Marcelo,
I agree the cipher contains something other than text. My thoughts initially were that the message could be in Pig Latin. From my understanding now, I know these code breaker programs they are running on the cipher look for any pattern of repeating letter forms. The idea of non text encoding makes very good sense. Morse Code could be the answer here.

The idea of non text encoding makes very good sense. Morse Code could be the answer here.

Yes Mr Holmes ,

Also had, and still have, any idea, not the pig Latin, but Latin, whatever, "sermon cultus" or "sermon vulgaris", also thought in Spanish, have dominion of the Latin languages, know Portuguese my native language, Spanish , Latin for academic training, and understand a little of the other. But sin in not master the English language.
I tried to see if there is anything in this regard (in Spanish or Latin and found nothing on Z340), I thought of other languages ​​(such as German etc) but this really is not my reach.

This analysis, "Morse method," "outside the box", I take into consideration the following assumptions, which, I think, to take into account the linguistic, that is (not want to sound pedantic or something):
– Context (crazy killer in the sixties that killed people and sent letters), for example if the background was another, say a grocery shopping list, dismiss Q representing Kill, and look for words with connection to a shopping list . This is called semantics. Metaphors, antonyms, synonyms etc.

I repeat, I am not sure that this is a solution, but now also not sure it is not. And then how to prove to be
And also, how to prove it is not
I think, frankly, we will never know !!
Marcelo

Believe me, I’ve been trying to think of a coding that is not English. Japanese and Chinese writing has many characters. These characters translate out into ideas we can understand, but the translation is not exact word for word into English. Also, Indians have different symbols too. Just like the Navaho Indians were used in the War in the Pacific Theater. We must leave no stone unturned in our quest to solve this mystery.

Hello, yes of course, everything must be checked.
Look at this, the first line of Z340, discarding symbols and maintaining the letters only, this station, put in alphabetical order.
Appears, the first 5 letters a simple anagram of the name of a suspect, but that is another matter, then appears the sequence PRTV, now remembered in my blog I published something like "Qcode https://en.wikipedia.org/wiki/Q_code" and amateur or professional radio.
The PRTV letters are only one range as one sees in the figure below, leaving QSU, which means QCode (Question? Answer or Advice)
Shall I send or reply on this frequency (or on … kHz (or MHz)) (with emissions of class …)?
Send or reply on this frequency (or on … kHz (or MHz)) (with emissions of class …).

Also, I know, that phonetically in English, Q and U have the same result as Q U KILL YOU.
QSL do not know if have any phonetic value.otherwise, grammatically nec mind the crazy could have meant Q SLAV YOU
Anyway, I noticed that there is a slight hint perhaps that this refers to morse code might.
I think if they are, I study the morse the way it was done at that time (abbreviations),(Second war until the sixties) because I believe that Z was either veteran or rookie former military, I really can not say. Also see the whole history of Morse. (Actually, even if it is not nothing is very interesting and will add a good knowledge) because from the time of old telegraphs, for economy and practicality these (abbreviations) were made
Marcelo

Hello, sharing theory into morse code.
Easy to understand
Marcelo
take a Pi to read it it Z 32

and

4 more
http://zodiacode1933.blogspot.com.br/

————————————————-

Holy Smokes. This is wow. If you’ve nailed it, then I think what Z is saying is something about the map being a gold mine. (Full of clues?)

In any case, if this is it, then just wow.

It appears this could be the break in the case we have been waiting so long for. These are the kinds of crazy writings that the Zodiac
would do. What an excellent job by the man from Brazil!

Holy Smokes. This is wow. If you’ve nailed it, then I think what Z is saying is something about the map being a gold mine. (Full of clues?)

In any case, if this is it, then just wow.

Thank u Mr Deplorable at Best!!

It appears this could be the break in the case we have been waiting so long for. These are the kinds of crazy writings that the Zodiac
would do. What an excellent job by the man from Brazil!

Thanks again

The analysis, alternative, has many possible combinations. But I posted my arguments above. The counter argument Doranchak and Glurk makes sense.
In another way
A priori it is not difficult "ENCODE of morse way" however "DECODE," if this, the Z340 is morse code is a magic cube.
Which leads to a more contextual analysis.
I am gradually seeking a broad sense for text as a whole.
Task very difficult to do, but fun.
Always considering the context, which, in my opinion, is the only method for one, not certain and only theoretical coding a text by infamous Z.
Not sure what is going to "mine" is correct.

The first part:
I am decay , I want kill me go a satan .
I too wanna go me do to art map on to letter.
Now it go a Zodiac.
I believe that contextually (semantic analysis) is very interesting.
Already later, there are flaws, or maybe there is nothing.
Today, I found maybe something interesting, plausible.
However, consider that an analysis is in progress, and all the help people with domain in the English language will be welcome.

