NOTATIO

I wonder what notational software is used here?

https://twitter.com/LPOrchestra/status/ ... 0845017090

It is a rather fascinating and clever short video from the London Philharmonic Orchestra showing what is going on in the score during the first two minutes of the second movement of Brahms's 4th Symphony.

From it's font it is definitely Sibelius

I concur with odod, most definitely.