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http://www.smspower.org/Homebrew/SegaMasterSystemYM2413FMTool-SMS

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Sega Master System YM2413 FM Tool
by Chris Covell (chris_covell -at- yahoo.ca)

What?

This is a small, one-screen tool that lets you experiment
with the FM sounds
out of the YM2413 sound source in the Japanese Mark III and
Master System.

Use and Controls:

This tool was programmed for and tested on Japanese SMS
hardware. So, I'm sorry
if it doesn't work properly on an unofficial setup (US/Euro
SMS / MD with PBC...)

I recommend using Japanese paddle controllers, since you can
adjust various level
settings (like pitch) smoothly and naturally. However,
a regular SMS joypad will work.

Other:

I've uploaded an audio sample / slideshow on YouTube
demonstrating the basic and custom
instruments of the YM2413, so you can check that out for
ideas.
The link is ... or search
for user wwwchrismcovellcom.

I've included the source code to this tool. Please,
please go easy on me, as I haven't
programmed Z80 code in 10 years, and this shows in my
inefficient opcode choices. :-/

Have fun!

Chris M. Covell
http://www.chrismcovell.com/
Chris' Journey!

I cannot get the FM unit on Meka or Emulicious, but I have watched the video. Wow man - it really makes you feel that you are missing out on something with a non-japanese console!

Hmm... whether you use Export or Japanese mode in MEKA, as long as you turn on the FM unit in the sound options, it works fine.

For me, at least.

Useful tool. Shows hows misused the YM2413 was (at least on the SMS).

I'm finding controls to be easier (less awkward) with a regular controller rather than paddle control somehow. Shouldn't the second 2 have a separate functionality from Pause button? That would be helpful - I assume the UI was tweaked mainly for the Paddle Control and therefore always assume a single button+pause, but the second button could be used too. With a joypad you could also do thing like pressing Left when you are at the left of an instrument column to key this instrument only.

Would be a good candidate for support of 3/6-buttons controllers.

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Hmmm.... MEKA might have a bug. When a paddle is set on Control Port 2, but a
;joypad is in Control Port 1, MEKA gets constant phantom presses from that joypad.
;There isn't this problem on a Japanese SMS.

That's very probable. Paddle/controllers emulation is shit, it's a miracle it even works. Sorry for that :(

Also nice intro :)

Bock wrote

I'm finding controls to be easier (less awkward) with a regular controller rather than paddle control somehow. Shouldn't the second 2 have a separate functionality from Pause button?

It does, more or less. Press 1+2 on a pad, and then you lock the Key On/Retrigger mode. In this mode, Pause retriggers and holds ON a note, whereas 2 triggers/silences notes when the button is pressed/released.

I've found that I've wanted both types of note triggering simultaneously sometimes...

ccovell wrote

Hmm... whether you use Export or Japanese mode in MEKA, as long as you turn on the FM unit in the sound options, it works fine.

For me, at least.

Yeah, man. I works fine. Sorry, my mistake. I did not turn on the FM unit (it was my first time turning on the FM unit ever) :) Your program gives a nice view of the FM possibilities. A shame the FM unit is not standard on the SMS. That would have been awesome!

Question, does this allow for 2 controllers to be used or just one?

2nd controller detuning is a "secret" option. Shhhh.... ;-)

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