J-Tech Digital JTECH-18GAEV2 18Gbps HDMI Audio Embedder — 4K@60Hz 4:4:4 HDR, HDCP2.2/1.4, TOSLINK & 3.5mm Inputs

J-Tech Digital JTECH-18GAEV2 Audio Embedder: Insert external audio into an HDMI signal using either digital (TOSLINK / SPDIF) or analog (3.5mm / line) sources. A front-panel toggle lets you switch between the embedded external audio and the original HDMI audio passthrough so you can change which audio is heard on your HDMI display without reconnecting cables. Video and DRM support - UHD resolution up to 18Gbps: 4K@60Hz 4:4:4. Also compatible with 1080p and 720p signals. - HDMI 2.0 compatible and HDCP 2.2 / 1.4 compliant. - Supports 10-bit HDR and Dolby Vision, and passes CEC commands. Audio format compatibility - HDMI port will passthrough a wide range of digital and analog formats including PCM, LPCM, Dolby (Digital, Digital+, TrueHD, Atmos), and DTS. - Optical (TOSLINK / SPDIF) input supports Dolby Digital and PCM. - 3.5mm analog input accepts 2‑channel stereo audio (PCM). This unit provides a simple, hardware-based way to replace or preserve HDMI audio using external digital or analog sources while maintaining full UHD video and HDR feature support.