[Android Stick & Console RockChip based Computers] Bob Smith42:
I added the USB sound card. Now I am able to use a microphone on the UG007 ii. Great.

The (semi) working device is Syba SD-CM-UAUD USB Stereo Audio Adapter, C-Media Chipset, RoHS The microphone input works, audio output not.

UPDATE: Finally got audio input and output working with this device. Basically, plug and play is not always a reliable method. Instead reboot with device connected and audio in & out works.

I also got another fancy USB sound card from Syba that does not work for input nor output. This one finally worked. This one did **not** work for me. I did little troubleshooting.

UPDATE: After further testing I found this device also works, but sometimes crashes on plug and play. When I reboot with device connected the audio in & out works, and subsequent plug and play works. Typical problems are caused by plug and play device with recorder application open or music player open, or switching devices with plug and play without rebooting.

So, with a microphone connected on the first, I decided to try VOIP programs again. After installing Groove IP, same as before it crashed when launched. However, Talkatone works. It is complicated to get it working. Here is what I did:

Installed Talkatone, In the settings it gives under the *Phone* tab, I selected Call Settings. I changed Start Call on "normal". It was set to "BlueTooth (when available)", but I could never get the microphone working, listening with bluetooth headset and microphone input to the USB sound card. Bluetooth was wierd because I was able to hear on the headset with setting "Bluetooth (when available)" but neither the bluetooth nor USB sound card microphone input worked. Bluetooth devices never show in the Android Sound settings.

Under Android Settings, Sound, Sound Devices Manager. With the above USB sound card connected the options are:

Talkatone working configuration:

Sound input devices: USB PnP Sound Device (***selected)

Sound output devices:

ROCKCHIP HDMI (***selected)

USB PnP Sound Device (not selected)

Note: I switched my audio OUT setting to HDMI and connected a speaker to the back of my HDMI monitor. You, like me, are probably now saying WTF. Yes? While the microphone is working on USB PnP Sound Device it seems the audio output does not work on either of my USB sound cards. However, with Talkatone setup Start Call on normal, the HDMI audio output works with the microphone input on USB PnP Sound Device. LOL

UPDATE: If you reboot with USB sound card connected you can use USB PnP Sound Device output. But, plug-n-play may kill your output until reboot with connected.

I run tests using Music player for audio output, and the Sound Recorder for input. The Sound Recorder application can be *found* on the stick computer in the /system/app folder. It is bundled with the device but I was unable to find a launch icon. Information on Sound Recorder is Version 4.1.1-eng.ant.20121212.085830 Once run, I can subsequently find & run again using search on "SoundRecorder". Also, in the Play market the Sound Recorder Shortcut by Kayan Nurav gives an icon as a fix to launch Sound Recorder.

Using these configurations I can successfully make Talkatone voice calls with the UG007 ii. My voice quality depends on microphone sensitivity. The sound out via HDMI to speakers sounds perfect.

There are still some annoyances. After reboot or re-plugging the USB sound card: if you want Rockchip HDMI output the Android settings need to be fixed (as shown above). I frequently test sound output using the music player and test input with sound recorder because of frequent sound input and/or output failures requiring me to reboot. Definitely a work in progress, yet interesting.

UPDATE: Finally got audio input and output working with these devices. Basically, plug and play is not a good method. Instead reboot with device connected and audio in & out works. I tested a third USB sound card where audio input/microphone does *not* ever work. If you find some, please post further examples of working USB soundcards in this thread.