Something must be amiss here, just got my SU12 update on xbox.
Inside the cockpit there is now this constant looping whine once you turn on the batteries, it's painful as you can't stop hearing this annoying split second pause and it's at a frequency that is always above all other sounds like the apu bleed, packs, hell even the now quiet engines. The noisiest part of the plane has now become the battery whine in the cockpit, no longer the engines, they seem to have lost all their grunt! During flight inside the cockpit the engines even at full power sound like I have an air compressor running in the background, they certainly no longer sound like jet engines.
Another weird one is when the APU kicks in the increased noise that typically happens when I turn on the APU bleed next (packs come on) is already at that volume, turning on the bleed you can hear some almost muted background sounds kicking in but that "packs are running" sound is there from the start, apu bleed being on or not. Likewise when now turning on the engine starter the packs don't 'audibly' power down either, basically barely any ambient volume difference between the engine starters being on or not. How this compares to the real plane I have no idea but it just sounds VERY different to that it was before and as I recall from flying other airliners when on PC was that the engine starting procedure very audibly powered down the packs.
Something strikes me as not being right here and sound is such an important feature and as much as I love your work guys, based on the current sounds the immersion of flying this plane has gone down to the level where I will have to leave it in the hangar. So I do hope this can be attended to because being stuck on xbox this is the only airliner worth flying currently.