Stream Multichanell Audio (5.1) using Dolby Digital or Dolby Digital Plus

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Hello.
Is it possible to set Sunshine to use the Dolby Digital (AC3) codec to stream the Multichanell Audio (5.1)?
My setup can handle Dolby Digital, Dolby Digital Plus or DTS but not Multichanell PCM since my Moonlight Client is connected to my TV via HDMI ARC and not eARC (so ARC doesn't have enough bandwith to support Multichanell PCM/MPCM or LPCM).
My setup:

Sunshine on Windows 11 PC -> Moonlight on NVIDIA Shield -> TV -> ARC -> Onkyo AV (5.1) -> Speaker.

Thanks.