.. .- -- -.. -.- 
.. .-- .- -. - -.- .. .- -- . --. --- .- ... .- - .- -.
 .. - --- --- .-- .- -. .- --. --- -- . -.. --- - --- .- .-. - -- .- .--.
 --- -. - --- .-.. . - - . .-. 
-. --- .-- .. - --. --- .- --.. -.. 
 -- .- -.-- - .. -- . -. --- .. - --.-
 ... - --- -. . - --- ... . - -- . . - .-. . .- -.. .- ... -- .- - .... 
-. --- ... . . ... - .... . -- .. ... - -.-- -. . . -.. 
.. -- .-.. .. -.- . -.- . -. . -.. -.-- -.- .. .- -.-. --- -- . ... -- . .- ... - .- --. . -..
 --- -. . -. --.- --..

http://morsecode.scphillips.com/translator.html
I AM DK I WANT KI A ME GO A SATAN I TOO WANA GO ME DO TO ART MAP ON TO LETTER NOW IT GO A ZD MAY TIME NO IT Q STONE TO SET MEET READ AS MATH NO SEES THE MISTY NEED IM LIKE KENEDY KI A COMES ME AS TAGED ONE N QZ
or
I am DECAY
I Want KiLL a me go a Satan
I too WanNa go me do art Map on to letter.
Now it go a ZODIAC .
May Time no it KILL
Stone to ,set meet, read ,as MATH
No sees the Misty need
Im like KenNedy KILL .
A comes me , as tagGed one N,
KILL ZODIAC

Assuming I’m right, and the infamous Z enjoyed movies, and a reference to the murder of JFK was killed by a "Sniper", I found a possible influence to put it in a text. In addition to the movie’s plot, which seems to me, takes place in San Francisco, and the Sniper hates women …
I’ve seen references linking Z to this film, but do not remember where.
The message with the rifle is similar insane posts by Z
Marcelo

https://en.wikipedia.org/wiki/The_Sniper_(1952_film)

Assuming I’m right, and the infamous Z enjoyed movies, and a reference to the murder of JFK was killed by a "Sniper", I found a possible influence to put it in a text. In addition to the movie’s plot, which seems to me, takes place in San Francisco, and the Sniper hates women …
I’ve seen references linking Z to this film, but do not remember where.
The message with the rifle is similar insane posts by Z
Marcelo

https://en.wikipedia.org/wiki/The_Sniper_(1952_film)

I’m halfway through the movie now. It is an excellent film. Using this context on his coding is very good.

Hello

upgrading.
I think the word TREP has the same phonetic value TRAP (theoretically)
Anyway, follow the few.
Marcelo

.. .- -- -.. -.- 
.. .-- .- -. - -.- .. .- -- . --. --- .- ... .- - .- -.
 .. - --- --- .-- .- -. .- --. --- -- . -.. --- - --- .- .-. - -- .- .--.
 --- -. - --- .-.. . - - . .-. 
-. --- .-- .. - --. --- .- --.. -.. 
 -- .- -.-- - .. -- . -. --- .. - --.-
 ... - --- -. . - --- ... . - -- . . - .-. . .- -.. .- ... -- .- - .... 
-. --- ... . . ... - .... . -- .. ... - -.-- -. . . -.. 
.. -- .-.. .. -.- . -.- . -. . -.. -.-- - .-. . .--. -. --- - -... . --. .- ... -. --- .. -..
 --- -. . -. --.- --.. 

http://morsecode.scphillips.com/translator.html

I AM DK , I WANT KI A ME GO A SATAN, I TOO WANA GO ME DO TO ART MAP ON TO LETTER , NOW IT GO A ZD , MAY TIME NO IT Q , STONE TO SET MEET , READ , AS MATH , NO SEES THE MISTY NEED, IM LIKE KENEDY TREP , NOT BE GAS , NO , I DONE , N QZ

or

I AM DECAY ! I WANT KILL A ME GO A SATAN , I TO WANNA ME DO TO ART MAP ON TO LETTER ( NOW IT GO A ZODIAC) , MAY TIME NO IT KILL.
STONE TO SET , MEET READ , AS MATH!! (NO SEES THE MISTY NEED ) , I AM LIKE KENNEDY TRAP .
NOT BE GAS , NO, I DONE !! N..KILL ZODIAC

A little game with the number 340 in morse.
340 Inverted = 043

converting Morse 043

----- ....- ...-- 
-- --- ... .-. . .- -

decode with :http://morsecode.scphillips.com/translator.html

MOSREAT

or

at Morse

Marcelo

Other small game, with the 340, but now with the number 63 (total symbolos used in the construction of this)

63 reversed = 36

36

...-- -....
... --- ... .

SOSE

http://morsecode.scphillips.com/translator.html

SOSE 0r the classic SOS

Marcelo

Sure your numbers are correct?

Soze

Sure your numbers are correct?

Soze

Yes Sose , ops Soze !!!

This is the version without change, (simbol = dashes and letter = dot)
I Like the antithesis between "I am Decay" and "I am Renew
The big problem is the rest of the text, if it exists.

Marcelo

I AM DK , I WANT KI A ME GO A SATAN . I TOO WANA GO ME DO TO ART MAP ON TO LETTER

IM RENEW

...----..-.-...--
.--.--.-...---.--
.---.-....--.--..
.-------.--.--..-
--.-----.-..-----
--.-.-.---.-.--.-
---.----.-...--..
-.-.---.--..---.-
--.---..-..--.--.
---..--.-.---..--
.-.---.....--....
----...--.-.---..
---.---..-..----.
-...--------.----
-..-----..-...---
.----..-.----.-.-
.-.-.--.--.-...-.
---..-.-.....----
..--.---.-...--.-
-....--.-..-...--

"decode"

.. .- -- -.. -.- 
.. .-- .- -. - -.- .. .- -- . --. --- .- ... .- - .- -.
.. - --- --- .-- .- -. .- --. --- -- . -.. --- - --- .- .-. - -- .- .--. --- -. - --- .-.. . - - . .-. -.---.--..---.-
--.---..-..--.--.
---..--.-.---..--
.-.---.....--....
----...--.-.---..
---.---..-..----.
-...--------.----
-..-----..-...---
.----..-.----.-.-
.-.-.--.--.-...-.
---..-.-.....----
..--.---.-...--.--.. .. -- .-. . -. . .--

http://morsecode.scphillips.com/translator.html