OpenMSX and ePSG or dual/double PSG

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By Grauw

Ascended (9285)

Grauw's picture

22-08-2020, 19:44

WYZ wrote:

@Grauw I own a Japanese HX-21 and always consider this full channel panning (not a real stereo).

But what is real stereo then? Configurable panning per channel (for noise you can)? Non-hard panning? Stereo is stereo if you ask me. How much convenience and limitations the implementation gives is separate...

By Manuel

Ascended (16864)

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22-08-2020, 22:47

One problem is that the distribution of the PSG channels over the stereo channels is not consistent from MSX to MSX (if my information is correct). Pioneer has channel 2 on left and channel 3 on right, and Toshiba has this reversed. No standardization there....

By Grauw

Ascended (9285)

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22-08-2020, 22:55

Luckily it's only left and right that are swapped so you can easily reverse the cables. It won't even matter if the side is not connected to visuals. The Amstrad CPC also has stereo PSG, so you may find more music composed for stereo on that platform, but there the channel A is not center (it's channel B)

By Juan Luis

Expert (109)

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23-08-2020, 02:01

Gradius2 wrote:

Of course, I edited the original GT with the new values... still not working.

It's strange. Here you have my Panasonic_FS-A1GT.xml configuration file. It works fine for me.
https://justpaste.it/69nzg

By Gradius2

Hero (598)

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23-08-2020, 02:10

Manuel wrote:

One problem is that the distribution of the PSG channels over the stereo channels is not consistent from MSX to MSX (if my information is correct). Pioneer has channel 2 on left and channel 3 on right, and Toshiba has this reversed. No standardization there....

Pioneer did that due to their audio cassette encoded on LD discs to load the game.

By Gradius2

Hero (598)

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23-08-2020, 02:13

Juan Luis wrote:

It's strange. Here you have my Panasonic_FS-A1GT.xml configuration file. It works fine for me.
https://justpaste.it/69nzg

Are you sure? Of course it will boot and the machine will works, but its the sound its the problem.

There is NO dual PSG enable there. I tested with dotatk game and I can confirm it DOESN'T works.

By Parn

Hero (603)

Parn's picture

23-08-2020, 04:42

You just want another PSG to play Dot Attack? Use the MegaFlashROM SCC+ extension, it has an extra PSG. Also, try using the machine XML I made. In Dot Attack, if you use Sound Mode C you'll have sound effects and stereo music. If you use Sound Mode B music will be mono but SFX will be stereo.

By Juan Luis

Expert (109)

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23-08-2020, 13:36

Gradius2 wrote:
Juan Luis wrote:

It's strange. Here you have my Panasonic_FS-A1GT.xml configuration file. It works fine for me.
https://justpaste.it/69nzg

Are you sure? Of course it will boot and the machine will works, but its the sound its the problem.

There is NO dual PSG enable there. I tested with dotatk game and I can confirm it DOESN'T works.

Ok. I have also tried Dot Attack and I can't hear the sound in secondary PSG either, however I was able to hear the second PSG with vgmplay and Alcon arcade melody 02.

Sorry Gradius2, I tried to help.

By Parn

Hero (603)

Parn's picture

23-08-2020, 15:35

Just use my configuration above. I tested it. It works.

By Gradius2

Hero (598)

Gradius2's picture

24-08-2020, 03:23

Juan Luis wrote:

Sorry Gradius2, I tried to help.

No need to apology or anything, lol.

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