# unnieversal

some VST plugins made in Rust using `baseplug`

source for the plugins are inside the `crates` folder. all plugins have only been tested on macos with reaper

disclaimer: i am not responsible for loss of work, time, sanity, or anything else if you decide to use these plugins

as of now no plugin has ui, so they all just have a few sliders with whatever look your daw gives them

## building a plugin

because steinberg is an incredibly nice company, i can't actually distribute vst2 plugin binaries without a license, which they don't give out anymore :)

so you're gonna have to build the plugins yourself, but don't worry cause it's relatively easy! (i think)

### macos

to build a plugin, first run:

```bash
cargo b --package package_name --release
```

Then make the generated dylib file into a VST plugin:

```bash
./osx_vst_bundler.sh PluginName target/release/libpackage_name.dylib
```

this will create `PluginName.vst` in the `build` folder. You can copy it into `/Library/Audio/Plug-Ins/VST` and use it in your daw

alternatively, you can run:

```bash
./macos.sh packagename
```

this will do all three steps directly for you

### other platforms

no idea what you have to do for other platforms, refer to the `vst-rs` [docs](https://github.com/rustaudio/vst-rs). i think you can just build with `cargo b --package package_name --release` and take the `.so` or `.dll`, but don't quote me on that

PRs are welcome for more build instructions

## plugin list

the following is the current list of plugins


- `basic_gain`: simple gain plugin
- `noted`: output midi at regular intervals
- `sosten`: granular sustain plugin
- `quinoa`: [WIP] granular synthesis plugin
- `XLowpass`: reimplementation of [Airwindows XLowpass](http://www.airwindows.com/xlowpass/)
- `multidim`: randomized midi note generator
- `robotuna`: automatic pitch correction
- `hysteria`: hysteresis nonlinear effect
- `threebandeq`: 3 band eq
- `threebandwidth`: 3 band stereo widener
- `tritu`: say-goodbye-to-your-audio distortion
- `threebandfolding`: 3 band wave folding distortion
- `double_reverse_delta_inverter`: idk, a weird distortion
- `transmute_pitch`: pitch to midi converter

there's a bit of an explanation of each of the plugins below, but it's not a thorough documentation or a manual, it's just a bunch of notes i've written and a short description of the parameters

### basic_gain

simple gain plugin, used as a template for starting new projects

### noted

midi retriggerer

parameters:
- `tempo`: how often to retrigger a note

it listens for incoming midi, and while a note is on, it triggers it every `tempo` beats. if `tempo` is one, it will trigger once per beat

it's useful when you want to play a note super fast (over 1/64 tempo) but don't want to have a section full of tiny midi notes. just add the plugin, set the tempo to how often you want it to play, and add a midi note that lasts however long you want the notes to play for

### sosten

sustains a sound by replaying a grain of sound on loop. small but versatile

parameters:
- `enable`: will enable the sustain if it's over 0.5
- `length`: length of the grain in samples. maximum is 48000 cause i said so
- `manual/pitch detection`: whether to use the manually set length (if under 0.5) or use the detected pitch (over 0.5)
- `dissipation`: amount of dissipation of the input
- `direction`: direction in which the grain is played

to use this plugin, add an automation for `enable` and set the value to `1.0` wherever you want the sustain to happen. as soon as that happens, it'll start looping the last `length` samples

if set to manual, it uses the provided length for the looped grain. if pitch detection is enabled, it will use the detected pitch to calculate the period of the input, and it'll use that for the length of the grain. this should cause the sound to be sustained seamlessly

dissipation is a weird thingy. it smooths out the sound, and i think it's a lowpass filter? not sure. makes cool sounds though. what it does is roughly `x[n] = dissipation * x[n] + (1 - dissipation) * x[n + 1]` after each time it plays a sample, so `dissipation = 1` will leave the audio untouched, and setting it to `0.5` provides the greatest effect

direction is a selector, with three ranges:
- `[0, 0.4)`: the grain will be played backwards
- `[0.4, 0.6)`: the grain will cycle through forwards and backwards
- `[0.6, 1.0]`: the grain will play forwards

my three main uses are: 
- sustaining a note, which you can do with `manual/pitch detection = 1`, `direction = 1`, and any amount of dissipation
- wavetable-ish kinda thing, by setting `manual = 0` and a really low length, you can play notes of frequency `1 / length`
- glitch repetition effect, by setting `manual = 0`, any direction (but usually forward), any dissipation, and a medium length. enable at the end of a bar or smth

but you can probably use it for more stuff! idk! this are just my suggestions

### quinoa [WIP]

nothing implemented yet, but it's supposed to be a granular synthesis plugin that does stuff with an audio file

since this needs a ui so we can select a file to play, and i still don't know how to do that, progress is kinda stuck

