Cacophony - Solution

Written by Tom Panenko, Brian Shimanuki, Liam Thomas

Answer: TONE DEAF

We are given an audio file with words/phrases overlaid in two voices. There are 35 pairs, one each second. These pairs clue a word that goes after the low voice and before the high voice in one of two ways: semantically or as a prefix/suffix. The pairs in the audio file are alphabetized by the middle word.

low voicemiddle wordhigh voice
nickelBACKfire
flourBATTERcake
tongueBEAKrhamphotheca
chaserBEATERkeeper
buzzardBOGEYpar
full priceBOGOfree
lionsDENmark
harveyDENTcorn
summerFALLwinter
feeFIfo
tenJACKqueen
estherJOBpsalms
knock knockJOKEaround
shinKNEEthigh
I don'tKNOWit-all
formerLATTER*day saints
stageLEFTovers
ash wednesdayLENTeaster
forkLIFToff
lionLIGERtiger
highLIGHTERfluid
singletonLISTtable
secMINhour
handMITTbaseball
castleMOATinvaders
lymphNODEjs
graceNOTEbook
shortTALLgrande
williamTELLtale
nineTENeleven
loseTIEwin
mistleTOEnail
saraTOGAparty
ghanaTOGObenin
vinyasaYOGAmat

*LATTER is unique in that the preceding word (former) acts sematically while the succeeding phrase (day saints) acts as a compound. Despite this, both sides are some of the more obvious connections in this puzzle and so we decided this was acceptable

A lot of these words sound similar. In fact, we can form 7 set of phoneme ladders where one sound changes to another sound between each consecutive pair of words. In each ladder, if we look at the added sounds, they will form a valid word in one of the two directions.

Extracted word from added sounds
BEAKBACKJACKJOKEJOB
AHJOEB---
EEBAHKCABBY
BEATERBATTERLATTERLIGHTERLIGER
AHLAIG---
EEBAHTTABBY
BOGEYBOGOTOGOTOGAYOGA
OETUHY---
EEBOETTOBY
DENTENTELLTALLFALL
TLAWF---
DNEHTTEND
DENTLENTLEFTLIFTLIST
LFIHS---
DNEHFFEND
FITIETOEKNOWKNEE
TOENEETONY
FAITOE---
MINMITTMOATNOTENODE
TOENDTONED
NIHMT---

This gives us a word from each of the 7 sets of 5 words. These 7 words themselves form another phoneme ladder.

Extracted phrase from added sounds
CABBYTABBYTOBYTONYTONEDTENDFEND
TOENDEHFTONE-DEAF
KAHBEEOET---

Extracting a single phrase from this new phoneme ladder gives us TONE-DEAF.