Testing sound of different MSX sound chips and their FPGA implementations

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By Pencioner

Paladin (982)

Pencioner's picture

06-05-2018, 23:57

So, the test of OPLL (MSX-MUSIC) including two FPGA imcplementations is ready.

Surprizes:
1) the A1WX has so bad audio circuitry so it sounds very ugly comparing to Wavy 70FD, and the difference is not subtle. I should say that for some tunes i'd definitely prefer one of FPGA implementations. I should probably try to apply that infamous sound fix...
2) GR8NET has very good emulaiton. IIRC Eugeny didn't take existing code and worked on own implementation. Great job! There's some glitches on higher freqs but overall sounds very good, it is not very bad even comparing to FM-PAQ with real chip and proper high-pass filter

P.S. Admins - could you please retitle the initial post to "Testing sound of different MSX soundchips and their FPGA implementations" ? Please :)

By Parn

Champion (424)

Parn's picture

07-05-2018, 18:42

My personal ranking:

  1. FM-PAQ by MSX Legend (very clear sound, very low noise, just awesome)
  2. Sanyo Wavy 70FD (clear sound, very rounded and pleasant)
  3. GR8NET (very low noise and clear sound, but a bit messy on the high end)
  4. Panasonic A1WX (heavily filtered, muffled and indistinct)
  5. Carnivore 2 (heavy filtering and butchered drums, I really hated it)

Thanks for taking the time to test them! By the way, the page still says "MSX PSG test" at the title. Tongue

By Eugeny_Brychkov

Paragon (1106)

Eugeny_Brychkov's picture

07-05-2018, 22:24

@Parn: I am happy for GR8NET to be ranked top among hardware emulators in this category Smile

GR8NET's MSX-Music and MSX-Audio were developed from the scratch (and I will never stop thanking wouterv for his time and expertise). I deliberately designed some things differently - for example, envelope is "drawn" using Bresenham's algorithm, and sound amplitude change is smoother by design. And do not forget that just after the birth GR8NET did not have any audio, and it was not planned to have audio at all!

By syn

Paragon (1920)

syn's picture

08-05-2018, 00:54

Parn wrote:

My personal ranking:

  1. Sanyo Wavy 70FD (clear sound, very rounded and pleasant)
  2. Panasonic A1WX (heavily filtered, muffled and indistinct)

Interesting, this is directly contrary to many others, since the panasonics were supposed to have great sound.

To be honest i'm perfectly happy with the sound from my sanyo as well, although I dont have anything else to compare it with. Unfortunately it has a problem with FPGA SCC, and psg might be a bit on the loud side but it never bothered me. I will listen tomorrow.

By Pencioner

Paladin (982)

Pencioner's picture

08-05-2018, 01:06

syn wrote:

Interesting, this is directly contrary to many others, since the panasonics were supposed to have great sound.

Those computers are old. I'm not too into hw so i can't replace all capacitors or so. This might be the issue - i'd like to hear the recording from other A1WX of the same track, to compare, if anybody would be so kind to record it. It was track 07 from Laydock's soundtrack vgm rip.

By ren

Paragon (1279)

ren's picture

08-05-2018, 10:56

Pencioner wrote:

P.S. Admins - could you please retitle the initial post to "Testing sound of different MSX soundchips and their FPGA implementations" ? Please Smile

I think you make most chance when making a moderator alert (on the OP).
Btw, grammatically 'sound chips' (space) is correct Wink

By Guillian

Prophet (3231)

Guillian's picture

08-05-2018, 12:11

Parn wrote:

I like the MFR sound better than the WX one, but I was surprised at how bad the Carnivore sounds. Rounded waveforms, muffled frequencies, really bad. I would like to see more varied samples, especially with more volume variation and some noise as well.

I made a video comparing a real SCC, MFR SD and Carnivore 2. Also a real FM and Carnivore 2.
https://www.youtube.com/watch?v=9ZXvKYnl2Ww

gdx wrote:

You have probably reversed the carnivore file with the MFR file.

Probably he didn't.

By gdx

Prophet (3081)

gdx's picture

08-05-2018, 12:35

Quote:

2. Sanyo Wavy 70FD (clear sound, very rounded and pleasant)
4. Panasonic A1WX (heavily filtered, muffled and indistinct)

The FM sound of the A1WX is to me better than the 70FD by ear, 70FD FM sound is globaly a little attenuated (more or less once in a while), and my impression seems confirmed when I view them.

By gdx

Prophet (3081)

gdx's picture

08-05-2018, 12:43

Guillian wrote:

I made a video comparing a real SCC, MFR SD and Carnivore 2. Also a real FM and Carnivore 2.
https://www.youtube.com/watch?v=9ZXvKYnl2Ww

We were talking about PSG sound, it is possible that it is different for the SCC.

By Guillian

Prophet (3231)

Guillian's picture

08-05-2018, 12:56

gdx wrote:
Guillian wrote:

I made a video comparing a real SCC, MFR SD and Carnivore 2. Also a real FM and Carnivore 2.
https://www.youtube.com/watch?v=9ZXvKYnl2Ww

We were talking about PSG sound, it is possible that it is different for the SCC.

Probably the PSG and SCC implementations are the same (made by Kazuhiro Tsujikawa). The only difference is the mixer/filter.

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