[DEV] start work on dynamic chain

data/hardware.json

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+{
+	microphone:{ # name of the device
+		io:"input", # input or output
+		map-on:{ # select hardware interface and name
+			interface:"alsa", # interface : "alsa", "pulse", "core", ...
+			name:"default", # name of the interface
+		},
+		frequency:48000, # frequency to open device
+		channel-map:[ # mapping of the harware device (to change map if needed)
+			"front-left", "front-right",
+			"read-left", "rear-right",
+		],
+		type:"int16", # format to open device (int8, int16, int16-on-ont32, int24, int32, float)
+		nb-chunk:1024 # number of chunk to open device (create the latency anf the frequency to call user)
+	},
+	speaker:{
+		io:"output",
+		map-on:{
+			interface:"alsa",
+			name:"default",
+		},
+		frequency:48000,
+		channel-map:[
+			"front-left", "front-right",
+		],
+		type:"int16",
+		nb-chunk:1024,
+		volume-name:"MASTER"
+	}
+}

data/virtual.json

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+{
+	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:"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",
+		aec-map-on:"microphone", the second input of the AEC (get a single 
+		aec-type:"airtio-remover", # some type is "airtio-remover",
+		aec-option:"mode=cutter"
+	}
+}