Minecraft 1.20.1
Ambient Sounds 6.0.6

I noticed this when I was high in the sky with a hot air balloon (breezy).

Ambient sounds only seem to play when the player is within 15 blocks of a block.

Honestly wish there were wind sounds at high altitudes instead of dead silence.

Would be overjoyed if this great mod were to become even greater by addressing this issue!

At least a wind sound should play, right? Can you send a few screenshots of situations where you feel like sounds should be audible? Please also enabled /ambient-debug for that.

There are absolutely no sounds at all when I'm not within 15 blocks of a block.
They slowly fade out when I'm out of range.

Edit: Noticed this just now, but cicada and cricket sounds play when I'm really high?

There should be a sky sound, which was not working. It is fixed in the newest version. Also fixed a few other things. Thanks for reporting this issue.