Pioneer SC-LX58, playing music in stereo_13_4

AV receiver : SC-LX58 (PURE DIRECT mode : Hi-bit32 ON, UpSampling x4, DFILTER SLOW) Speaker : B&W 683S2 Recording : BEHRINGER C-2 (left track on and right track mute recording and left track mute and right track on recording, then mix them to stereo ; nominal frequency response compensated ; 1.7m from speaker ), TASCAM US-2x2