Hypersomnia: Crashfix when alt-tabbing, HRTF fixes for some headphones, updated OpenAL-Soft.

The app would sometimes close on its own when alt-tabbing. HRTF would sometimes show as unsupported for headphones that report themselves as 7.1 (the ones using DTS 2.0, e.g. Logitech PRO X Wireless Gaming Headset). HRT…