require assistance locating this information, please reference this website: Guide to finding your product number
2. The computer's operating system. If you require assistance locating this information, please reference this website to determine your Windows operating system.
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Mario
I worked on behalf of HP.

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USB audio out not getting to DAC

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