High-Efficiency AAC supports a broad range of compression ratios and configurations ranging from highly efficient mono and stereo coding (typical operation point 32 kb/s stereo with HE-AAC v2) via high quality multi-channel coding (typical operation point 160 kb/s for 5.1 configuration) to near-transparent multi-channel compression (typical operation point 320 kb/s using AAC-only operation). Because subsequent HE-AAC versions form a superset of their predecessors, HE-AAC v2 decoding is fully compatible with AAC-only and HE-AAC v1 content.