Hi guys,

I'm finishing off another game, and for this one (my first game 100% in ASM) I'm using the PT3 player from Dionisio to play a simple track I made.

First I implemented the whole game, with sound fx. All working fine.

Then I added the PT3 player using hook 038h to play the music... and its working fine so far. I even created the music using only channels B and C, so it wouldn't conflict with the sound FX being played by my program at channel A...

The problem is, the player is somehow affecting the sound fx. I can hear some clicks from the FX, but somehow the music is overlapping them, I don't know why.

My sound fx routine just outputs data to ports A0h/A1h, almost like the sound command on Basic...

Does anyone have any help or advise they can give me?

Well... for now I was able to "fake" the sound fx, by disabling the player for short periods of time, playing the fx and re-enabling the player... not much what I planned, but better than no fx or no music

A standard sfx+pt3 replayer would be a big help for all developers.
With de MSXdev and de rediscovery of the PSG (thanks to the ZX scene) this would be a gaint step.

Let's hope everyone will share their knowledge/code.

Perhaps the XLS2 guys are willing to share their player?
They released the sources for the 'pletter' compressor. Maybe they are willing to share their implementation?

Looking forward to play it, Slotman!

This would be my next thing to look into
Having PT3 work with SEE, and vice versa.

...then an SEE update is prolly needed too.. darn.....

As far as I can see in the source the PT3 player writes to all PSG registers (see the "ROUT" routines). So it will overwrite your sound FX outs. I think you will have to modify the ROUT routine to fix this issue.

I'm thinking of a shared PSG buffer with status/prio. Instead of writing data to PSG, both PT3 and SEE will write the buffer. a separate routine will out all PSG data at once. Something like that, should not be to difficult... we'll see...eh see (damnit)

ps. where to get the sources.... (I'm lazy, u should know by know )

The soruces are here:
http://www.msx.org/modules.php?op=modload&name=Downloads&file=index&req=visit&lid=597

And yes, right, you should be able to use the PSG register buffer ("AYREGS" of the player to write FX sound for channel A! So you don't need own out routines and will have an optimal solution.

The fixed version is here.

Or just download the one from the MRC and insert:

OR %10000000
AND %10111111

right after:

CH_EXIT: LD HL,AYREGS+AR_Mixer
OR (HL)
RRCA


And yes, ro, that's the way it should be done, shared PSG buffer. Otherwise, you'll have to rewrite the replayer in order not to waste time in calculating music data that won't be played because of the SFX.

thanx guys...

@ MRC: couldn't that "fixed" version be uploaded to MRC?

mm, never mind MRC. The original source contains comments etc and is better to read. But the bit set should not be ignored as Dioniso wrote..

Sure! Send us a correct and commented version and we'll replace it in the downloads db!