I was messing with the eq on the app while it was in usb dac mode. Apparently, you're not supposed to do that. It powered off and became entirely unresponsive. I have to wait a few weeks until the battery completely died. After charging it again (completely unresponsive) I wiped it a reinstalled the software. I hope if this happens people own a windows computer because the file formats are incompatible with mac. I'm lucky I have a gaming rig. Also, there are no instructions on the internet or in the booklet on how to fix it. I just pressed random button combinations until my computer recognized it. It's really just shooting in the dark because I plugged it into several other machines and none of them recognized it.