View source for Note Cipher Puzzle

{{Expedition}}
{{Quest Infobox
| name     = Note Cipher Puzzle
| type     = unmarked
| image    = 
| location = [[Nexus of Technology]]
| givenby  = N/A
| rewards  = [[Sonocaster]] unique pistol <br> [[Lemurian Note Sheet]] 5 XP oddity<br>[[Super Steel Refining Data]]<br>high quality [[Super Steel Plates]]
| related  = <!-- link to faction-independent nexus quest goes here -->
| previous = 
| next     = 
}}

Optional puzzle that gives you access to Nexus Tech Vault containing [[Sonocaster]] pistol, [[Lemurian Note Sheet]] oddity, [[Super Steel Refining Data]], high quality [[Super Steel Plates]] and some tech loot.

== Objectives ==

N/A

== Walkthrough ==

Like the [[Mutagen Puzzle]], this is a major puzzle that usually requires out-of-game efforts to solve. It is a music-themed cryptography puzzle where you have to break a musical note cipher. You will get both the ciphertext and its decryption keys, so the objective of the puzzle is to read the instructions and implement a decipher.

The solution for this puzzle is different for each playthrough, but the same decipher will work for any given ciphertext and its keys. The puzzle also changes with difficulty.
* '''Easy:''' A separate encrypted line which contains the tech vault keycode digits, alongside random titles of lemurian compositions that can be used to test your solution before decrypting the numerical code.
* '''Normal:''' The encrypted keycode line is removed. Instead, it is randomly inserted into the lemurian compositions. Keycode digits may appear as text ''(e.g. six instead of 6)''.
* '''Hard:''' Punctuation, spaces and the like are ditched. Instead, all symbols are in groups of five. Roughly 7% of characters are corrupted, appearing as an asterisk.
* '''DOMINATING:''' Same as hard. Corruption frequency might be higher.{{verify}}

=== Puzzle hint locations ===

* Nexus of Technology, administration and IT floor, Mickey Johnson's computer
** '''Theory:Bits_and_Pieces_for_Unschooled_People.odc:''' Explanation of the puzzle's music theory theme
** '''New challenge Mail:''' Mickey's ciphertext

* Nexus of Technology, security technology floor, Allan McLane's computer
** '''Musical_Cipher_Keys.odc:''' Mickey's cipherkeys

'''Note:''' Use {{key|Ctrl}} + {{key|C}} to copy current dialog to clipboard. Allows easily exporting Mickey's ciphertext and keys from the game in plain text format.

=== Random puzzle text ===

These are the random titles of Lemurian compositions used in the puzzle, before any added corruption or tech vault keypad digits. If your own deciphering solution is not forming any sensible text, these might help pinpoint the error without relying on solvers written by others.

{{hiddensection|Lemurian composition titles|
* Hydrothermal Genesis
* Ode to the Sun
* Of Annihilated Past and Future
* Abyssal Horrors
* Servant Dance
* Lemuria - A Hymn to New Beginnings
* Mail from a World Gone by
* Cultivating Light in Darkness
* Claustrophilic Destiny
* Polychromatic Waterscapes
* Dreams of Asphyxiation
* Crimson Meadow Ballet
* The Towering Stars
* The Rite of Spring Tide
* Prismatic Soot
* March of the Protectors
* Linda the Handmaiden
* Strongman Etude
* Electrolin Concerto
* Marriage of a Subislander
* Genetic Intervention
* Omnipresent Pressure
* Celestial Nostalgia
* Restless Waves Caprice
* Citadel of Death
* Coral Fantasy
* The Barber of Subisle
* Rime of the Security Marine
* The Rhythm of Extinction
}}

=== Example ===

{{expand section}}

<!-- example of the puzzle and how to figure out the deciphering process goes here -->

== External links ==

Guides

* https://steamcommunity.com/sharedfiles/filedetails/?id=1814351290 — The Utter Pipeworker's Guide to the Musical Cipher

Solving tools

* https://underrail.com/forums/index.php?topic=4197.0 — Underrail Expedition Music Decipher by hilfazer (offline executable)
* https://shibatora.github.io/underrailmusicpuzzlesolver/ — Underrail Expedition Music Puzzle Solver (hosted online, [https://github.com/shibatora/underrailmusicpuzzlesolver source code])
* https://poligon.hekko24.pl/underrail/ — Underrail Expedition music puzzle help tool by @MZ (hosted online)


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