Replace existing audio in an HMDI signal with stereo analog or multichannel digital audio using the Sescom SES-AUD-N-HDMI4K audio inserter. This Sescom audio inserter provides full 4Kx2K and 3D support for full resolution video. For playback of 4Kx2K/3D HDMI source signals, a 4Kx2K/3D capable display and high speed HDMI cables are required. NOTE: You may pass existing audio from the HDMI source or replace the audio using the analog or optical input. However, this device will not simultaneously "mix" or combine more than one audio source.