{
	microphone:{ # name of the virtual interface
		io:"input", # input or output
		map-on:"microphone", # name of the harware device
		resampling-type:"speexdsp", # name of the resampler
		resampling-option:"quality=10" # some option to the resampler
	},
	speaker:{
		io:"output",
		map-on:"speaker",
		resampling-type:"speexdsp",
		resampling-option:"quality=10"
	},
	feedback:{
		io:"feedback", # note : Feedback is plugged on an output not an input
		map-on:"speaker",
		resampling-type:"speexdsp",
		resampling-option:"quality=10"
	},
	microphone-cleaned:{
		io:"input",
		map-on:"speaker",
		resampling-type:"speexdsp",
		resampling-option:"quality=10",
		# specific case for AEC : only 3 options
		aec-map-on:"microphone", # the second input of the AEC (get a single)
		aec-type:"river-remover", # some type is "airtio-remover",
		aec-option:"mode=cutter"
	}
}