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FamiTracker
Will the upcoming addition of the FME-7 expansion to FamiTracker allow use of that chip's "hidden" white noise capabilities? I know that Gimmick did not make use of them, but since the chip is essentially an AY-3-8910 at the heart, I think it'd be neat to allow the functionality anyway. Of course, if it's too much work, never mind.
ppMCK supports writing to the envelope's register address using Mx##, but only the best players support it. No player that I know of supports noise playback, though, so implementing support for it might prove difficult... :\
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RE: Upcoming FME-7 White Noise Support?Posted: 2011-12-03 03:59
Speaking of, does the FME-7 have any audio properties of it's own (like an arpeggiator, fine pitch, duty cycles, etc.)? All music I've heard using the FME-7 or the AY-3-8910 it's based on uses a 50% square wave, and all research I've done on it has come up blank in terms of its properties.
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Did the Ricoh 2A03 come equipped with an arpeggiator or is the arpeggio effect just there to compensate for the frame-by-frame freedom you'd get with hard coding?
I'm sort of talking out of my ass, so I beg your pardon if this doesn't make any sense. :P
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The FME-7 (just like the AY-3-8910) only supports 50% squares, pitch envelopes and noise (which, as I said, isn't emulated by any player in existence).
To get a grasp of what the envelope thing sounds like, listen to this example by ~J-@D!~ :
[url=http://dl.dropbox.com/u/34026765/TESTFME7.nsf]NSF
[url=http://dl.dropbox.com/u/34026765/TESTFME7_solo.nsf]NSF with 2a03 muted
[url=http://dl.dropbox.com/u/34026765/TESTFME7.MML]MML source
Make sure you open it in [url=http://www.zophar.net/utilities/nsf/virtuansf.html]VirtuaNSF; I don't know of any other player that supports it.
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I'm using a complete AY-3-8910 emulator so support for noise is planned in some way. It's not supported by all players (which is important to be aware of), but at least a few. There was a famicompo song with noise a few years ago.
Not supported by ALL players, eh? Then perhaps some research is in order!
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It does not, at least not according to my sources.
There is a ppMCK command for FME-7 noise (N<num>), and ~J-@D!~ made some tests using it, but to my knowledge he couldn't find any player in which the effects of that command were audible. There's always the possibility that he wasn't using properly (the command, like many other similarly obscure ppMCK functions, is undocumented), but knowing James, that's improbable. :p
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I just poked through the sources and anything that uses [url=http://slack.net/~ant/libs/audio.html]GME (including foo_gep, also anything I've written) does not support noise or pitch envelopes.
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The AY-3-8910 can also play a square wave and noise on the same channel at the same time, both at 50% volume. Again, not sure if any players can support that... but maybe Famitracker will.
I'll take a look at the ppMCK stuff though, thanks for the tip.
