![]() In 4.0, the rear channels are actually coming out the output labeled "center/sub" on the StarTech box. I added a simple stereo amp and pair of passive bookshelf speakers for the rear surround channels, and use this with Kodi (version 20) set to use a 4.0 speaker configuration. Play up to any resolution and sample rate that the DAC. -38,7 37,7 sources="usb_device output,usb_multi output"/> High quality media player supporting USB audio DACs and HiRes audio chips found in the latest phones. The 3.5mm jack, as well as Bluetooth, do not support more than 2 channels either (although enhanced aptX (Bluetooth) does support 5.1 surround sound, its not yet supported by Android). Your Android device supplies enough power to the USB audio. /tmp/usb1.xml 09:18:15.012439753 -21,6 15,11 In stock Android, its not possible to have more than two audio channels (stereo) via USB as documented here. Your Android device supports USB host mode Your USB audio interface is USB audio class compliant. Note that you'd need root access to make these changes on your box. USB audio to Toslink to my living room receiver. ![]() (As shipped, the config only supported stereo.) I basically copied some info from the HDMI policy. I got the streamer working with my pc using the provided driver and firmware. When done, the driver files are downloaded into the androidsdk \extras\google\usbdriver\ directory. enable all kernel features needed: USB host mode, USB audio, isochronous transfer mode see Android Kernel Configuration. enable generic USB host support at the framework level via the .xml feature flag. Windows 10 and Apple macOS version 10.6.4 an. In order to support USB digital audio, device OEMs and SoC vendors should: design hardware to support USB host mode. The SDK Manager with the Google USB Driver selected. USB AUDIO DRIVER SUPPORT The XMOS USB Audio firmware supports both USB Audio Class 1.0 and USB Audio Class 2.0. I used the docs from and edited /vendor/etc/usb_audio_policy_configuration.xml to add a multi-channel output to the config. Get it from the Android SDK Manager as follows: In Android Studio, click Tools > SDK Manager. I don't know what possibilities were available back in 2016 when this question was first posted, but today I managed to get multi-channel audio working on my Android 12 TvOS tvbox with a USB 7.1 channel external soundcard.
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