A new SIEGE build type is around – namely, non-monolithic SIEGE.
Don’t worry, the “monolithic” build is not going anywhere, it’s still staying around; on the other hand, the non-monolithic build will enable you to only link to (and bundle/use) one component of SIEGE, plus its dependencies, instead of the whole thing.
So, if you only need SIEGE’s audio, you’ll only need to link to SIEGE Audio and module loading (and possibly util).