Swapped Rhythms was created and owned by: https://soundcloud.com/punniester-master_2019
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Swapped Rhythms is an Undertale AU which essentially, character motif swaps with their other respective motif, for instance: "Fallen Down" with "Heartache", "Determination" with "Bergentrückung", etc...
The creator has also designated that the character designs and attributes are remodeled: Sans wearing a black tank top and ostensibly trousers, his flashing eye presented in his right orbit instead of his left, and a special feature on his left hand waving a blue glint. The aforementioned aspects are revealed earlier on here: https://soundcloud.com/punniest-master_2017/swapped-rhythms-megalovania
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The tracks composed may or may not be official though.

Youtube version: https://www.youtube.com/watch?v=yRcbsS_rdgQ&list=PLB71Dd48fmYs3-DEQirQnQxnRo6kX1SsE

Undertale/Deltarune AU - Swapped Rhythms (Moon's Musical Rendition)

This replaces "Once Upon a Time"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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All the leitmotives are from "Your Best Nightmare" if you still can't tell. The 2nd part is from the unused part of it and heavily modified, though the rest is mildly modified as well. Again, it's a fan-track if not official.
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://sasuisgay.tumblr.com/post/142091733012/velocesmells-once-upon-a-time-i-tried

Youtube: https://www.youtube.com/watch?v=yRcbsS_rdgQ

[Undertale AU][Swapped Rhythms] In Times Gone by...

This replaces "Ghost Fight"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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The original Swapped Rhythms Ghost Fight belongs here: https://soundcloud.com/punniest-master_2017/swapped-rhythms-ghost-fight
This is also my first Ghost Fight theme. I essentially replaced all the "Ghost Fight" leitmotives with mainly Spooktune (and Spookwave instrument & effect wise), Thundersnail, Ghouliday, and a subtle Pathetic House at last part (still a Ghost Fight motif but eh).
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://www.instagram.com/p/BldkMetBIPD/?taken-by=brogancoral

Youtube: https://youtu.be/rtFW9ZIN_5A

[Undertale AU][Swapped Rhythms - Napstablook] Spooky Session

This replaces "Home"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Aaaaand here's my first Home recreation!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://www.deviantart.com/bluekomadori/art/Toriel-and-Frisk-578727239

Youtube: https://youtu.be/6b1Vh9wykO8

[Undertale AU][Swapped Rhythms - Toriel] House of Warmth + Music Box/Night

This replaces "Fallen Down (+ Reprise)"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Also first "Fallen Down" recreation! I mostly used the "Heartache" instrumentation [Proteus] for this because using the original instrumentation would not be as fun as this to compose. Anyways... here's the original Fallen Down for SR: https://soundcloud.com/punniest-master_2017/swapped-rhythms-fallen-down
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: Couldn't find it unfortunately

Youtube: https://youtu.be/R289B4DJPas

[Undertale AU][Swapped Rhythms - Toriel] Heart of Kindness (+ Reprise)

This replaces "Menu"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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I tested the new "Magical8bitplugin" VST and I'm honestly really digging it! Anyways, here's my 2nd "Start" remix after the one I composed for my "Chara and Asriel Swap" project!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://wolven0ne-universe.tumblr.com/post/176778132058/an-endlessabyss-guys-ill-open-commissionssss

Youtube: https://www.youtube.com/watch?v=v_CkezkS1Qo&feature=youtu.be

[Undertale AU][Swapped Rhythms] Select Screen (Full)

This replaces "Your Best Friend"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Thought I could add more creativity into this.
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://www.deviantart.com/75312350312/art/flowey-668975632

Youtube: https://youtu.be/n5ilewHFvBc

[Undertale AU][Swapped Rhythms - Flowey] Flowey's Theme!

This replaces "Nyeh Heh Heh!" and "Bonetrousle"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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If you're wondering if I used the beat from "Dating Fight" for the last part, then yes!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://www.deviantart.com/pdubbsquared/art/Bonetrousle-Redux-597976121

[Undertale AU][Swapped Rhythms - Papyrus] Cool Chortling + Freezing Frenzy

This replaces "Snowy"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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I accidentally deleted this one so I had to reupload it!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Undertale AU][Swapped Rhythms - Area] Snowdin Forest

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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sans, the puny skeleton ridin' a ton of skeletal horses.
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Sans of Image: https://www.deviantart.com/tsaoshin/art/Sans-579956243

[Undertale AU][Swapped Rhythms - Sans] sans.

