SpritesMind.Net

I don't know if it's due to my PC or SGDK, I post this in case someone else would encounter the same behaviour, which could give a hint about the cause. My PC crashes consistently (about 1 every 5 compilations) when I compile the xgmplayer sample. I'm not speaking of a compilation error, but a true ...

A simple typo left in main.c source code :

line 288 : SPR_initEx(20, 80, 64);
Should be : SPR_initEx(80, 64);

Also, for nitpicking, line 63 : 0x0044, // D - dark yellow
Should be : 0x0044, // E - dark yellow

ok, I'm going a similar way (except that, since I didn't know MML, I used a custom format).

Is there somewhere a VGM (or at least an XGM one) file that uses all 4 PCM channels (or at least more than 1) ?

All the samples from xgmplayer example use only one PCM channel.

Or do I have to mix my channels "by hand" ?

Do you think it'd be feasible to add a kind of JSR feature (jump to another part of the xgc code, and a return code) ?

It'd allow to store separately instruments settings, or isolate repeating patterns of music ?

I guess it's not so easy, because you must have thought about it.

Salut Stef, j'espère que tout va bien, je te croise plus trop sur le forum des malades (qui porte de "mieux en mieux" ce titre). The first reason is that I don't want to rely on any external tool (besides the ones I wrote myself). The second reason is that, at some point, I may want to modify the XG...

Bilingual post :P Je veux générer moi-même mon code XGM. Je me suis donc orienté vers la spécification du format qu'on trouve ici : https://github.com/Stephane-D/SGDK/blob/master/bin/xgm.txt Et j'ai voulu m'assurer de deux-trois trucs en regardant un XGM directement dans la ROM de sample/xgmplayer. ...

The YM2151 has a second Detune parameter which affects noticeably the generated sound. Is there a way to reproduce it ? I can't change the channel frequency because it affects only one operator...

Is the only way to turn it into a sample ?

Thank you !

I have some questions about channel 6 DAC mode : 1) do you confirm there's a 9th bit of value at bit 3 of register 2C ? I don't see this register mentioned in most documentations, nor in VGM specs, in particular data blocks are byte based, does it mean that all YM2612 vgm dumps are wrong ? 2) if I w...

Thanks, that confirms what I thought!

I'm "disassembling" some VGM from MD games, and notice many weird stuffs. For example, I have something like that : 000000: [channel 1] [operator 3] TL = 16 000000: [channel 1] key off 000000: [channel 1] [operator 3] TL = 8 000000: [channel 1] [operator 3] TL = 29 000000(1FD6): [channel 1] key off ...

So, according to this page, it seems that in audio we use the dB for tensions (why ?), which is different (why ?).

So it's indeed 10^(dB/20), which indeed equals roughly 2^(dB/6).

Thanks

Your formula is an approximation of mine (with a division by 3 rather than 6, unless I missed something, like efficace value or something like that, which is quite possible).

10^(db/10) = (2^1/log(2))^(db/10) = 2^(db/(10log(2))

and 10log(2) = 3.0103...

Unless the true formula is 10^(db/20) ?

Another question : when I translate decibel coordinates to linear ones (whatever they are), I did : attenuation_in_dB = 10*log(I_max/I) where I is my linear amplitude and I_max the maximum amplitude (since I use 16 bits integer, I_max = 32767), which led to : I = I_max*10^(-attenuation_in_dB/10) = I...