### XLowpass

XLowpass reimplements [Airwindows XLowpass](http://www.airwindows.com/xlowpass/) in rust. it's a lowpass distortion filter

parameters:
- `gain`
- `frequency`: cutoff frequency. it's not in hz, so move it around until it does what you want it to
- `nuke`: amount of distortion

i haven't checked correctly, but there's probably some mistakes and it might not sound exactly the same. it does what i want it to, so that's good enough for me. also i have absolutely no idea what the code does, it's just a direct translation

you might need to play with the parameters around a bit to get it to sound good

### multidim

multidim simulates a ball bouncing around in a 16-dimensional cube. each time the ball bounces off of a wall, a midi note is sent out

parameters:
- `speed`: speed at which the ball moves. around 1 should cause approximately one bounce per beat
- `root`: the lowest note that will be generated (in midi number). the rest of the notes will be from `root` to `root + 16`
- `note_length`: length of each note in beats
- `enable`: enables the generation if over 0.5

since some daws keep the plugins running all the time (whether the song is playing or not), this plugin will generate notes constantly even if the song is paused. since this gets annoying fast, i added an `enable` param. set it to 1 to make the plugin generate notes

### robotuna

WIP automatic pitch correction and pitch shifting. the intention is to use it to make hyperpop-style high-pitched vocals

it kinda works, but not really. since the pitch shifting part is too slow using a phase vocoder, it doesn't run in real time, and there's some clicking noises. i need to rework that whole thing so it can run in real time. i'll probably change the whole thing completely instead of optimizing it cause yeah

### hysteria

hysteria is a hysteresis nonlinear effect, which compresses and distorts the input audio

parameters:
- `drive`
- `saturation`
- `width`: width of the hysteresis loop

original source [here](https://ccrma.stanford.edu/~jatin/ComplexNonlinearities/Hysteresis.html)

turn the values up for loud and distorted. don't set them all to the max at once though, that doesn't sound as interesting

### threebandeq

simple three band equalizer

parameters:
- `low band`: frequency at which the low band ends
- `high band`: frequency at which the high band starts
- `low gain`: gain for the low band
- `mid gain`: gain for the mid band
- `high gain`: gain for the high band

low band goes from 0hz to `low band`, mid band goes from `low band` to `high band`, high band goes from `high band` to half the sample rate

### threebandwidth

three band stereo widener

parameters:
- `low band`: frequency at which the low band ends
- `high band`: frequency at which the high band starts
- `low width`: width for the low band
- `mid width`: width for the mid band
- `high width`: width for the high band

bands work as they do in `threebandeq`. the width parameters control how wide an audio signal should be in the stereo field. `width` of 1 leaves the audio as is, `width` of 0 makes it mono, values between 0 and 1 decrease the stereo width, values over 1 increase it.

### tritu

hard limiter followed by a soft limiter with distortion

parameters:
- `pregain`: pregain for the hard limiter
- `drive`: drive for the soft limiter
- `distortion`: amount of distortion on the soft limiter

distortion affects lower volumes more than higher volumes, so if you crank up `drive` a lot, there will be less distortion (this is a good thing for high values of `distortion`!). if you leave `drive` low and set `distortion` to max, your audio will turn to almost white noise

i like this plugin a lot

### threebandfolding

three band wavefolding distortion

parameters:
- `low band`: frequency at which the low band ends
- `high band`: frequency at which the high band starts
- `low folding freq`: folding frequency for the low band
- `mid folding freq`: folding frequency for the mid band
- `high folding freq`: folding frequency for the high band

bands work as they do in `threebandeq`. the `folding freq` parameters control the frequency of the wavefolding. higher is more distortion. use values over 40 if you want to hear white noise

### double-reverse delta inverter

weird kinda distortion that makes loud things quiet and makes quiet things loud

parameters: 
- `dry/wet`: dry/wet control

yeah there's not many params in this one, the implementation is pretty straightforward. it does weird things: a square wave of amplitude 1 will just be completely eliminated, while sine waves are distorted

the effect is reversible (it's an [involution](https://en.wikipedia.org/wiki/Involution_(mathematics))), so if you add this plugin twice in a row you get the original signal back. this means you can apply drdi to your audio, apply some other effect, and apply drdi again to get some fun stuff

### transmute midi

analyzes pitch of incoming audio and sends out the corresponding midi note

params: 
- `passthrough`: how much of the original audio to be let through

latency should be close to 1024 samples, which is around 20ms i think. the pitch detection is not excellent and it's monophonic, so if you have a noisy input or a bunch of notes at the same time it's anyone's guess what the midi output will be. there's also no pitch bending or anything fancy like that, so it'll jump around notes even if the input has portamento. 

aside from that, it works well enough on my quick tests

## contributing

issues and prs are welcome, but please open an issue before making any big pr, i don't wanna have to reject a pr where you have put a lot of effort on. if you are fine with that, ig go ahead i'm not your mum

## license

gpl3 or something, i need to check which one to use and the add the correct file

consider it gpl3 for now