The lag happens because FF throttles the frame rate that's calling Jerrica when a tab isn't the center of attention. When used in a game, the developer could choose the lazy route I did in the demo or could stop calling Jerrica completely.
In terms of the clicks and pops, if it's not an imposition, could you let me know if you hear similar artefacts in the Newgrounds game listed in the FAQ? That MOD file was specifically modified to try and minimise that issue and I'd be interested in if it sounds better or worse on your setup.
In terms of the clicks and pops, if it's not an imposition, could you let me know if you hear similar artefacts in the Newgrounds game listed in the FAQ? That MOD file was specifically modified to try and minimise that issue and I'd be interested in if it sounds better or worse on your setup.