[WIP] MIDI To RetroStudio [All Eras]

[autumn hamlet]

yes, also with playback

some midis just refuse despite everything going "right"

[neat bramble]

It refused to import a midi file for me once because of the name

Hmm idk

Well still this is a pretty cool feat of engineering!!

[autumn hamlet]

thanks, I just applied all the bitwise knowledge I got from working on the nes emulator

[neat bramble]

6502 in retrostudio is crazy

[autumn hamlet]

I mean https://www.masswerk.at/6502/6502_instruction_set.html

[neat bramble]

Yup I've seen that

I was working on my own 6502 emulator which I abandoned

It's not difficult in traditional programming languages, but block coding ?

How was the memory space even treated. Did you just have a big ass table

[autumn hamlet]

yeah the table initially contains just zeros, but as the addresses get accessed/written to it gets populated with sub-tables containing the bits

[neat bramble]

YOUR BYTES ARE ALSO TABLES?

Unhinged

I mean it's probably faster in some areas

But the memory usage. Yikes

[gleaming wedge]

What’s this do and used for ?

Oh music

[neat bramble]

This is a midi player, in other words, it plays music based on "notes" like how you'd expect from written music

[autumn hamlet]

I haven't figured out how to handle it with just base10 yet

[gleaming wedge]

Sick

[neat bramble]

A midi file is basically just a note sheet, but it supports different instruments and tempo and volume and whatnot

[autumn hamlet]

I've been thinking through some possible ways that I can just stay in decimal space and only convert to bytes when needed, but no real solid implementations

[autumn hamlet]

basically instructions to make music

[neat bramble]

Because it's different from roblox audio, you can import a lot of complicated and even copyrighted tracks (if you find the right midi), however that does come with its limitations as the choice of instruments and amount of notes is limited

[neat bramble]

Why not just use numbers

[autumn hamlet]

bitwise shifting and bitwise and/or

[neat bramble]

You can write your own basic bit32 library, it's not extremely difficult with just decimal numbers and a bit of chatgpt or your own research

Most functions can be implemented with shockingly simple decimal math

[autumn hamlet]

I attempted to do that

It just told me it wasn't possible

[neat bramble]

That's how I did it for some of my own almostlua projects that used bit32

[autumn hamlet]

lol

also this isn't in 32 bit since this is an 8bit processor

[neat bramble]

I was using bit32 as an example

You can adapt it to your needs obviously

[autumn hamlet]

the problem is also in regular programming languages you can manipulate the bits of a number directly

you can't here

[neat bramble]

For example, shifting a byte to the left is effectively multiplying it by 2

[autumn hamlet]

yes I know that one

[neat bramble]

Unfortunately

To get a bit, you can shift the number right as much as needed for the bit you need to be rightmost, then mod 2

[autumn hamlet]

for shifting right it's just floor(b/2^x) right

[neat bramble]

Yea

[autumn hamlet]

the issue is what if it's in the middle of the byte

or if I need to get multiple bits

[neat bramble]

Then you shift the number right as much as needed for the middle to be in the end

[autumn hamlet]

what about the MSBs

[neat bramble]

Ie you have 127 which is 0100 0000 and you want to check if the 7th bit is enabled
You can shift it 7 times to get 0000 0001, then you 1 % 2 == 1 to get that the bit is enabled

[autumn hamlet]

I think the most I can really do is bitwise shifting here

[neat bramble]

For bitwise and, you can repeatedly shift both numbers and get their modulo and assemble the result as you loop

[autumn hamlet]

oh wait

OHH WAIT

HEHEHEHE

shift left and then modulus

[neat bramble]

Well right

But yea

function band(a, b)
    local result = 0
    local bit = 1
    for i = 0, 31 do
        local a_bit = a % 2
        local b_bit = b % 2
        if a_bit == 1 and b_bit == 1 then
            result = result + bit
        end
        a = math.floor(a / 2)
        b = math.floor(b / 2)
        bit = bit * 2
    end
    return result
end

This is for 32 bits but it should give you an idea

It just constantly shifts both numbers right and gets their modulo

[autumn hamlet]

what's with the a and b

[neat bramble]

hmm?

[autumn hamlet]

oh wait a second

oh that's neat

I like that implementation

[neat bramble]

I just asked chatgpt to generate it and manually read it to make sure it's correct

Can't be bothered writing anything myself atm hehe

[autumn hamlet]

Yeah I figured ts out without chatgpt because it just flatout said fuck you I'm not telling you shit

[neat bramble]

Understandable

For bitwise or, same logic but you replace the and with or

For bitwise not, only iterate through one number

Although I think that can be optimized

[neat bramble]

Or just 255 - byte

Very fast very cool

[autumn hamlet]

oh wait true

[autumn hamlet]

that implies the number is exclusively 8 bit

I'll probably need to put a check in

[neat bramble]

2^(bits)-1 is the formula for the maximum value

[autumn hamlet]

yea

[autumn hamlet]

I think the bitwise using decimal might actually be slower

[neat bramble]

Depends

Math operations are faster than table lookups

The difference isn't too big to matter though

[autumn hamlet]

but by how much

[neat bramble]

do 100000 table lookups and 100000 math operations and benchmark that

or i can do that for you

[autumn hamlet]

ok cool at least pulling the number is faster

even if I will have to convert to binary tables for some instructions I can definitely use this to speed things up

[autumn hamlet]

I'm insane I managed to do the entire operation in one solve equation

[neat bramble]

Scary

[autumn hamlet]

I kinda cheated by making a sub-function that just replaces the values of num a and b with math.floor([a|b] / 2)

[neat bramble]

| standing for bitwise or?

[autumn hamlet]

I'm just saying I did it for both a and b

Didn't want to write math floor twice

[neat bramble]

Ohhh

That confused me but makes sense I guess

[autumn hamlet]

Yeah I ended up typing more just to explain why I typed less lmao

[turbid herald]

does it support all 128 instruments

[autumn hamlet]

maybe??

half of the instruments kinda suck

[regal atlas]

importing a 255 kb song

💔💔

[turbid herald]

my midi

[autumn hamlet]

https://tenor.com/view/burn-elmo-pyro-burn-it-down-ashes-gif-7510700295202730251

I got autohotkey running on linux, which means I can now make a new helper application which will directly convert midi files to json

and then the json can be imported

[autumn hamlet]

[WIP] MIDI To RetroStudio [All Eras]

[autumn hamlet]

ported a midi parser javascript library to autohotkey because why not

[wintry dune]

the midi importer doesnt create any midi and also uh

[autumn hamlet]

Yeah don't use it right now

[wintry dune]

rip

[autumn hamlet]

The next version won't be using a wack ass encoding system and should support more midi files

[wintry dune]

cool

[eager pelican]

@autumn hamlet Always making me the day with a model

[autumn hamlet]

?

[eager pelican]

Don't you get it...

[autumn hamlet]

No I don't

[eager pelican]

How can't you, im saying you always make my day better with a model

[autumn hamlet]

O

[autumn hamlet]

Going to just write my own midi parser again, all of the midi 2 json libraries are shit lmao

[chilly crow]

i made a stupid reply

[autumn hamlet]

Could I make something like what

[chilly crow]

so basically

i was gonna ask if you could make it like "Gamehero's Midi Keyboard" which is basically just a roblox midi player that uses base64 instaid of json

[autumn hamlet]

The previous version was basically that

But it takes forever to parse in-game

[chilly crow]

ah

[autumn hamlet]

Yeah, trying to make parse the information outside of the client and then sending it

[fossil grove]

help

i keep getting an error when trying to import this plugin

[neat bramble]

what's the error

[fossil grove]

it just doesnt want to import

[neat bramble]

what do you mean

how exactly are you importing it

what steps do you take

[fossil grove]

i just import it by the model code

tru tools

[neat bramble]

tools you mean manage plugins window?

[fossil grove]

yuh

[neat bramble]

this was made before plugins existed

you need to import it the original way

through the import tab

[fossil grove]

im using this btw

[fossil grove]

oooh

okey

[autumn hamlet]

I do not support the previous versions that are available as I'm working on a new version which will use the new plugin system for importing

If you get it working, gg

[fossil grove]

yay

[fossil grove]

i dont really know how to code, so i cant

i learnt some c# a couple years ago

at least ive got the logics and basics in my head

[autumn hamlet]

https://tenor.com/view/oh-yeah-its-all-coming-together-kronk-the-emperors-new-groove-gif-15921603

[limber raft]

wow

[eager pelican]

Wowzers

[fair prawn]

finally i can put srb2 midi ost

[autumn hamlet]

not yet you can't

[fair prawn]

ok

when it gets finished

its srb2 midi time

[neat bramble]

sure is a midi file

[wicked bolt]

a

[regal atlas]

