kani🦀

^{"kani" means club in Japanese}

Toy audio processor I made in my holidays for fun :D

Design

    Input          Configurable Audio Processor          Output
┌───────────┐      ┌──────┬──────┬──────┬──────┐      ┌───────────┐
│           │ L ch │      │      │      │      │ L ch │           │
│           │  ┌──►│  LPF │  EQ  │  EQ  │      ├──┐   │           │
│           │  │   │      │      │      │ Cross│  │   │           │
│  Line In  ├──┤   ├──────┼──────┼──────┤ feed │  ├──►│ Line Out  │
│           │  │   │      │      │      │      │  │   │           │
│           │  └──►│  LPF │  EQ  │ None │      ├──┘   │           │
│           │ R ch │      │      │      │      │ R ch │           │
└───────────┘      └──────┴──────┴──────┴──────┘      └───────────┘

Features

• DSP
  • Volume
  • Parametric Equalizer (Biquad Filter)
    • Low Pass / High Pass / Peak EQ / High Shelf / Low Shelf
  • Delay
  • Crossfeed (just might work)
  • Vocal Remover (just might work)
  • Convolver (super slow non-FFT implementation)
  • FFT
  • Normalizer (ajusts volume when detects signal > 1.0)
• Input / Output
  • Audio Interfaces (using PortAudio, ~200ms latency)
  • Files (currently 2ch 16bit WAVE only)
  • Pipe
  • Spotify Connect (using librespot & pipe)
  • Resampling
    • Cool interpolation instead of copy and paste
• User Interfaces
  • CLI
    • with cool RMS meter🥰
  • GUI
  • Config (Import / Export)
    • Update DSP config during playback
• Supported Platforms (should work on same platforms as PortAudio)
  • Linux
    • ARMv7
  • macOS
  • Windows
    • ASIO

Build

Prerequisites

PortAudio

# Linux
sudo apt install portaudio19-dev
# macOS
brew install portaudio
# Windows
.\vcpkg install portaudio

librespot

# Linux only
sudo apt-get install build-essential libasound2-dev
# All platforms
cargo install librespot

Run

git clone https://github.com/ebiiim/kani && cd kani
cp ~/.cargo/bin/librespot{,.exe} .
cargo run --release