Thank you, but my question is specifically about the sound commentary to the light show, not a general tour

Sorry suggest you email

The show is only available during the summer and the Christmas holidays. The time moves based on when the sun is setting. When we went it was 11pm. I beleive it starts a little earlier now. The tourist office located right next to the Cathedral will have the time. Please note, even the tourist office acknowledges that the show starts late most evenings. Definitely worth waiting for. The cool thing is at the end of the light show, they leave the cathedral lit up like it was painted hundreds of years ago. (yes, all the great cathedrals were once painted!!!)

Free admission

8.30 till 18.30 (summer hours) all the days - the info from official site (unfortunately only in French)

There is a tour that takes you up there and you need to check with the ticket office and shop to the immediate left of the Cathedral. Google Amiens cathedral Tours for more. Don't miss it.

We were staying in Amines and got the train to Paris for a day it's very easy to do. So yes would be easy for you from Paris to Amines

Dal 21 giugno al 21 settembre la sera alle 22.