ir.lv2 1.3.4~dfsg0-1 (arm64 binary) in ubuntu focal

 IR is a zero-latency, realtime, high performance signal convolver
 especially for creating reverb effects. Supports impulse responses
 with 1, 2 or 4 channels, in any soundfile format supported by libsndfile.
 .
 IR files can be for example here:
  - https://musical-artifacts.com/artifacts?tags=impulse+response
  - https://musical-artifacts.com/artifacts?tags=ir
 .
 For converting 2ch impupuses to 4ch *True stereo* format
 use 'convert4chan' utility. See man pages.