, thanks for the offer; but I'll use basic PSG for now.
we did it for our msxdev'11 entry
So you have a release date for the game now 
I'm really looking forward to it
I made my own version of the ayFX replayer for asMSX syntax with some extras like sound priorities.
I will publish it on my blog as soon as I have time to... 
Dynamic SFX allocation & priorities, cool!. Nice additions!
I'm not sure if I've faced this issue before. I remember that while I was developing CoT I was used to hear the main track with an exact frequency, mostly the one I can hear using the AY emulator (which sounds good to me). In one of the replayer routine changes I made, the song slightly changed its frequency and started to sound totally out of tune. This turns out being the notes table used by default, selecting another table from the ones provided by the distribution corrected the problem. Since then and using this frequency table I've tested several songs and all of them sounds fine to my ears.
Btw, all of my tests have been done with PT2, not with PT3; but they're basicallly the same...
I really thought that I was bringing up an important issue.
Something which could pose a problem to (future) developers.
As the frequency-issue bothered me increasingly,
somewhere along the line I started wondering whether some people were deaf or I was insane.
Turns out, there's nothing wrong with the PT3 player.
...So, what was it?
Well, this lesson I had to learn the hard way;
"Developers, and musicians in general-
Don't you E.V.E.R. use NLMSX for developing."
If you need me, I'll be under that rock over there.
no, wait, the conclusion is different.
Developing on MSX, you need to use more than one emulator, as none of them is perfect.
Thus if you face strange problems in development, it is a good rule to test the code on other emulators (or the real thing) before committing suicide