DON'T BOTHER GETTING A DodGyTEC.
I bought the hd8040 yesterday. All the channels work fine except for the aspect ratio. I've got an old 4:3 tv and it's all squashed up. Pressing the aspect ratio button does jack all. Went to the DGTEC website hoping to see if there was a firmware upgrade - the product wasn't even listed on the website.
The thing that fatal was talking about the audio carrying over to the next channel only happens when the signal is bad - I noticed channel 2 was lagging a bit so switched channels and the audio stayed on channel 2 for quite a few seconds.
Also with SBS the reception has never been that good at my house. This box had an annoying "Bad Signal" thing stuck in the picture which I couldn't figure out how to turn off!
Luckily I bought it from DSE I'll see if I can get a refund tomorrow and go and buy a real digital tv.
Oh no! I ordered the same model via DSE online a few weeks ago and it finally arrived today. Everything seems fine, except I've a CRT too, and so the image is also squashed up. I pressed aspect ratio and nothing happens! Exactly as you reported. It's like it only outputs 16:9 regardless. It does it all channels I think.
The only thing I could do to improve things was switch my TV to the 16:9 letterbox style. So that at least it wasn't squashed up. But that is sub-optimal, as I prefer to watch in 4:3 rather than lose all the screenspace.
A cheap old Hotchip STB that I had on loan from a mate has all the same specs and behaves the same, except its picture size button actually works.
This is very disappointing. The whole STB experience has been regrettable. I did a lot of research, finally made a decision, went to the shop to find they'd sold out. So repeated the exercise and came up with the HD8040, ordered it, had to wait ages, and now it's a dud. And almost okay - I could just live with 16:9 from the STB and set on my TV. Not sure what I'm going to do yet.