Focus on challenging optical components


How to Convert an Optical (Toslink) Cable or Digital

by:ChangHui     2020-04-29
Unfortunately most modern HD TV's do not feature Analog RCA (Stereo) output to enable connection to older Stereo Systems. Instead most TV's these days will only offer a S/PDIF (Sony/Phillips Digital Interconnect Format) digital audio connection suitable for an Optical (Toslink) Cable or Digital Coaxial Cable. However, as great as that new TV is in delivering a crisp High Definition image unfortunately the speakers included in most modern High Definition TV's are generally not the best quality. This brings us to the common question of how do I connect this TV to my older stereo equipment? Fortunately, the answer is actually quite simple. You will need a small and very easy to use device which is known as a Digital to Analog Audio Converter (DAC). Just to clarify, this is not referring to the high grade DAC's that may form part of an audiophile grade Hi-Fi system. The device recommended here is in fact relatively inexpensive and compact. This type of device is manufactured specifically for the purpose of converting a digital audio signal to analogue (analog) to achieve the conversion outlined above. Once you have one of these devices available, you will need to connect an Optical (Toslink) Cable or Digital Coaxial Cable from output on your TV to the digital input on the Digital to Analog Audio Converter. After this step is completed, you will need to connect a set of Stereo RCA Cables (Red and White) from the output on the Digital to Analog Audio Converter to the input of your stereo system. Quite often this input connection will be labelled as 'Auxiliary' on the bookshelf type systems. Next, locate your TV User Manual so you can identify where the audio output settings are accessed from. Then follow the appropriate steps to reach this menu on your TV. Once the audio output settings have been located, you will need to change the digital output to PCM (Pulse Code Modulation). This is an uncompressed digital audio signal and is usually required by the Digital to Analog Audio Converter to perform the conversion from digital audio to analogue. There are also some models available that can decode audio formats like Dolby Digital (AC3) and DTS. However, the majority of these units will only accept PCM. Once the above steps have been completed, you will be able to enjoy higher quality audio from your TV utilising the speakers from your stereo system.
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