vst-rs VS Symphonia

https://github.com/RustAudio/vst-rs this what you mean?

I hate to "uhhmm ackchyually" this, but unless you need native VST3 support* (which uses the C++ ABI directly) other options are available, a favourite of mine would be Rust!

VST2 bindings exist (https://github.com/RustAudio/vst-rs) but the VST3 and AU situation is rougher around the edges. There is work being done on abstracting over different plugin standards and easing parameter handling, notably https://github.com/wrl/baseplug and https://github.com/robbert-vdh/nih-plug, but nothing completely stable yet.

One limitation that they mention is "Only one GFX and one LFX APO can be registered for an output device and only one LFX APO can be registered for an input device." which could be a problem for people who are already using one like Equalizer APO. What you could do is make a VST version of your limiter using vst-rs and use Equalizer APO to handle the APO part.

I agree with the first half. For the second half, I think for beginners, the examples are very important. From this perspective, many Rust projects comes with examples:

https://github.com/RustAudio/vst-rs

Once following the readme, it is very easy to get it work in your own machine. Then beginners can edit things while learning new stuffs with books or online resources.

Rust audio has also got a very helpful Discord community where beginners can always ask questions.

For the GUI part, I am not an expert, but there are more and more Rust GUI libraries (egui, iced, druid, rui): among them, egui-rs and iced-rs can all be used for VST. Still, there are some examples to get started with.

https://youtu.be/yFKH9ou_XyQ

If you want your own vst (with your name on the author and you can sell),you can start with vst-rs:

https://github.com/RustAudio/vst-rs

Wanna some GUI, here is a template:

When I came across the vst-rs, I realised that I could try out writing an audio plugin. Since I was already familiar with FM synthesis from Elektron Monomachine and FM8, I decided to go with it. It has worked out pretty well.

Symphonia for an amazing audio library

Are you trying to play audio from something like an internet radio station where the stream has an infinite length? The content length header is optional. It uses that to support seeking within the file. Symphonia, one of the underlying backends for Rodio, has an option to tell the decoder that the source is not seekable if the size of the file is not known. Unfortunately, Rodio currently hardcodes this setting to true https://github.com/RustAudio/rodio/blob/master/src/decoder/read_seek_source.rs#L19. I actually wrote this code a few years ago so I should know this, but I can't remember why exactly. I think there was no easy way to communicate this information to Rodio since the other backends don't have a setting like this. The other Rodio backends may handle this differently. There's a lot of great info in this discussion on the Symphonia repo about this use case which helped me with my implementation: https://github.com/pdeljanov/Symphonia/discussions/153

Everything I can find on the internet seems to be abandoned. Opus-rs, Magnum, Magnum Opus, ect. Symphonia has been working on it for over 2 years, with work still ongoing. Heck, even FFMPEG seems to not have full support yet!. Is there any library that I have overlooked that provides this functionality?

In other areas, miniz_oxide is faster than miniz, Symphonia is faster than ffmpeg on most codecs, the not-yet-announced zune-png beats both libpng and the more heavily optimized libspng, and the png crate is getting considerable improvements too and also beats libpng.

Symphonia is an audio decoder framework in 100% safe Rust supporting the most popular media formats (MP4/M4A, OGG, MKV/WebM, WAV) and audio codecs (AAC-LC, ADPCM, ALAC, FLAC, MP1/2/3, Vorbis, PCM).

The Music Player is based on Rodio, which is a high-performance audio playback library for Rust, and Symphonia, which is a Rust library for working with music metadata and audio decoding. This allows the Music Player to provide high-quality audio playback and management.

You can look at symphonia for a pure Rust solution.