LFE 36 sound/hda/hdmi_chmap.c LFE = (1 << 10), /* Low Frequency Effect */ LFE 50 sound/soc/codecs/hdmi-codec.c LFE = BIT(10), /* Low Frequency Effect */ LFE 64 sound/x86/intel_hdmi_audio.h LFE = (1 << 10), /* Low Frequency Effect */