The KORG Gadget for the Nintendo Switch comes to mind for me. I kinda like the idea but I’m not sure if it would be fun to control these synths on the Switch.
Also I never looked too deeply into it myself but I’m fairly certain that somebody’s youth was spent entirely covering songs with Minecraft note blocks.
Does Otocky count? It’s similar to Fluid that the gameplay is directly correlated to musical pitches, so playing as the character feels abstractly similar to playing an instrument. The difference is that it doesn’t have a more pure DAW-style music-building mode the way Fluid does. Not sure which of these things qualifies Fluid and if it would disqualify Otocky.
EDIT - I totally forgot it does have a music sequencing mode! Put 'er on the list!!
it’s an abstract walking sim/puzzle game where you’re basically put into a giant synthesizer and have to get it working again. as you do, the environment fills up with music and you unlock more instrumental tracks and effects you can use to compose in the game’s central hub. i never finished it, but it’s a really striking game.
The music making mode of Groove Jikoku V is great. The fact that the nonsense minigames are played with the end purpose of spending money in gatchas to unlock different samples makes all of the time wasting somewhat fruitful.
The actual music-making element is quite engaging and smooth to control, I find myself pretty easily getting into a groove and having fun. There is an imaginary world with massive troves of songs people recorded with it.
Really bummed the music maker aspect was lost on the psp version.