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DOSBOX fork with better FM synthesis?

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First post, by Stiletto

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A passing comment from R. Belmont of MAMEdev team:

"also, (at least) one of the dosbox fork(s) apparently has FM that blows MAME's away ... but I forget where I saw it"

anyone? 😀

"I see a little silhouette-o of a man, Scaramouche, Scaramouche, will you
do the Fandango!" - Queen

Stiletto

Reply 2 of 65, by KainXVIII

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leileilol wrote:

The only recent more accurate FM emulator i know of is khokh2001's nuked opl3 fm and that hasn't been backported to dosbox AFAIK.

Interesting, does it have standalone installer (like Munt) or you need somehow compile it yourself?

Reply 3 of 65, by keenmaster486

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I've found "fast" OPL3 emulation to sound more like the original, that is, when you set all the frequencies to 49716 Hz.

I flermmed the plootash just like you asked.

Reply 5 of 65, by Stretch

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Must be this one
AUDIO - Nuked OPL3 Patch for DOSBox(+Windows build) (SDL1)

PC1: Win98SE - Via Apollo Pro Mobo - Pentium II 233 - 256 MB - Voodoo 3 1000 - Acoustic Edge PSC706
PC2: Win98SE - ASRock 775i65G R3.0 - Celeron 2.2 GHz - 2048 MB - Geforce FX5700 - Audigy 2 ZS

Reply 6 of 65, by Stiletto

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Stretch wrote:

R. Belmont made his comment _before_ that thread was posted. But that poster had made his emulator before he made his DOSBox patch. So I'm not really sure.

"I see a little silhouette-o of a man, Scaramouche, Scaramouche, will you
do the Fandango!" - Queen

Stiletto

Reply 8 of 65, by James-F

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They sound absolutely identical to me.
I'm not an expert but I've read that the OPL3 has only 8 basic waveforms to emulate, and I think dosbox does an excellent job.
How more accurate simple sinewave sawtooth or squarewave can be ??

Anyway, here are a quick comparison between Nuked OPL and Dosbox OPL:

Attachments

  • Filename
    Nuked 2.mp3
    File size
    842.04 KiB
    Downloads
    166 downloads
    File license
    Fair use/fair dealing exception
  • Filename
    Nuked 1.mp3
    File size
    844.08 KiB
    Downloads
    160 downloads
    File license
    Fair use/fair dealing exception
  • Filename
    Dosbox 2.mp3
    File size
    838.77 KiB
    Downloads
    139 downloads
    File license
    Fair use/fair dealing exception
  • Filename
    Dosbox 1.mp3
    File size
    840.81 KiB
    Downloads
    160 downloads
    File license
    Fair use/fair dealing exception


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Reply 9 of 65, by nukeykt

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Here's comparison between four opl3 emulators: Nuked OPL3, DOSBox fast OPL3, DOSBox compat OPL3, MAME/MESS OPL3. Unfortunately i can't record real OPL3. So I also uploaded original midi file: https://www.dropbox.com/s/4b8bir5gyy6q1aq/LION10.MID?dl=0

Attachments

  • Filename
    lion10-mameopl3.mp3
    File size
    2.13 MiB
    Downloads
    146 downloads
    File comment
    MAME/MESS OPL3
    File license
    Fair use/fair dealing exception
  • Filename
    lion10-dbcompat.mp3
    File size
    2.11 MiB
    Downloads
    137 downloads
    File comment
    DOSBox compat OPL3
    File license
    Fair use/fair dealing exception
  • Filename
    lion10-dbfast.mp3
    File size
    2.18 MiB
    Downloads
    133 downloads
    File comment
    DOSBox default,fast OPL3
    File license
    Fair use/fair dealing exception
  • Filename
    lion10-nukedopl3.mp3
    File size
    2.13 MiB
    Downloads
    165 downloads
    File comment
    Nuked OPL3
    File license
    Fair use/fair dealing exception

Reply 10 of 65, by James-F

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Interesting.

