Causative passive form vs. Passive causative form: Both are grammatically possible, but is there a citation to prefer one over the other?

Question

The "causative passive" form is very well documented. It's easily made possible because the a causative verb is a valid ichidan verb, and therefore compatible with the passive conjugation.

However, in the resources I have on-hand, there is nothing to suggest the inverse is commutative. To be specific, does a "passive causative" verb have a meaning equal to that of the "causative passive"?

Furthermore, is the "passive causative" conjugation ordering even used? Or is it unconventional?

Hypothesis

1. ❌ The conjugations have a commutative property ("causative passive" is semantically identical to the "passive causative");
   • ❌ This hypothesis is disproved on the basis that conjugation ordering matters. Thank you, @naruto !
   • ❌ Furthermore, the final component/conjugation suffix is the main function of the verb. Thank you, @aguijonazo !
2. ❌ The "causative passive" is euphonically preferred (「聞かせられる」 is easier to say and more pleasing to hear than 「聞かれらせる」 「聞かれさせる」);
   • Therefore the "passive causative" is unconventional and never used.
   • ❌ This hypothesis is disproved on the basis of being dependent on the first, disproven, hypothesis. This hypothesis doesn't have a leg to stand on! Thank you, @Jun Sato !

If my speculations hold true, then I'm seeking a citation to support these claims (which is actually the aim of this question).

Edit:

There was a typo (ら instead of さ), which confused some of the people who tried to help in the answers.

Answer 1

There is no "passive-causative form" as you suggest in Japanese. Japanese verb conjugations can be "stacked", but not all combinations are possible. There is a correct order you have to respect. If you want the causative-passive meaning described in your textbook, you must always use させられる, not られさせる.

• つまらない音楽を聞かせられた。(or ～を聞かされた)
  I was made to listen to boring music. (i.e., They made me listen to boring music.)
• 私は泣かせられた。(or 泣かされた)
  I was made to cry.

Sometimes, there are situations where you want to "make someone/something be in some passive state". Even in such cases, "passive-causative" られさせる is not a thing. Instead, you need to say ～れるようにする, ～れろと言う/命じる, etc.

• 音楽が聞かれるようにした。
  I let the music be heard.
  ^{(×聞かれさせた is incorrect)}
• 彼に殴られろと命じた。
  I told him that he must be beaten.
  ^{(×殴られさせた is incorrect)}

Answer 2

Your first hypothesis simply doesn’t hold. If you thought it might, you may not understand how causative-passives work.

If such a thing exists at all, the passive-causative form of 聞く would be 聞かれさせる, not 聞かれらせる. (A passive form is also valid as an ichidan, or Group-2, verb, and a verb in that group takes -させる to form a causative.)

If 聞かれさせる means anything, its main function would be that of させる, its final component. It would be understood as causing some situation that in turn is described with a passive. Order matters.

I can think of two imaginary usages.

(*) XにYを聞かれさせる。

(*) XにYに聞かれさせる。

The situation to be caused would be described as Yを聞かれる in the first and Yに聞かれる in the second. Either way, X would not be an active agent in this situation. (If X is the one who hears Y in the first case, you would simply say XにYを聞かせる.)

That means X would also have to somehow “cause” that situation indirectly. It’s like doing so on behalf of the speaker in the above sentences.

Such ideas can be expressed as:

XにYを聞かれるようにさせる。
I will have/make X see to it that Y is heard.

XにYに聞かれるようにさせる。
I will have/make X see to it that it is heard by Y.

Now, why would you need passive-causatives?

Answer 3

1. "The conjugations have a commutative property ("causative passive" is semantically identical to the "passive causative")

This would be categorically false. Can you throw me several examples you think it might work? (by commutative I assume it is meant like how addition is commutative, like 2+3=3+2, i.e. can flip orders)

2. The "causative passive" is euphonically preferred (「聞かせられる」 is easier to say and more pleasing to hear than 「聞かれらせる」);

As I commented above, I can defintiely tell that 聞かれらせる is - before it's easy on the ear or not - absolutely wrong. So regardless of where you are coming from - Hypothesis (2) does not have a leg to stand on, since it is assuming both forms are valid but one is preferred. That is not the case.

To list the examples posted here:

聞かせられる: Forced to listen to (against will).

聞かれらせる: wrong, can't even guess what it wants to say.

聞かれさせる: almost there, what you really want is 聞かさせられる. (reference])