About this item RCA ANALOG TO OPTICAL DIGITAL ONLY Note】BEFORE USING THE PRODUCT, ADJUST THE AUDIO OUTPUT FORMAT OF THE TV TO PCM (Device Home→System Settings→Picture and Sound→Sound Settings→Digital Audio Output→PCM), and Volume can only be adjusted on the output device, not via the TV remote control. In addition, the product does not support connection to headphones This converter is designed for professional audio signal processing. 192 kHz optical to RCA male cable can directly connect to stereo amplifier and convert optical toslink digital audio signals to RCA analog audio signal This audio converter adopts a built-in professional audio amplifier chip and a dual-channel operational amplifier, which can amplify the RCA output level and make the sound pure and clear Analog to digital audio converter provides professional 24Bit/192KHz sampling rate, avoiding distortion of the original signal. Optical input supports signal processing up to 32, 44.1, 48, 96, 192 sample rates, and 24-bit bit streams SPDIF to RCA converter works great with HDTVs, set-top boxes, DVD/Blu-Ray players and game consoles. (NOTE: It is incompatible with 5.1 channel signal such as Dolby AC3, please adjust the audio output to PCM before use.)