Semi-physically-based Raindrops Generator

This is a Raindrop sound generator based on the paper from DAFx conference.

• Computational Real-time Sound Synthesis of Rain

  • http://huelights.com/docs/P_169.pdf

• The rain drops was modelled as 2 different stages, rain drops on hard surface and wet-surface. And a single drop last around 10-20 ms. The exact model was given in the paper above.

  

  Since no analytical solution resolution were given for the wet-surface model, I approximated the waveform with exp(-t)sin(t) function.

• This project supports VST and AU format for audio plugin in your DAW.

• You can play around with these parameters

  • Gain - Overall audio gain
  • Density - How many drops per second
  • Freq Coeff - Controls overall frequency
  • Interval Coeff - Controls average duration of drops
  • Noise Level - White noise level
  • High pass filter and Low pass filter
    • 12dB / Oct

• To make a procedural rain sound, you may use multiple tracks of Drops generator (High freq and Mid freq) and mix them with some level of white noise.

  • A good practice will be using these 4 different layers.
    • Light high-frequency boiling
    • Mid-frequency boiling
    • Stereo noise
    • Individual raindrops
  • This idea comes from this blog post, and I recommend you to check it out.
    • https://blog.audiokinetic.com/zh/generating-rain-with-pure-synthesis/

Build Instruction

Clone

This project uses JUCE as its submodule, please use git clone --recurse-submodules [url-to-project] to clone this project.

Build

This project use CMake for Compiling. CMakeLists.txt has been provided.

mkdir build
cd build
cmake ..
make