This is a nice synthetic ocean sound, with "waves":
play -n synth brownnoise synth 0 0 0 10 10 40 trapezium amod 0.1 30
play -n synth brownnoise synth pinknoise mix synth 0 0 0 10 10 40 trapezium amod 0.1 30
File Size: 10 Encoding: n/a Channels: 1 @ 32-bit Samplerate: 48000Hz Replaygain: off Duration: unknown In:0.00% 00:00:00.00 [00:00:00.00] Out:0 [ | ] Clip:0
Could you please share any other examples of commands?
[1] https://ibb.co/GVG0Rdf
This is a nice synthetic ocean sound, with "waves":
Or with a little more high end, it sounds like gusts of wind: