fm-dx-webserver/stream/settings.json

{
    "RtcConfig" : null,
	"FallbackFFmpegPath": "ffmpeg.exe",
    "FallbackUseMp3": true,
    "FallbackUseWav": false,
    "FallbackMp3Bitrate": 192,
    "FallbackWavSampleRate": 16000,
    "AdminKey": ""
}