Video export settings and audio export settings are two separate properties.

[jacobsologub]

nyx-tutorials/api-v2/Script Examples v2/Blends-And-Transitions-v2/Blends-And-Transitions-api-2.js

Lines 73 to 83 in 46eb629

	composition.videoExportSettings = {
	video: {
	averageBitRate: bitrate * 1000 * 1000 * 8, // convert to bits per second
	profileLevel: "H264High41"
	},
	audio: {
	numberOfChannels: 2,
	sampleRate: 44100,
	bitRate: 64000
	}
	}

https://jacobsologub.s3.amazonaws.com/hypno/doc/classes/_hypno_.hypno.composition.html#videoexportsettings

Video export settings and audio export settings are two separate properties. So the code should be:

composition.videoExportSettings = {
    averageBitRate: bitrate * 1000 * 1000 * 8, // convert to bits per second
    profileLevel: hypno.H264High41
};

composition.audioExportSettings = {
    numberOfChannels: 2,
    sampleRate: 44100,
    bitRate: 64000
};