GSoC 2024: Sample Sound Node

Contributing to Blender Summer of Code
5

Week 4

In this week, I:

  • Supported custom smoothness (sample length) in the node,
  • Supported adding window functions when doing FFT, and
  • Rewrote LRU cache using Blender’s BLI libraries.

The project file is attached in a comment from my working PR. The packed audio is made by myself and licensed under CC0.

Known issues:

  • Overall amplitude (of FFT results) varies significantly with smoothness. This issues might be related to some properties of FFT itself and needs to be further researched.
  • fftwf_execute() fails to plan when multiple layers containing this node are present.

I will be inactive in the next week, since I have to prepare for the final exam (ends on July 5) at school. However, the next steps could be:

  • Carefully design the previously mentioned Sound Info node to get more than just sample rate and channel amount from a Sound,
  • Try to eliminate some of the crash scenarios, and
  • Prepare for the mid-term evaluation of GSoC.
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