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FamiTracker > General > FamiTracker Talk > Tilting samples down? Owner: Mr_Master New post
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Tilting samples down? Posted: 2013-07-21 23:23 Reply | Quote
Mr_Master



Member for: 3521 days
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#49711
I was making a track a few hours ago but I figured that I might have needed to lower the volume of the triangle channel by using DPCM samples. I know, Zxx effect can be used to achieve this but my problem is that I am playing samples (which use the full delta-counter range) and tilting them down may have been useful because the delta-counter would end in a high value, making the triangle and noise quieter, so I wanted to know if there's some way to tilt samples down instead of up in FamiTracker or some other external program. Help would be very appreciated.
Posted: 2013-07-22 00:12 Reply | Quote
Necrophageon

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Member for: 3965 days
Location: Minnesota
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#49712
Open your sample in a hex editor and change a few values to F to pull it "down".

The Tilt feature does the opposite and adds (appends?) 0's.

A second, opposite Tilt feature would be pretty cool.
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Posted: 2013-07-22 00:24 Reply | Quote
Xyz_39808

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Member for: 4180 days
Location: South Texas
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#49713
I thought you can set the ending Zxx level in the latest FT. Beneath the dpcm note octave
Posted: 2013-07-22 08:04 Reply | Quote
rainwarrior

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Location: Canada
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#49722
There is no end Zxx. It goes on the start, not the end.
Posted: 2013-07-22 16:43 Reply | Quote
Mr_Master



Member for: 3521 days
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#49739
Well, I tried but failed, although setting an initial delta-counter of 100 or something seems to make APU2 quieter, so yeah, I'll see if I stick to it for now. I think I should also learn how to use a hex editor so thank you all.
Posted: 2013-07-22 18:59  (Last Edited: 2013-07-22 18:59) Reply | Quote
cak

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Location: oregon
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#49754
Another thing you can try is to trim the end of the original WAV so that it ends somewhere between the middle (horizontal) line and the top line.
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Posted: 2013-07-22 19:03 Reply | Quote
Mr_Master



Member for: 3521 days
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#49755
How can I do that?
Posted: 2013-07-22 19:20 Reply | Quote
Xyz_39808

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Location: South Texas
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#49757
Any audio editor. I prefer Audacity
Posted: 2013-07-22 19:35 Reply | Quote
Mr_Master



Member for: 3521 days
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#49762
What I meant is how to proceed in order to achieve that. I mean, what options / functions should I use? That's what I wanted to know, and yeah, I use Audacity.
Posted: 2013-07-22 20:02 Reply | Quote
cak

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Location: oregon
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#49763
I use Goldwave not Audacity, but basically you move to the end of the waveform, zoom in so you can see the samples (tiny lines which make up the waveform), select how much you want to delete, then delete it. It should be relatively easy.
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Posted: 2013-07-22 20:05 Reply | Quote
Mr_Master



Member for: 3521 days
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#49764
Oh, okay. I'll try it and see how it comes out. Thank you.
[Edit:]Hyperlinks fixed Posted: 2013-07-22 22:07  (Last Edited: 2013-07-23 05:27) Reply | Quote
Xyz_39808

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Location: South Texas
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#49766
I Generate a saw wave at super low frequency like 1hz. TimeShift it right enough so that when the signal is at +1.0 the sample you want ends.
[url=https://dl.dropboxusercontent.com/u/39060235/Tilt1.JPG]https://dl.dropboxusercontent.com/u/39060235/Tilt1.JPG

There's no need to have the negative half of the wave, so find the ZeroCrossing and get rid of everything before that.
[url=https://dl.dropboxusercontent.com/u/39060235/Tilt2.JPG]https://dl.dropboxusercontent.com/u/39060235/Tilt2.JPG

Then just QuickMix both waves and get rid of the rest of the saw.
[url=https://dl.dropboxusercontent.com/u/39060235/Tilt3.JPG]https://dl.dropboxusercontent.com/u/39060235/Tilt3.JPG

Remember, the DPCM channel plays upsidedown, so tilting UP in an editor will result in tilting down

(Sega Sample is all on the negative signal side because it's PCM for the GameGear, but it makes the example even more fit)

Attachments:
sega.ftm (6 Kb)
Posted: 2013-07-23 00:20 Reply | Quote
Mr_Master



Member for: 3521 days
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#49768
I think that's what I wanted to know. Only one problem, the first image hyperlink doesn't work. Other than that, thank you.
Posted: 2013-07-23 15:07  (Last Edited: 2013-07-23 15:08) Reply | Quote
cak

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Location: oregon
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#49797
Yes, using part of a sawtooth wave to gradually change the DC offset works too. However you also run the risk of clipping the WAV, so be careful.
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Posted: 2013-07-23 22:11  (Last Edited: 2013-07-23 23:13) Reply | Quote
Mr_Master



Member for: 3521 days
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#49813
Oh, I understand. I'll be careful then.

EDIT: Xyz_39808, I did things slightly different and it worked perfectly! I only have one more question: What version of Audacity are you using? I couldn't find some options but everything worked okay.
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