Dosbox-Fast sounds closer to Nuked-OPL, but has lower pitch "kick drum".
Dosbox-Compat is muddy and distorted.... are you sure you did not mix the names of Compat and Fast?
MAME is less distorted than Dosbox-Compat but still not as clean as Dosbox-Fast or Nuked.

What game is it from so I can record a real OPL-SA3 for comparison.


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Reply 11 of 65, by nukeykt

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No. This is case where compat loses to fast emu. This music is from Lion King port to Windows 95. BTW I just recorded sample from ymf718 myself.

Attachments

  • Filename
    lion10-ymf718.mp3
    File size
    2.11 MiB
    Downloads
    130 downloads
    File comment
    YMF718 OPL3.
    File license
    Fair use/fair dealing exception

Reply 12 of 65, by James-F

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A horrible recording (there is some strange effect), but pitch-wise Nuked sounds the closest.
Yet, Dosbox-Fast is not bad at all.

Any examples where dosbox-Fast is less accurate than Compat?
I've been under the impression that Compat is MORE accurate than Fast... where clearly it is not so in this example.


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Reply 13 of 65, by Scali

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James-F wrote:

A horrible recording

Using mp3 is not a good idea for this. Regular WAV or FLAC would be better for comparison.
Now you can't tell whether the distortion is caused by inaccurate emulation, or if it is aliasing from the mp3 codec used.

http://scalibq.wordpress.com/just-keeping-it- … ro-programming/

Reply 14 of 65, by James-F

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No no, there is something wrong with the recording itself of the YMF718, not with the WAV to MP3 conversion.
The MP3s are 320kbps, I doubt anyone could hear the difference (another topic altogether).

Ignoring the bad recording and concentrating on the Pitch and Sound accuracy, Nuked OPL is a perfect match.
Dosbox-Compat is absolutely horrendous here, and I thought is was the most accurate... keenmaster486 was right.

EDIT:
I just noticed there is a MID file of the song.
I will record my YMF719 and be back.


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Reply 15 of 65, by nukeykt

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James-F wrote:

Any examples where dosbox-Fast is less accurate than Compat?

Yes. Now i'm recording song where DOSBox fast and MAME sound inaccurate, but DOSBox compat and Nuked OPL are good.

Reply 16 of 65, by nukeykt

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Ok. I've recorded. YMF718 applies "3D" effect to sound. But i don't know how to disable it.
This song is from Disney's Aladdin port to Windows.

Attachments

  • Filename
    arrock1-ymf718.mp3
    File size
    2.81 MiB
    Downloads
    134 downloads
    File comment
    YMF718 OPL3
    File license
    Fair use/fair dealing exception
  • Filename
    arrock1-nukedopl3.mp3
    File size
    2.85 MiB
    Downloads
    148 downloads
    File comment
    Nuked OPL3
    File license
    Fair use/fair dealing exception
  • Filename
    arrock1-mameopl3.mp3
    File size
    2.85 MiB
    Downloads
    106 downloads
    File comment
    MAME/MESS OPL3
    File license
    Fair use/fair dealing exception
  • Filename
    arrock1-dbfastopl3.mp3
    File size
    2.84 MiB
    Downloads
    113 downloads
    File comment
    DOSBox default, fast OPL3
    File license
    Fair use/fair dealing exception
  • Filename
    arrock1-dbcompatopl3.mp3
    File size
    2.88 MiB
    Downloads
    108 downloads
    File comment
    DOSBox compat OPL3
    File license
    Fair use/fair dealing exception

Reply 17 of 65, by James-F

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nukeykt wrote:

Ok. I've recorded. YMF718 applies "3D" effect to sound. But i don't know how to disable it.

Open windows Volume Control and simply mute "3D WIDE", at least it is how it's on Windows 98.
I you don't see it, enable it in Options->Preference.
If you can please replace your YMF718 recordings without "3D WIDE".

I attached the first Lion track from YMF719.

Attachments

  • Filename
    Lion YMF719.mp3
    File size
    2.13 MiB
    Downloads
    102 downloads
    File comment
    V3
    File license
    Fair use/fair dealing exception
Last edited by James-F on 2016-08-17, 16:37. Edited 5 times in total.


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