social.noyu.me

well you see, a “piano” has 1 polyphonic channel with 88-note range, velocity, and 3 controllers, whereas a “guitar” has 6 monophonic channels each with its own circa 24-note range (staggered and overlapping), velocity, pitch bend, polyphonic aftertouch, and uhhh many controllers

oops i meant channel aftertouch, polyphonic aftertouch is meaningless in this context

but you know what has 16 polyphonic channels with 128-note range, velocity, pitch bend, channel aftertouch, five controllers, and 128 different programs?

that's right: a General MIDI System Level 1 compliant tone generator.

but this is a shitpost, this is unfair to guitars

i think part of my wonder at the guitar is it is just impossible to model as a midi instrument. i mean, you can try. midi guitar controller systems exist. midi guitar synthesisers exist. but every single one is but a shadow of a real guitar, the inescapably physical instrument

hell, even a piano can only be modelled by midi by assuming you play it “correctly”. if you open the lid and directly play with the strings, that's considered cheating or something

@hikari MIDI is more about digitally recreating a score, rather than a performance, I feel. There are a lot of subtleties when it comes to playing an instrument, any instrument, which are not really part of the composition, but are important during performance.

That said, the piano played in a normal way must be one of the least expressive mainstream instruments we have. And therefore also one of the easier ones to model in software.

@Tijn unfortunately i can't agree with this, MIDI is a radically different thing from sheet music and has always been designed and used to capture and reproduce performances, not to replace scores; it is fundamentally unsuited to the latter

@hikari I get what you mean, but don't you agree that when it comes to what data MIDI records, it's more in line with what's in a score than what is going on between the player and the instrument?

Like, when a violinist plays a piece, the score just says which notes to play in what tempo, at what volume. MIDI does offer a bit more possible parameters, as do scores btw, but it remains a very coarse description of what's it actually like to play the piece.

@hikari What a violinist is concerned with is the angle of the bow, how tight the grip is, how much pressure is applied with the left hand, etc. Tons and tons of details and subtleties that the performer is conscious of and are crucial to how the end result sounds, none of which are typically part of a MIDI file or a score.

@Tijn MIDI data for a synthesiser would precisely recreate every detail of a performance. this is also the case for MIDI data from a player piano.

for a violin, well, a sufficiently advanced performance capture system ought to capture the details you describe. it's just hard

@Tijn even in the simplest case a MIDI file is still a performance and not a score. timing and expression are conveyed precisely, there is no room for interpretation. trying to turn a score into a MIDI performance requires interpretation, as does the reverse. now, you can make a very spartan and uninspiring MIDI for a beautiful idea, but that also exists for audio recordings, we call those sketches or demos

@hikari Yeah, this all came from the observation that piano and most synthesizers offer very few expressive features.

Which is also why MIDI is so compatible with those kinds of instruments, and many other types of instruments remain awkward and difficult to turn into digital recreations to this day.

@Tijn MIDI can offer a lot of depth of expression, but it's very hard to figure out how to represent that for an instrument where a human directly interacts with the strings. for a synthesiser it's trivial because the control surface is already digital

@hikari yeah, that was exactly my point all this time really. Me saying MIDI is more like a score is mostly about what sort of data a typical MIDI file contains: information about pitches, timing and velocity, which is very high level and far removed from what it's like to actually play most instruments.

You're right it's possible with elaborate controllers and extra CC data to capture all sorts of things in MIDI, so in theory the possibilities are endless.

@Tijn i apologise for arguing about it, it's just a personal bugbear from having seen first hand how badly it represents sheet music and vice-versa

@hikari hey no worries :)