Higher audio bitrate option for Enhanced Broadcasting (up to 320 kbps)

Enhanced Broadcasting currently caps audio bitrate at 190 kbps, even when OBS is configured to send 320 kbps. Confirmed via Twitch Inspector: disabling Enhanced Broadcasting restores the full 320 kbps audio; enabling it drops audio to 190 kbps regardless of OBS settings.

This is a real issue for musicians and live performance streamers. I'm a one-man-band streamer (live guitar, vocals, and foot-operated drums simultaneously), and the extra compression at 190 kbps introduces audible artifacts on multi-source audio that aren't present at 320 kbps.

Enhanced Broadcasting was built to push past Twitch's usual technical limits (multi-resolution encoding, higher video bitrate, better codecs). It would make sense for audio to get the same treatment: allow up to 320 kbps audio bitrate when Enhanced Broadcasting is enabled, just like it's already possible without it.

Twitch Support (case #10420917) confirmed this is a known current limitation, not a config issue on my end, and pointed me here to request it as a feature.