Which audio settings should I choose when encoding from a Premiere Pro sequence

[BobGale57]

I am encoding a Premiere Pro sequence in Media Encoder - both are the latest versions. The video is for broadcast TV which is asking for H.264. I'm using Match Source - Adaptive High bitrate. 

The spec sheet from the TV station also asks for uncompressed audio, 48kHz. Uncompressed doesn't seem to be a choice. Audio format settings are AAC and MPEG. Which one should I choose? 

If the answer is MPEG, which setting: MPEG, Layer 1 or MPEG-1, Layer 2?  I see that within MPEG the bitrate goes to 448 kbps, whereas in AAC it only goes to 320 kbps. Should I go with 448? There are many more audio settings choices within MPEG as well, which I'm unsure about. 

I'm not seeing any answers within Adobe or the internet at large. 

Thanks. 

[Warren Heaton]

Switch to the H264 Blu-Ray preset and you'll get PCM audio, 48KHz, 16-bit, stereo for audio (Linear PCM is uncompresssed).

I'd encode one minute and send that as test file.

-Warren

[BobGale57]

Thanks much Warren, I will give that a try.