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FamiTracker > General > Show Off Your Work > one channel - dpcm Owner: rmk New post
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one channel - dpcm Posted: 2010-08-26 20:36 Reply | Quote
rmk



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#9025
i just get some dpcm from many nsf songs, so i make to test it.


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000.ftm (13 Kb)
Posted: 2010-08-26 20:51 Reply | Quote
Delek

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#9026
Makes remember me the intro of Zombie Nation. Also made entirely with DPCM.

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Posted: 2010-08-27 03:49  (Last Edited: 2010-08-27 03:50) Reply | Quote
TechEmporium

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#9036
That's pretty good. However, I'm still struggling to make decent DMC files that plays C# in different octaves, as triangle waveforms. If anyone has a tutorial of some sort that I can use to create my own DMC file that actually sounds proper, drop me a line!

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Posted: 2010-08-27 05:07  (Last Edited: 2010-08-27 05:16) Reply | Quote
kinkinkijkin

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#9045
Well.... it's amazing what you can manipulate the limits of DPCM to do for you. I also made something demonstrating such limitation exploiting, but I'm using it in a community project at POM.net, no peekies.

EDIT: Made a very realistic noise guitar *tribute to POM.net, to where I have been banned for a week* and did a simple tune, added DPCM. Notice how when the Snare hits, the guitar is quieter. Makes for a nice echo effect, if you can find anything louder that you wouldn't notice or would tie in with the song. Though, it is used for echo here.


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dpcm_manipulation_test.ftm (2 Kb)
Posted: 2010-08-27 05:33 Reply | Quote
TechEmporium

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#9047
(Rolls eyes) POM.net isn't even a valid website. :P

Basically, you thought you were banned when the website's domain name expired.

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Posted: 2010-08-27 06:07 Reply | Quote
kinkinkijkin

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#9048
POM is short for punk-o-matic.net.

Posted: 2010-08-27 07:06 Reply | Quote
nicetas_c



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#9055
[quote=TechEmporium]...However, I'm still struggling to make decent DMC files that plays C# in different octaves, as triangle waveforms...[/quote]
Rushjet1 made one.


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triangle.fti (1 Kb)
Posted: 2010-08-27 08:13 Reply | Quote
rmk



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#9059
[quote=kinkinkijkin]Well.... it's amazing what you can manipulate the limits of DPCM to do for you. I also made something demonstrating such limitation exploiting, but I'm using it in a community project at POM.net, no peekies.

EDIT: Made a very realistic noise guitar *tribute to POM.net, to where I have been banned for a week* and did a simple tune, added DPCM. Notice how when the Snare hits, the guitar is quieter. Makes for a nice echo effect, if you can find anything louder that you wouldn't notice or would tie in with the song. Though, it is used for echo here.[/quote]

cool, you make some melody from a noise channel!



Posted: 2010-08-27 08:15 Reply | Quote
rmk



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#9060
[quote=nicetas_c][quote=TechEmporium]...However, I'm still struggling to make decent DMC files that plays C# in different octaves, as triangle waveforms...[/quote]
Rushjet1 made one.[/quote]

RUSHJET1 RULES !!

Posted: 2010-08-28 02:16  (Last Edited: 2010-08-28 02:22) Reply | Quote
TechEmporium

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#9078
Yeah; he only made one for octave 3. The sample's audio will start crackling if you try to use it for higher octaves.

What I'd like to know is what offsets would I need to manipulate when editing the DMC file in a Hex editor.

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Posted: 2010-08-28 05:43 Reply | Quote
nicetas_c



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#9085
[quote=rmk]RUSHJET1 RULES !![/quote]
All these 4 samples screw up in NSF players when looped.
[quote=Rushjet1]good luck making a 17 bytes long triangle sample[/quote]
Something like that.

Also, only the C# is made by Rushjet1, the others are actually from Kurobit, if I am not wrong.

Posted: 2010-08-28 06:08 Reply | Quote
TechEmporium

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#9087
Sorry about that; Kurobit made the 3 C natural samples, while Rushjet1 made only 1 C# sample.

As for the looping problem, I've noticed it when I made that transcription of the Father Ted opening theme; when the samples are looped, they eventually mute themselves out. That's why they shouldn't be used for sustained notes (what I had to do to sustain the notes was to replay the same note a second time, right at the point the first note dies down).

I've also noticed that something in the DPCM channel also mutes out the sample (but I don't know exactly what's triggering it).

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Posted: 2010-08-28 06:46 Reply | Quote
nicetas_c



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#9090
[quote=TechEmporium]Sorry about that; Kurobit made the 3 C natural samples, while Rushjet1 made only 1 C# sample.

As for the looping problem, I've noticed it when I made that transcription of the Father Ted opening theme; when the samples are looped, they eventually mute themselves out. That's why they shouldn't be used for sustained notes (what I had to do to sustain the notes was to replay the same note a second time, right at the point the first note dies down).

I've also noticed that something in the DPCM channel also mutes out the sample (but I don't know exactly what's triggering it).[/quote]
Like this one?

It is possible that the delta counter goes all the way to 7E~7F but does not make its way back, so the counter sticks around 7A~7E.

Looped PCM samples screw up in NSF players if mod(size,16)=1.


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dmc.dmc (0 Kb)
Posted: 2010-08-28 20:50 Reply | Quote
TechEmporium

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#9097
Yes; you just hammered the nail there, nicetas_c. I just tried it out; one note in one NSF for a continuous loop. Indeed, it not only failed in the NSF player, but the loop also failed in FamiTracker.

Anyways, I was actually looking for some higher-octave C# samples to go along with the C natural samples that Kurobit created.

The octave 3 C natural sample that Kurobit made goes well with the octave 3 C# sample from Rushjet1, but sadly, there are no octave 4 or octave 5 versions of C# around. If anyone's willing to create some (or to at leach point me to the right direction about creating them properly,) please drop me a line.

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