In hdaudioctl.8, the show command should have 2 arguments: codecid, nid $ sudo hdaudioctl show usage: hdaudioctl [-f dev] list hdaudioctl [-f dev] show <codecid> <nid> hdaudioctl [-f dev] get <codecid> <nid> hdaudioctl [-f dev] set <codecid> <nid> [plist] hdaudioctl [-f dev] graph <codecid> <nid> $ -RVP