Since I didn't get any response to this post under support, I guess I should have posted it here... reposting then.
I've created a customised version of the Pact Worlds Medium
Starship soundset for my PC's ship, adding a voice countdown to the
drift insertion mood (which since we're playing Stars Without Number
I've reskinned as a "Spike Drive")
It plays great in the creator and the regular player, but when I try
to play it through the Syrinscape Online player (and the Master/Minion
before that) the voice comes through EXCEEDINGLY LOUD. I MEAN
MIND-BLOWINGLY, SPEAKER RATTLINGLY LOUD. THINK OF THE LOUDEST THING YOU
CAN POSSIBLY IMAGINE, THEN IMAGINE NOT BEING ABLE TO HEAR THAT THING
OVER THE SOUND OF THAT VOICE. YES IT'S THAT LOUD.
I don't seem to have this problem with other sounds, just this one.
The only thing I can think of is that for this sound I'm using the
"Metal Room" reverb, to get the effect of the voice ringing through
ship's corridors. Maybe that reverb setting isn't playing nicely with
the Online player.
If you want to have a look at it for yourselves, the soundset is
Noble Ronin, the mood is Spike Drill and the two elements are Drift Jump
(yours) and Attention (my custom sound)