libnx: Audio output broken on firmware 1.0.0 [audout]

Audio output does not work on 1.0.0. I tested with all of the audio examples from switch-examples, playing an MP3 with NX-Shell, and playing a game with mGBA and all of them were completely silent; I tested with NROs compiled with the latest libnx. Here is the output from the audio switch-examples:

• audren-simple.nro: https://i.imgur.com/nu6Zw6K.jpg
• echo.nro: https://i.imgur.com/dLAVCPM.jpg
• playtone.nro: https://i.imgur.com/We7lqzw.jpg

I believe the return result in audren-simple.nro may be the problem, as 0x499 is the Invalid buffer address failure case. It seems a similar issue may have been fixed in the past but audio output remains broken.