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The same song keys on something up in the 0x7fxxxx range, so masking is definitely not happening. Or at least it's not in the AICA anyway.

ETA: Found it. The AM2 driver requires that unused words in the AICA address space return 0x0000. Anything else makes it screw up an address calculation.

1.4.6 with that fix is now up. It should play all the current rips decently. Applying similar fixes to MAME made Toy Fighter sound a lot better (it's DTPK too - I'd rip it myself if I knew where to get the driver image that the ripper wants).

RB, search for AM2/AICA, go *back* 0x20 bytes from beginning of the string and extract 0xf000 bytes or up to the 0x00 bytes end (it's usually smaller than that, co can 0xf000 can overflow into DTPK data). That should be the driver.

toyfight one:

bcut mpr-22033.ic9 aicadrv.bin 0x558f00 0xd000

Or you can grab am2drvext.py that I just put up on my site which basically does just that (although I extract 0x10000 bytes just to be on the safe side).

EDIT: Actually, it seems that the size of the driver is specified at 0x54 - no need to guess.

Perfect, that made a working rip the first try Does dsftime work with DTPK tracks? I get this error (using Python 2.5.1 on Linux, which works with all your other stuff fine):

dsftime.py handles only manatee.drv files (since it's keyed to interpret MSB files, not monitor read/writes on emulated memory, like other autotimers do), hence why all my DTPK rips are untimed too.

My Toy Fighter rip is now posted. I don't know if the plugin's been updated to 1.4.6 spec yet, but it should work fine once it has been. I also was able to rip a bunch of sound effects from the Naomi BIOS, some of which aren't playing in AOSDK for some reason. I'll investigate

Three new rips for today:

Dead or Alive 2 (Naomi)(1999)(Tecmo)
Sega Marine Fishing (Naomi)(1999)(Sega)
Virtua Fighter 4 (Naomi 2)(2001)(Sega)

I've also mirrored RB's Toy Fighter rip.

http://dsf.hcs64.com

Haven't checked any of those with AOSDK (been using Deunan's player for testing, since the plugins aren't updated yet).

Incidently, RB, if you want to add streamed Naomi sets to M1 (like the MP3 Model 3 ones), here's the relevant info.

ADX (lotsa rippers for this one, so you should be able to find the file offsets/player easily):

Melty Blood - Act Cadenza (take note, one ADX file is muxed into SFD stream)
Musapey no Choco Marker
Senko no Ronde

AM2 SPSD stream container:

Capcom Vs. SNK - Millennium Fight 2000 Pro
Capcom Vs. SNK 2 - Millionaire Fighting 2001
Guilty Gear XX #Reload (has one additional music more than normal XX)
Mobile Suit Gundam - Federation Vs. Zeon DX (didn't try the normal version, but I imagine it doesn't have more music than this one).

How to rip/play SPSD files:

SPSD magic at offset 0x00, 0x40 bytes of header, then Yamaha ADPCM data (all files I've seen have 2 channels with 0x2000 interleave).
Offset 0x0c in header stores # of samples in the file (DWORD, LE). Add header size to that and you have full SPSD filesize.
Offset 0x2a in header stores stream frequency (WORD, LE).

SPSD files are playable by a fairly recent VGMStream compile (say, from yesterday).

VF4's songs are built entirely out of loops (more like a MOD than normal sequencing) and it looks like the timer's a little slow in AOSDK because they don't quite match up. I'll massage it ;-) DOA2 and Marine Fishing sound fine.

ETA: fixed it, VF4's now seamless. I should've followed SCSP more closely on this one, it had it right ;-)

AOSDK 1.4.7 is posted with the tempo fixed so VF4 plays properly.