If you want the USB audio enabled via official firmware/kernel, please vote (i.e. request to Google) here:
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About USB audio
A digital audio system is composed of:
. A storage module: Music is stored in file as a series of bits 0 & 1 with different encoding formats (MP3, WAV, FLACÖ).
. A player: The player decodes the bits 0 & 1 to PCM digital audio signals.
. A DAC (Digital to Analog Converter): The DAC converts the PCM digital audio signals to the original analog audio signals.
. An amplifier: The amplifier amplifies the analog audio signals.
. A speaker: The speaker restitutes the music.
Like a PC or a Mac, a Galaxy Nexus is a digital audio system.
Hopefully, the Galaxy Nexus, running on a kernel with a USB audio driver, can output the PCM digital audio stream to an external standard USB DAC & amplifier & headphone, much more efficient than the internal DAC & amplifier & speakerphone.
I was hoping to use my G930 headset when I found out usb storage, mouse and keyboard all worked. It was a little of a let down when I couldn't get audio out. Interestingly enough it picks up that the headset is there and it lets me control the volume through the wireless. Anyways I just starred it as well. Anyone know of a possible rooted work around? It seems this may be a bit of a stretch to hope for. =/
About external USB DAC: A higher dimensions music!
Impressions of a guy upgrading his PC rig
PC > PC sound card Creative XFI Xtreme Music (i.e. not a stock PC card!) > headphone Audio-Technica ATH-AD700
PC > USB DAC/amp FiiO E17 > headphone Audio- Technica ATH-AD700:
"Anyway, I got on to a lot of forums and found HeadFi (Yes, say goodbye to your wallet!). Never fully understood the world of Dac's and Amp's I started my research!
I searched the forum's and felt there was a few people in the same position as me who were feeling unsure about an alternative to PC sound card's, so I decide to the plunge!
Yes I could have grabbed an Asus ST/STX or Creative Tit HD but I wanted to go a different direction, so I went with the FiiO E17.
Conclusion: Done the whole unboxing and setup that everyone has probably seen, plugged her in to the computer and ran it through her paces!
I listen to various music from Classical, Rock, Pop, electronic, using mainly FLAC files.
Sound quality compared to the Xtreme Music was overall a big improvement!
The sound was full and warm! I immediately felt like I was listening to (what I describe as) a high end Hifi system!
It's very reassuring as I come from a Creative product to something totally different as in the Fiio and be in awe about what I'm hearing.
The FiiO sounds like a professional athlete compared to say an amateur running a marathon, well paced full of energy and doing what it loves doing, where as the Creative was more like a weekend warrior!"
For the time being, the standard USB devices for USB host-capable Android devices are only USB hubs, USB mass storage devices and USB class for human interface devices (for example, mice and keyboards).
I think we have to lobby for imposing USB DAC as a standard Android USB device, like a standard USB device for every Mac or PC (i.e. we donít have to request each individual PC manufacturer to add the USB audio capability).
Google should include USB host (and USB audio) on every new Google "Nexus" device, which is supposed to be a reference Android device for others.
The 1st out-of-the-box (i.e. without modding) Android device able to support USB audio is the Android 4.0 powered Archos G9.
The Google issue "Enable USB audio", requesting Google to standardize USB audio on Android smartphones/tablets, is currently ranked 21 of 18,868.
It is ranked in top 3 of less than one-year-old requests.
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