SPC player from bsnes

SmartOne · Post by **SmartOne** » Wed Sep 03, 2008 2:47 am

Anyone know anything about the scratchy sound?

franpa · Post by **franpa** » Wed Sep 03, 2008 4:04 am

http://forums.winamp.com/showthread.php ... did=202525
Heres a working archiver plugin for RAR files...

http://www.winamp.com/plugins/details/24989 doesn't seem to work... or I fail at command lines

I would love this one more then the above because you can specify RSN extensions.

I notice scratchiness on the "edge" of the sounds on some instruments in MGME (like in SNESamp.) Is that what SNES is supposed to sound like? At the beginning of the song Cotton Island from the game Plok! (everyone should have this set,) the scratchiness is easy to hear.

You mean, "crackle" right?

blargg · Post by **blargg** » Wed Sep 03, 2008 4:28 am

Playing plok-12.spc from the soundtrack on snesmusic.org with SNES hardware has some slight static at the beginning:
plok_12_on_hw.mp3
It sounds the same in my SPC-700 emulator, with both the accurate and fast DSP versions. I'd guess it's caused by non-smooth volume envelope changes, like the ones audible in the two quieter Maridia tracks from Super Metroid.

SmartOne · Post by **SmartOne** » Thu Sep 04, 2008 12:50 am

Thanks to both of you!

I'm using XMPlay for MGME with its native RAR support, though. You can force it to open RSNs.

I'm assuming the volume envelope thing is SNES accurate?

blargg · Post by **blargg** » Thu Sep 04, 2008 2:29 am

SmartOne wrote:I'm assuming the volume envelope thing is SNES accurate?

I don't follow. The recording I posted above is that SPC playing on a Super NES console. Since the clicks are audible, either that's accurate, or Nintendo sold me a SNES that's not accurate.

SmartOne · Post by **SmartOne** » Thu Sep 04, 2008 2:48 am

blargg wrote:I don't follow. The recording I posted above is that SPC playing on a Super NES console. Since the clicks are audible, either that's accurate, or Nintendo sold me a SNES that's not accurate.

Numerically. Technically. You know?

I'm talking about the emulator bsnes, and/or MGME.

blargg · Post by **blargg** » Thu Sep 04, 2008 4:13 am

bsnes uses my accurate DSP emulator, which has been tested a bunch to behave exactly the same even in very obscure ways. MGME probably uses the 3x faster version of the DSP, which is only slightly less accurate in some obscure ways; volume envelopes are emulated the same on both.

mudlord · Post by **mudlord** » Thu Sep 04, 2008 4:33 am

I used the code from your GME patch.

Not sure what version of the DSP you used in that though...

blargg · Post by **blargg** » Thu Sep 04, 2008 6:50 am

The comment at the top of Spc_Dsp.h tells which it is. It's probably the fast version. To switch versions, just swap out the Spc_Dsp.h and Spc_Dsp.cpp files. Personally I don't think the accurate one is worth 3x the processor usage, but I don't have a modern GHz machine.

franpa · Post by **franpa** » Thu Sep 04, 2008 6:51 am

http://www.winamp.com/plugins/details/24989

How do you setup the command line parameters for the latest WinRAR beta?

mudlord · Post by **mudlord** » Thu Sep 04, 2008 7:08 am

The comment at the top of Spc_Dsp.h tells which it is. It's probably the fast version. To switch versions, just swap out the Spc_Dsp.h and Spc_Dsp.cpp files. Personally I don't think the accurate one is worth 3x the processor usage, but I don't have a modern GHz machine.

k, just checked..

I'm using your fast version.

mudlord · Post by **mudlord** » Sat Sep 06, 2008 9:34 am

Sorry for taking so long.

Currently, I am in the middle of writing a SNES audio plugin for Winamp/XMPlay as I type this, that strictly uses blargg's emu only, which in turn, is what byuu uses. Since both versions (blargg's and byuu's), give exactly the same output, I figured this will be okay. I will be using blargg's "accurate" DSP emu, not the "fast" version if people want to do listening tests. The plugin is pretty basic though.

EDIT: Okay, here:

franpa · Post by **franpa** » Sat Sep 06, 2008 10:26 am

This is irrelevent to MGME, correct mudlord?

