Meridian - Progress update

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By MichieldeVries

Rookie (24)

MichieldeVries's picture

02-07-2003, 20:07

Hmmmmm, I've had a previous Meridian version with OPL4 PCM support in which the instruments really were off tune. In this new version, Michiel created a GM bank with pretty good sounds, I think. Only certain pianos are off tune, as he states himself...
Yeah, that's true. The current GM-bank is still a trial version, and as you all could hear, it need to be improved. For example, I didn't use any FM tone, too bad, we all missed 18 extra channels.

But for the other instruments....If you think THIS is off tune, Grauw, I could send you a Meridian version which REALLY is off tune
Hey, I'm interested in that version too. Big smile
Hehe.. what I mean is that Meridian is not 'off tune', the Opl4 program is. You can retune it yourself in the editor. Come on.. make some experiments.

What I would like to see Michiel implementing is a question before saving...With my mouse, I sometimes choose the Save option instead of Load option. They are right below each other and it's easy to make a mistake. A question 'Are you sure?' would be VERY VERY handy......
Good point. Easy to fix. I never noticed it, because I like working with shotcuts, F2 in this case.

I by the way still haven't been able to reproduce the problem on 3.5 MHz. Very weird.
I think it's just a 7MHz problem. The delays between the register writes are too short. Need to be fixed, but I don't have a 7MHz MSX.

I did find another 'bug' by the way, if I use my mouse to move a scrollbar, the mouse cursor moves faster than the scrollbar does... I think it moves about 1.5 timestoo fast, or maybe even 2.
I know, and I'm used to it. Consider it as an documented feature by the author Big smile

Another thing, in an edit box (song properties or simply the song editor), if you type a capital character (for example B), and you release the SHIFT key *before* you release B, it shows Bb. So apparantly releasing the SHIFT key triggers a key event which it shouldn't.
That is realy a nasty one. I've been thinking a long time about it how to fix this problem. I'll keep it in mind.

By Grauw

Ascended (9666)

Grauw's picture

04-07-2003, 22:46

>>I by the way still haven't been able to reproduce the problem on 3.5 MHz. Very weird.<<

I think it's just a 7MHz problem. The delays between the register writes are too short. Need to be fixed, but I don't have a 7MHz MSX.
Seems so... but the problem only arises in a very few cases. Makes me think it's only a matter of a couple of T-states. Also, I don't hear any weird notes or instruments when I play on 7MHz (like the Music Module does with MB's tightly timed register access), so it can't be that bad... I think if you analyze which notes/commands get played at the positions I mentioned, you can get a pretty good estimate at which OPL4 register write is just a tad too fast. And I'd be happy to test it for you.

Hmmmz... I just looked at the positions giving trouble (they don't anymore now by the way, as I said, really weird, but that's what happens with tight timing)... They don't seem like anything really special. The only similarity I can see is that all three positions play the C#5 and E5 at the same time (in different instruments). So maybe the time between the C#5 calculation and E5 calculation is too short...?? Well, you're the expert Smile.

>>Another thing, in an edit box (song properties or simply the song editor), if you type a capital character (for example B), and you release the SHIFT key *before* you release B, it shows Bb. So apparantly releasing the SHIFT key triggers a key event which it shouldn't.<<

That is realy a nasty one. I've been thinking a long time about it how to fix this problem. I'll keep it in mind.
Well, apparantly the way I type is weird or something (I also always trigger the bug in the keyboard matrix when I type <shift>MSX, or cd<space>... The first triggers the F1 key aswell and the second adds a ghost HOME keypress (makes me wonder if openMSX poperly emulates this behaviour too ;p) (another nice one, try <shift>CD and it will also ghost the CTRL key).

Anyways, it seems in 50% of the cases I release the shift key before the character, so this behaviour in Meridian is really a pretty annoying bug for me Smile. I have to type really s... l... o... w... Is it really *that* hard to fix?

Oh, and Meridian crashes everytime I press F1, because the helpfile isn't there... -_- used as I am to MoonBlaster... I keep pressing it everytime, and after that I need to reboot -_-;;;.

Well, I hope this gives you enough to work on Smile.

~Grauw

By snout

Ascended (15184)

snout's picture

06-07-2003, 03:53

I just started a new thread about Meridian 3.0 beta. Please continue the discussion over there. This topic has been closed.

Link to the new topic: Here it is!!

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