Why bother with the Complete Journey on Steam either? It has broken audio just as the recent GOG versions here.
On the other hand, you can actually download the unbutchered versions on Steam.
Here is a guide how to download old versions:
https://www.reddit.com/r/Steam/comments/611h5e/guide_how_to_download_older_versions_of_a_game_on/
It would be really great, if GOG could offer that service too. Preferably less obfuscated to use that is.
Anyway, to have the audio intact, take the latest version before November 17, 2014 for each of the three games.
Unfortunately there is no Linux version before that date.
As a side effect, the first two games are much larger in that version, as they also have lossless backgrounds.
But remember: Don't buy the Complete Journey (except for the bonus material that is). That edition was broken from the beginning on. It introduced this audio mess and they backported it to the standalone games.
It is also expected behavior that the engine of the first game doesn't perform that smooth in the old version, but that doesn't bother me nearly as much as broken audio.