EDIT: rename in_mgme.dll to in_zmgme.dll to make it load last so that SPC's are played with in_spc.

mudlord · Post by **mudlord** » Sat Sep 06, 2008 10:29 am

Well, the file I attached is the exact same emu which is used in BSNES. in_mgme uses blargg's Game_Music_Emu library, with his snes_spc patches.

The plugin I attached uses snes_spc only. Nothing else. It is made for any listening tests between SNESAmp and BSNES's audio core.

franpa · Post by **franpa** » Sat Sep 06, 2008 10:30 am

Yep, I updated my post above with instructions for using your in_spc without needing to remove in_mgme.

blargg · Post by **blargg** » Sat Sep 06, 2008 11:50 am

You can copy the accurate Spc_Dsp.h and Spc_Dsp.cpp files into your MGME plugin source, recompile, and get fully accurate DSP emulation in GME. Shouldn't be any need to create a separate plugin. But now that you have, I'm sure some audiophiles will swear it sounds different. Now you'll have to support this separate plugin

mudlord · Post by **mudlord** » Sat Sep 06, 2008 1:12 pm

You can copy the accurate Spc_Dsp.h and Spc_Dsp.cpp files into your MGME plugin source, recompile, and get fully accurate DSP emulation in GME. Shouldn't be any need to create a separate plugin.

I know

, I just felt the need for something to help with listening tests. And plus, I like plugins that are minimalist.

Hence why I coded it.

VideoGameScrapBook · Post by **VideoGameScrapBook** » Sat Sep 06, 2008 9:15 pm

I'm looking forward to your plugin! I'm currently releasing a series of albums that feature all of the original versions of the songs that were rearranged from Brawl, and I'm interested in exporting the audio in the most accurate way possible. Since you guys probably know your stuff when it comes to accurate audio emulation, I have a few questions that I've had a difficult time finding answers for:

1. In what ways is bsnes audio more accurate than what's produced by SNESamp? What are some noticeable differences that you get with a cycle accurate core?
2. What is the most accurate NES plugin, and how exactly is it more accurate than NotSo Fatso (mono, all filters disabled)?
3. What sample rate and resolution would you recommend for exported NES audio?
4. I assume a MAME gameplay sound dump will suffice, but do you know of an emulated sound format for the hardware used by Donkey Kong Arcade?

blargg · Post by **blargg** » Sat Sep 06, 2008 10:40 pm

VideoGameScrapBook wrote:In what ways is bsnes audio more accurate than what's produced by SNESamp? What are some noticeable differences that you get with a cycle accurate core?

I don't think anyone knows how it compares. I don't think anyone's run my thorough DSP test suite on it yet. I doubt anyone could tell the difference, except for a few cases where some obscure inaccuracy is exposed. An accurate player will click in Donkey Kong Country - Fear Factory about 41 seconds in, and Cave Dweller Concert around 71 seconds in (1:11) on the right side. The opening monster scream on Chrono Trigger - Last Battle also sounds slightly off if the pitch modulation isn't emulated exactly (you'll have to compare with an accurate player to hear the difference). Those are about the only noticeable differences between my accurate and fast DSPs, but there's no limit to how inaccurate an emulator can be.

SmartOne · Post by **SmartOne** » Sat Sep 06, 2008 10:43 pm

mudlord wrote:

Is it just me, or does that link not work?

I like the idea of a simple and accurate SPC plugin, though. Thanks! No GME = no extra filtering, right?

franpa · Post by **franpa** » Sun Sep 07, 2008 2:08 am

yep, that site seems to no longer be up due to technical issue's. GME never did any "filtering". it just used some additional changes to the spu core that are not present in BSNES.

SmartOne · Post by **SmartOne** » Sun Sep 07, 2008 2:17 am

Would you mind uploading your copy somewhere?

I looked around on mudlord's site earlier today. Now the site is terminated.

franpa · Post by **franpa** » Sun Sep 07, 2008 2:47 am

http://www.mediafire.com/file/gctz9zv2abu/in_spc.dll

SmartOne · Post by **SmartOne** » Sun Sep 07, 2008 3:20 am

Thanks much!

It would be extremely nice if in_spc supported track names.
Seeking would be great too.

franpa · Post by **franpa** » Sun Sep 07, 2008 3:40 am

This is probably a Winamp bug but... A played file will show the file name, viewing the File Information (and ok'ing the message) will make it show the full path and file name :O