💔

[autumn hamlet]

Yeah don't use this version lol

[regal atlas]

The ID you provided

Only has the importer

[autumn hamlet]

Yea

I'm rewriting it

Basically don't use the older versions

[south night]

please dont even abandon this pipedream

[autumn hamlet]

I have too much going on rn to work on this but I will

[obsidian path]

the people of retro dev need their MIDIs

[lunar trellis]

YOOOO GREEN THE OGG

NO WAY

[autumn hamlet]

green.ogg

[autumn hamlet]

and MIDIs they shall

[plucky wadi]

woohoo

[lunar trellis]

green.ogg

[regal atlas]

@autumn hamlet [;easseeeeee

revive this

[autumn hamlet]

eventually

[regal atlas]

alr

but what version can I use

idc if it's old

just something that works

@autumn hamlet alr how do I change the istruments of a song

or force a song to use custom instruments

using the newer version

[autumn hamlet]

I don't remember lmao

[regal atlas]

oh god

this is what happens when you abandon something for too long

lmao

[autumn hamlet]

I still have a js module I ported to AHK

[regal atlas]

did you even spend any work on the new version

just asking

[autumn hamlet]

yes but I'll have to rewrite it

[regal atlas]

ah

how does the new version work?

does it work similar to the old one

[autumn hamlet]

It was going to be similar yes, but would support more midi versions

[regal atlas]

wdym by midi versions

like formats?

.mod?

[grizzled obsidian]

how does this work

[hollow bay]

MIDI tomorrow ⚠️

[autumn hamlet]

mod isn't a midi

It's sequenced music yes but not midi

[regal atlas]

mbb

I was so fucking dumb when I sent that

MOD files use sound samples for instruments

although they both have similar instructions system

[autumn hamlet]

the previous version of the importer exclusively supported type 1 midis

[regal atlas]

the way how they executes instruments

are way different

MIDIs will use a set of instruments usually a soundfont file.

[autumn hamlet]

Microsoft GS wavetable on fleek

[regal atlas]

A .mod file is a hybrid audio format that contains both digital audio samples and a set of instructions called patterns to sequence them. A player reads these patterns to play the samples at specific times, pitches, and volumes, while also applying effects like vibrato or panning. The song structure is created by arranging these patterns in a specific order, known as a "pattern list".

e

[autumn hamlet]

ok Wikipedia vro

[regal atlas]

mbbbb

https://cdn.discordapp.com/attachments/1335405974596620361/1343580560223637556/attachment.gif

but we should get a .mod player in retrostudio /satire

[autumn hamlet]

I tried

[obsidian path]

woa

ik it's old but still looks cool

[undone steeple]

how do i convert mp3 to midi

rigged

[autumn hamlet]

That is a completely different problem

[acoustic marsh]

why did it load only 4 tracks and not the rest which is 11

piss

[autumn hamlet]

because it bronk

[acoustic marsh]

Lol

[eager pelican]

Fix it

[autumn hamlet]

I'm in the middle of a rewrite

[eager pelican]

Ok hurry up

You don't want my patience to run out

[autumn hamlet]

I'm sorry to inform you but your impatience will not accelerate its development

[eager pelican]

Ohh you don't wanna know, oh the horror

[autumn hamlet]

I have to both develop an ingame import pipeline as well as write an external application to assist in sending it to retrostudio

[acoustic marsh]

its alright i can wait

[plucky wadi]

[covert depot]

Oh heck yeah it's nice to know this is still being worked on

I was just checking in to find the model code for the latest release :D

[acoustic marsh]

im still waiting

[autumn hamlet]

I'm afraid to say it's been pushed way back in my list of things to do, but it is not dead

[lean hare]

is this very laggy atm?

[covert depot]

nope

[autumn hamlet]

it's just very difficult to set up

[regal atlas]

dead tool

dead tool 2.0

deal tool 3.0

deal tool 4.0

dead tool 5.0

dead tool 6.0

dead tool 7.0

dead tool 8.0

dead tool 9.0

dead tool 10

[ashen fable]

dead tool 11

[rigid schooner]

dead tool 11.5

[plucky wadi]

dead tool ~4pi

[eager pelican]

dead pan

[autumn hamlet]

alive tool

[covert depot]

so alive and well and it works too

[acoustic marsh]

this model is like a sick man

is he gonna die or is he gonna recover