This replaces "Ruins"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Youtube: https://youtu.be/V-a3WxsFHIY

[Undertale AU][Swapped Rhythms - Area] Relics

his replaces "Waterfall"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Undertale AU][Swapped Rhythms - Area] Choral Cascade

this replaces "Quiet Water"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Be all prepared for "Don't Give Up" anytime soon!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Undertale AU][Swapped Rhythms - Area] Serenity

This replaces "Spear of Justice"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Undertale AU][Swapped Rhythms - Undyne] Fight Against a Bringer of Justice

This replaces "NGAHH!!"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Undertale AU][Swapped Rhythms - Undyne] The Wind is Howling

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Undertale AU][Swapped Rhythms - Sans] Premonition

This replaces "Dummy!"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Last track is my first "Spider Dance" remix, now it's my first "Dummy!" remix! Also the title is suggested by The GREAT DIMENSION LORD of namely, Sensetale: https://soundcloud.com/that-jester-dude
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Track 3/3 for a week
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://www.deviantart.com/flipgang/art/dum-dum-DUMMY-569759906

[Undertale AU][Swapped Rhythms - Mad Dummy] Ghoul Fools

This replaces "Dating Start"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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All Swapped Rhythms songs can now be downloaded!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: https://www.artstation.com/artwork/1aLxq

[Birthday Special][Undertale AU][Swapped Rhythms - Date] HOW TO DATE A COOL DUDE (SUCH AS MYSELF!!)

This replaces "Heartache"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Thank you everyone for the special day! I hope you guys are having fun and have a nice day! Also, this is another gift for all of you my followers! (It's still May 22nd anyway lol) I decided to update this with more motifs inclusion, moreover earthbound-styled since simply, it's Fallen Down and I already did a Heartache-styled Fallen Down few months ago. Hope you enjoy this update more than the outdated one!
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Birthday Special II][Undertale AU][Swapped Rhythms - Toriel] Fallen into Delusion (V2)

Title (in-order):
-Qualms of Persisting
-The Soul Knight
-Life or Death

These replace "Danger Mystery", "Undyne", and "Run!"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

[Undertale AU][Swapped Rhythms - Undyne] Overworlds

This replaces "Determination"

Swapped Rhythms was created by: https://soundcloud.com/punniester-master_2019
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Check out the entire playlist of Moon's musical rendition of Swapped Rhythms here: https://soundcloud.com/thesecondstrike/sets/undertale-au-swapped-rhythms

Source of Image: http://joyreactor.com/post/4004482

[Undertale AU][Swapped Rhythms - Asgore] Reminder for Our Future's Sake!

You still have no idea who I am... Ok some things about me, just a really busy 16 year-old guy who's spontaneously producing au tracks. I take requests ocassionally or when i have more free time. i work on many aus (including someone's au) and several UT fangames. I make roleswap au tracks a lot more than crossover ones. I mostly make death by glamours, battle against a true heroes, heartaches, and asgores because those are my favorites and really fun to make. I don't make megalos (really sorry but I'm just not really into that) though I make custom genocide run final bosses at some point.

And here's my discord: MoonStriker#0730

QnA:

Q: Do you have any AU?
A: Yeah, I have: Rolled Cycle (Swapspin), Last Hope, and Underswitched. "Will I make songs for one of theses aus?" Someday, yeah. 
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Q: Can I use your musics for my au?
A: Sure! If the description of the certain music says that, then yes! I'm wary about Deltarune aus, though.
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Q: Do you have any song project?
A: I consider "Chara and Asriel swap" to be my primary music project. There's more such as "Chaos Kings" and "Doused Flames". Upcoming project might be "Toriel and Asriel Swap" or "Mettaton and Asgore Swap". I'm not sure, but you can decide which one too based on what you're interested with.
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Q: Do you take request?
A: Yes, but that depends or it'll take some time to actually do it.
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Q: What is your favorite UT music?
A: For battle theme: Battle against a True Hero goes to number one! Death by Glamour goes to second! And finally... ASGORE goes to third! Last but not least... Heartache or Spear of Justice? I don't know, both are on-par to me =P As for area theme, Waterfall and Another Medium for the win!

Undertale/Deltarune AU - Swapped Rhythms (Moon's Musical Rendition)

MoonStriker (Archive II)