all I can say about the dingoo is that i've played Mega Man 2 on it while listening to Physicist on the same device. that's pretty rad.
The one thing I didn't get much insight into was what games/systems could or couldn't be played with sound. It seems a lot of things (particularly the more intensive stuff) get real laggy with BGM on. So I'm pretty surprised to hear you can emulate whilst listening to music, didn't know you could do that
