Question

I think the sheet music management could be improved. E.G. Directories in
iCloud are ignored and an "tag" feature would be cool. After I do dance
music it would be cool if I could my Tunes with "Valse", "Mazurka",
"Scottish", "Polska", "Bourree 2 temps"... And filter for this tags and the
home screen :)

Answer 1

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Answer 2

I agree entirely

My current workaround for this issue is to rename the Notion Files (the title screen) with an indicator like so:  
Valse - Vienna Woods
Valse - Blue Danube
Scottish - Loch Lomond
Mazurka - Opus 17, No. 4: Mazurka No. 13, in A minor by Chopin

Then I sort by A-Z and all like items are grouped together