I figured out the title I think!!!!
"Boxes of boxes"
If you take all the notes given:
Which solves to this:
I know my answer still isn't making use of the red markings, so I'm not sure this is right, but it was fun to do!
EDIT: Gareth McCaughan figured out the title was
by combining the marked notes with the sudoku grid (Thanks Gareth! And anyone ...
If we continue from MMAdams' discovery (if you like anything in this answer, go upvote MMAdams'!) and
we get the following pattern:
This, if you squint at it a bit, says
which also (note: the following contains a slightly spoilery conjecture about the metapuzzle)
Another partial answer because I can't comment
The image's alt attribute is aoPrk, so going to https://i.stack.imgur.com/aoPrk.png, we see the order of the qr codes.
Plugging in the decoded words from R.M's answer, we see
No clue where to go from here.
Just to show what can happen when important ciphers get into the wrong hands,
a partial decryption suggests that
if Jack and Dave were me, what they would do is look for a lawyer.
What were Jack and Dave thinking!, entering dance bars with A minor.
Time to face the music.
Apologies to anyone unfamiliar, or too familiar, with music theory,
and to the ...
The two anagrams at the top of the score are the keys to this puzzle:
The first clue gives us three of the song titles:
Ignore the rests — they are just there to pad out each bar to the required length. If you count the number of semiquavers in each note or cluster of tied notes, then convert them to letters of the alphabet (A=1, B=2, etc.), ...
Not a solution, but here's a conversion of the image to text, to make this puzzle accessible to the blind. :)
Doing a Fourier transform on the scan from the newspaper gives us this in the lower left corner:
text: I IV VII C 1 5 11 AV BS CG DL FU NZ IX KM OW RE START:WXC MSGKEY:KCH
These are clearly settings for an Enigma Machine:
Putting the Morse transmission from Matt's post through an Enigma machine with these settings we get
or more readable:
Thus your ...
Some possible answers...
4 Across: Flickering flare (9)
7 Across: What philanthropists do with money (18)
16 Across: Almost all my Cards are Spades, Clubs, and Diamonds (3)
19 Across: "Johnny, your sheets smell terrible!" (7)
20 Across: Wounded by passion (8)
25 Across: You disturbed me from dusk 'till dawn (4)
26 Across: Evaluating the pros and cons ...
For Chopin (thanks Jason)
Made with MixIn
Composed by Mei O. (thanks Volatility)
BETWEEN this bar ... [OR] this bar?
From hint given by OP
My 16th artwork
More... * the accents - C, C, G, D, E, and B, D, GBDG chord near the end - what does the asterisk symbolize?
Image of full score ...