Is reflecting upon a choir conducive to the path of Enlightenment?

The five basic precepts for laypersons tells one to undertake the training to abstain from:

• killing
• stealing
• sexual misconduct
• false speech
• substance intoxication

The eight precepts, which are the stricter version, tells one, in addition, to undertake the training to abstain from:

• eating at the wrong time
• singing, dancing, watching entertainment, cosmetics, perfume
• luxurious sleeping places and overindulgence in sleep

The eight precepts version is for laypersons who want to lead a more ascetic life.

So, if your question is generally about entertainment, then it depends on whether you wish to observe the five or the eight precepts.

Naturally, the eight precepts are more conducive to the path of Enlightenment, but we should not use this to forbid or discourage laypersons from watching entertainment. Laypersons are only discouraged (strongly) from the five (killing, stealing, sexual misconduct, false speech and substance intoxication).

The prose seems to come from The Gospel of Ramakrishna.

I am a learner, I do not know very much about suttas in deep but I have found the description of the question, very interesting (actually that choir/the wording). About a'nicca I read this on wiki. ' Impermanence is intimately associated with the doctrine of anatta, according to which things have no fixed nature, essence, or self. For example, in Mahayana Buddhism, because all phenomena are impermanent, and in a state of flux, they are understood to be empty of an intrinsic self (shunyata). ' I want to understand the question the way I have understood the three marks of existence.

No permanence, no satisfaction and no self BUT all these three exist. It can be taken as chaos or the choir. I think it is not the choir that inspire or energize you towards the path of enlightenment but it's the enlightenment that inspire/energize you to think about the choir this way. Regards

"But is it wrong to get energized or inspired by a choir, even if the inspiration is towards the path of enlightenment?"

In principle, I don't think so. It's quite reasonable actually to regard the verses in the suttas having that precise purpose (otherwise, why write in verses?). Additionally, many traditions do chanting.

"I know that even thinking about this is also a sign of attachment, as even those thoughts are impermanent."

Not necessarily. Inspiration does not entail craving, and feeling inspired is very important, I don't think anyone who have directed their lives to this path would be able to gather energy to do so without inspiration.

Moreover:

[...] and he gains inspiration in the meaning, gains inspiration in the Dhamma, gains gladness connected with the Dhamma. When he is glad, rapture is born in him. in one who is rapturous, the body becomes tranquil; one whose body is tranquil feels pleasure; in one who feels pleasure, the mind becomes concentrated.

-- Vatthūpama Sutta, MN 7

also:

This was said by the Blessed One, said by the Arahant, so I have heard: "Endowed with two things, a monk lives in ease in the present life and is appropriately aroused for the ending of the fermentations. Which two? A sense of urgency & awe toward things that should inspire urgency & awe and, feeling urgency & awe, appropriate exertion. Endowed with two things, a monk lives in ease in the present life and is appropriately aroused for the ending of the fermentations."

Feeling urgency, awe / toward what should inspire it / the wise, masterful / ardent monk / should investigate / with discernment. / One who lives thus / ardently / not restlessly, at peace / committed to awareness-tranquillity / would attain the ending / of suffering & stress.

-- Iti 2.10

However, as we know, it's not always like this:

Bhikkhus, have you not known me to teach the Dhamma in such a way as this: ‘Here, when someone feels a certain kind of pleasant feeling, unwholesome states increase in him and wholesome states diminish; but when someone feels another kind of pleasant feeling, unwholesome states diminish in him and wholesome states increase [...]?" — "Yes, venerable sir."

-- Kīṭāgiri Sutta, MN 70

By "inspiration", we are presumably talking about, say, something that acts as a vehicle to something else. But when it ends in itself, that is just sensual delight:

And what, bhikkhus, is the nutriment for the arising of unarisen sensual desire and for the increase and expansion of arisen sensual desire? There is, bhikkhus, the sign of the beautiful: frequently giving careless attention to it is the nutriment for the arising of unarisen sensual desire and for the increase and expansion of arisen sensual desire.

-- SN 46.51

In more detail:

"Monks, in whatever monk or nun there arises desire, passion, aversion, delusion, or mental resistance with regard to forms cognizable via the eye, he/she should hold the mind in check. [Thinking,] 'It's dangerous & dubious, that path, thorny & overgrown, a miserable path, a devious path, impenetrable. It's a path followed by people of no integrity, not a path followed by people of integrity. It's not worthy of you,' [...].

-- SN 35.205

That is, craving through the five aggregates.