I would suggest formatting a new/different SD card and installing the latest version of Rasbian.I would also suggest using the Pi as you have been, but without the DAC plugged in. To see if that DAC could be causing issues.Are you installing any additional software on the device? If you are, maybe trying using the Pi without the software installed to see if you can identify what is causing the crashes.What happens when it does crash? Does it just hang/freeze or does it shutdown? ShowBox VidMate Mobdro
Reboot?