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PostPosted: Sun Jan 21, 2018 1:07 pm 
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Joined: Sun Sep 19, 2004 11:12 pm
Posts: 20402
Location: NE Indiana, USA (NTSC)
GradualGames wrote:
Also: "Fixed" arpeggios are hard-coded to the noise channel, "Absolute" arpeggios are hard coded to all other channels. I do not use arpeggios myself---if anyone runs into issues with using arpeggios, please use this thread to report bugs and provide a sample song which causes your issue so that I can fix it.

Does anyone know how common it is to use absolute/relative/fixed with arpeggios on different channels?

Almost all my triangle arp sequences are fixed. Here's why:

My drum kit in FamiTracker 0.4.x and 0CC-FamiTracker uses an absolute arpeggio sequence so that the same instrument can serve as kick and snare, though that could easily be redone with fixed arp using one additional instrument.

Kick (noise part)
note: 0-#
volume: 12 10 8 6 4 3 2 2 1 1 1 0
arpeggio: absolute 10 0
duty: 0

Snare (noise part)
note: A-#
volume: 12 10 8 6 4 3 2 2 1 1 1 0
arpeggio: absolute 10 0
duty: 0

Volume, arpeggio, and duty sequences are identical for the two. (This volume sequence may vary between modules based on the rest of the mix.) It relies on the modulo 16 nature of arpeggio sequences in FamiTracker to act as both kick (whose fixed arpeggio would be 10 0) and snare (whose fixed arpeggio would be 4 10).

Since this post by rainwarrior, kick and snare also have a triangle part that uses fixed arpeggio so that the drum can share the channel with the bass.

Kick (triangle part)
arpeggio: fixed 40 36 33 (E-3 C-3 A-2)

Snare (triangle part)
arpeggio: fixed 47 45 (B-3 A-3)

The remainder of my stock drums, for completeness:

Hi-hat (noise)
note: C-#
volume: 6 4 2 1 1 0
arpeggio: none
duty: | 0 1

Open hi-hat (noise)
note: C-#
volume: 7 6 5 4 3 2 2 1
arpeggio: none
duty: | 0 1

Here, duty is looped to combine hiss noise (duty 0) with buzz noise (duty 1) to simulate a cymbal.

I've attached a FamiTracker port of the drum and bass from the 3 AM music in Thwaite.

Frame 0: Contrasting noise-only drums with tri+noise drums
Frame 1-2: Combining drum and bass
Frame 3: Mute the noise to hear only the bass and the triangle portion of the drum


Attachments:
triangle drums sample.ftm [2.75 KiB]
Downloaded 46 times
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PostPosted: Thu Jan 25, 2018 6:06 pm 
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Joined: Sun Nov 09, 2008 9:18 pm
Posts: 1101
Location: Pennsylvania, USA
tepples wrote:
GradualGames wrote:
Also: "Fixed" arpeggios are hard-coded to the noise channel, "Absolute" arpeggios are hard coded to all other channels. I do not use arpeggios myself---if anyone runs into issues with using arpeggios, please use this thread to report bugs and provide a sample song which causes your issue so that I can fix it.

Does anyone know how common it is to use absolute/relative/fixed with arpeggios on different channels?

Almost all my triangle arp sequences are fixed. Here's why:

My drum kit in FamiTracker 0.4.x and 0CC-FamiTracker uses an absolute arpeggio sequence so that the same instrument can serve as kick and snare, though that could easily be redone with fixed arp using one additional instrument.

Kick (noise part)
note: 0-#
volume: 12 10 8 6 4 3 2 2 1 1 1 0
arpeggio: absolute 10 0
duty: 0

Snare (noise part)
note: A-#
volume: 12 10 8 6 4 3 2 2 1 1 1 0
arpeggio: absolute 10 0
duty: 0

Volume, arpeggio, and duty sequences are identical for the two. (This volume sequence may vary between modules based on the rest of the mix.) It relies on the modulo 16 nature of arpeggio sequences in FamiTracker to act as both kick (whose fixed arpeggio would be 10 0) and snare (whose fixed arpeggio would be 4 10).

Since this post by rainwarrior, kick and snare also have a triangle part that uses fixed arpeggio so that the drum can share the channel with the bass.

Kick (triangle part)
arpeggio: fixed 40 36 33 (E-3 C-3 A-2)

Snare (triangle part)
arpeggio: fixed 47 45 (B-3 A-3)

The remainder of my stock drums, for completeness:

Hi-hat (noise)
note: C-#
volume: 6 4 2 1 1 0
arpeggio: none
duty: | 0 1

Open hi-hat (noise)
note: C-#
volume: 7 6 5 4 3 2 2 1
arpeggio: none
duty: | 0 1

Here, duty is looped to combine hiss noise (duty 0) with buzz noise (duty 1) to simulate a cymbal.

I've attached a FamiTracker port of the drum and bass from the 3 AM music in Thwaite.

Frame 0: Contrasting noise-only drums with tri+noise drums
Frame 1-2: Combining drum and bass
Frame 3: Mute the noise to hear only the bass and the triangle portion of the drum


Thanks tepples. I've added support for all 3 arpeggio types for all channels now, and I am going to try out your example song to see if it executes properly. However, ggsound does not support Sxx. Should it be possible to imitate this effect by other means such as a volume envelope?


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PostPosted: Thu Jan 25, 2018 9:19 pm 
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Joined: Sun Sep 19, 2004 11:12 pm
Posts: 20402
Location: NE Indiana, USA (NTSC)
Yes. For an engine known not to support Sxx or overlay drums, I'd make separate instruments for use with and without a following pitch, one with a volume envelope that terminates and one without.


Attachments:
triangle drums sample noSxx.ftm [3.43 KiB]
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PostPosted: Fri Jan 26, 2018 4:32 pm 
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Joined: Sun Nov 09, 2008 9:18 pm
Posts: 1101
Location: Pennsylvania, USA
tepples wrote:
Yes. For an engine known not to support Sxx or overlay drums, I'd make separate instruments for use with and without a following pitch, one with a volume envelope that terminates and one without.

The only additional thing I had to change so this sample would work with ggsound is every instrument must specify a volume envelope, so I added one for the triangle instruments which lacked one (with a single value of "1").

Would you mind if I included this sample in GGSound's test songs? Worked perfectly with the new arpeggio implementation, happy to say. I will credit you for the contribution in the README.md.

Also, are arpggios ever used with DPCM?


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PostPosted: Fri Jan 26, 2018 4:46 pm 
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Joined: Sun Sep 19, 2004 11:12 pm
Posts: 20402
Location: NE Indiana, USA (NTSC)
GradualGames wrote:
The only additional thing I had to change so this sample would work with ggsound is every instrument must specify a volume envelope, so I added one for the triangle instruments which lacked one (with a single value of "1").

Pently also needs a volume envelope on all instruments, but it defaults to 8 because I've found that more musically useful when pulse and triangle instruments share a volume envelope.

GradualGames wrote:
Would you mind if I included this sample in GGSound's test songs?

Go ahead. I'll provide a more fleshed out version later.

EDIT: Now

GradualGames wrote:
Also, are arpggios ever used with DPCM?

I haven't seen it used.


Attachments:
File comment: FamiTracker version of the music from Thwaite
Thwaite OST.ftm [11.75 KiB]
Downloaded 46 times
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