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FamiTracker > General > FamiTracker Talk > DPCM: How To Prepare Samples Owner: Moerdsch New post
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DPCM: How To Prepare Samples Posted: 2009-01-29 20:55 Reply | Quote
Moerdsch



Member for: 4890 days
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#2380
Hi. I've registered here a few minutes ago and I want to thank jsr for his efforts to create an awesome tracker. I thought I would never use a tracker again, since I was dissapointed with a few others... But now to my question!

I need some advices for working with the DPCM channel. My results with it are not really god and I'm still not able to solve it. After decoding they sound heavy distored. Of course I'm aware that this is the default. However I've been experimenting a bit.

I am using mastered samples from a sample cd if that is important. So I've read somewhere that especially lower and higher frequencies are more likely to distort when the volume's high. So I opened my sequencer, slapped a sample in the sampler and added an equalizer to it. I've lowered the low's and heights, and then exported it to WAV PCM. However when I import that edited sample, it sounds just a bit better, but still it's distorted as hell. Even when I lower the frequencies drastically.

I don't know how to do it. Anyone has an idea how to improve? I'm thankful for any advice.

Yours
Moerdsch

Posted: 2009-01-30 11:16 Reply | Quote
Dafydd

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Member for: 5304 days
Location: Uppsala, Sweden
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#2382
You're resampling something into a really low bitrate and the chance you'll make anything sound any good is really small. I wish I could give you some advice...

Posted: 2009-01-30 17:10 Reply | Quote
Cheez



Member for: 5897 days
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#2384
bitrate nothing. the amount of information making up the sound is next to nonexistent. you're not going to get everything to work with it.

Posted: 2009-01-31 00:35 Reply | Quote
Dafydd

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Member for: 5304 days
Location: Uppsala, Sweden
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#2385
bitrate something

Posted: 2009-01-31 17:20 Reply | Quote
Moerdsch



Member for: 4890 days
Status: Offline

#2387
I tried it again and I think the results got better. Here is a NSF file I make for someone to use them for a game (not finished). The problematic samples are on the first song. These are a Hard Dance Kick and the sameone with a layered Clap. The kick is very tricky to mix. What do you think?

Btw. the other DPCM samples (you find them in the second track) are also mastered ones from my sample CD's altough those work pretty good. Well, but you can't compare them so easily.


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Warfare Alliance.nsf (20 Kb)
Posted: 2009-01-31 18:23 Reply | Quote
Shiru



Member for: 4890 days
Location: Russia, Moscow
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#2388
To get better DPCM sound it's better to use really short samples, without long fadeouts. You'll get many noise on fadeouts anyway, and also don't forget that samples affects to volume of triangle and noise channels. You can also make clean drums without DPCM, using other channels with fast slide down (you can also combine both methods). Don't rely on DPCM too much.

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Posted: 2009-01-31 19:18 Reply | Quote
Moerdsch



Member for: 4890 days
Status: Offline

#2389
I forgot to mention that I also cut the samples, used in the track within a sequencer program. I guess this was the real problem instead of drastic equalizing (I still recomment EQing).

I should've known better. Konami's kick drums are very short, I should've taken them as references...

Thanks people.

Posted: 2009-02-01 23:50 Reply | Quote
furrykef

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Member for: 5189 days
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#2394
I often get less distortion when I use the very lowest volumes (1-3) when importing the WAV file into FamiTracker. Of course, then the sample is kinda quiet, but some samples simply will not ever sound good when they're loud.

How good a sample sounds is very dependent on what the sample is. Bass drums and snare drums tend to come out really nicely, for example, but some other sounds simply will never be listenable on the DPCM channel. It all just depends on the shape of the waveform...

- Kef


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