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Ok, brief explanation on how to do it, but then you're on your own. Create a file that is a 1 bar loop. Convert it to 8 bit unsigned mono and 32768 samples long. Hint on the last part, making it exactly 1 second long and then converting it to 32678 Hz sample rate should at least get you close. You might need to manually trim or add a couple of samples with a hex editor. If you're adding samples, repeat the last sample value in the file or so. (Who ever said this was supposed to easy?)
Run the following Python script. It will convert the file you've created to the 4-bit format the Gameboy so much craves and create a new ROM with your sample.

def fourbit(x):
    return ord(x) & 0xf0

def fatconv(fn):
    f = open(fn + ".raw", "rb")
    x = f.read()
    f.close()

    if len(x) != 32768:
        print "File should be 32768 samples long, yo. 8-bit unsigned mono is where it's at, dawg. Raw with no header. (That's what bshe said.)"
        return

    g = open("amenizer.gb", "rb")
    gb = g.read(16384)
    g.close()


    y=map(fourbit,x)
    y=zip(y[0::2],y[1::2])

    #f = open(fn + "-conv.bin", "wb")
    g = open(fn + "-rom.gb", "wb")
    g.write(gb)

    for i in y:
        #f.write(chr(i[0] | i[1]>>4))
        g.write(chr(i[0] | i[1]>>4))

    f.close()

fatconv("filenamehere")

However, the final version of this application, when it comes out, will surely blow your minds. Just a prediction.

The avatar, it's just that your browser aggressively refuses to load the new avatar. You could always go to the avatar directly and hit refresh. Next time you refresh a page with your avatar, you should now see the new avatar there as well.

http://chipmusic.org/forums/img/avatars/1942.png

Of course, this affects only yourself, not anyone else. Let me see if I can make a quick hack to fix it.

This code does not exist yet. That's why I'm trying to explain that it's a big project.

However, the offer to make a ROM with a return mechanism for your other ROMs for you is still open. Of course, this already works in LSDj by default. (sel+start+B+A.)

Absolutely. I just added it to LittleFM because it seemed natural. The plan is to eventually release a standalone menu ROM and patcher. Ideally, I want to wait until I've made a ROM which handles SRAM management properly. What I have in mind is a to store sav for games/other software in an LSDj type file system, so LSDj could share a cartridge with other thing using SRAM, and so that the standalone version will use SRAM more efficiently than current menus.

However do you really need a version without LSDj? You've still got 3 MB of free space. Do you need the extra 1 MB for other ROMs? If not I'd just put the same big multi-ROM on both "pages" so you don't have to worry about switching/being stuck on page 2.

I already have a way of doing this. However, this currently requires manual patching of each ROM to add a bootstrap for the return trip. I've actually already done this to a number of ROMs for testing. If you tell me which extra ROMs you want, I can prepare a ROM for you.

Is that the ratings?
Z = 4 but n = only 2

Interest peeked... Go ahead.