[hatari-devel] MP2 player and demos are running well now in Hatari

[Eero Tamminen]

Hi,

On lauantai 29 tammikuu 2011, Laurent Sallafranque wrote:
> I'm really happy tonight.  ;) ;) ;) ;)
> I've finally managed to play correctly MP2 musics.
> 
> DMA_play -> DSP_Record is correctly synchronized in handshake mode.
> 
> I've tested with WinUae core, everything is perfect, sound is clear.
> I've also tested with the old core, music seems to be played too slowly
> (certainly because of the wrong 68030 cycles counting).

I tested with old core.


> I've tested the following demos and programs :
> 
> revert (Mikro)
> Amanita (DHS)

Sound is "scratchy".

> MP2 player

This is otherwise quite OK, but the sounds in most mp2 files like beams.mp2
is clearly a bit "scratchy".

> Don't break the oath (DHS)

Sound is "sratchy".

> Beam (Tscc)

At some point in the demo, I stop hearing any sounds.  Demo still
continues fine though and sound comes back at credits.  Sound isn't
"scratchy" like in others.


> They all work perfectly now.
>
> There's still the Wait demo from Toys which delivers no sound at all.

Verified.


> It may let run some other programs.
> 
> Many thanks to Tomas for his explanations of the 2bits shifting while
> transferring the data.
...
> PS : About sound, I still have the same problem : I launch hatari, then
> I run any program with sound. It sounds dirty. I quit the program (but
> not hatari) and launch it again (I haven't changed anything). It plays
> crystal clear.
> 
> Sometimes, it plays well immediately. Sometimes, I have to run the
> program twice times or more before having nice sound, but always in the
> same hatari cession.

The "scratchiness" in sound could be what you're describing here... :-)


	- Eero