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Apple has released specs for Lightning cable based headphones, which tout 'Lossless 48 kHz digital output'. How does this compare to the standard headphone jack? - Quora
What is the difference between the 'audio out' jack and the [optical] ' digital audio out' port on my TV? - Quora
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![Gigacord Digital to Analog Converter with 3.5mm Headphone Jack Output, Toslink Coaxial RCA Input, With Power Adapter - NWCA Inc. Gigacord Digital to Analog Converter with 3.5mm Headphone Jack Output, Toslink Coaxial RCA Input, With Power Adapter - NWCA Inc.](https://cdn.shoplightspeed.com/shops/623240/files/11997640/gigacord-gigacord-digital-to-analog-converter-with.jpg)
Gigacord Digital to Analog Converter with 3.5mm Headphone Jack Output, Toslink Coaxial RCA Input, With Power Adapter - NWCA Inc.
![Easing the transition from analog headphone jacks to digital audio interfaces - Embedded Computing Design Easing the transition from analog headphone jacks to digital audio interfaces - Embedded Computing Design](https://data.embeddedcomputing.com/uploads/articles/wp/590/58ffd5b054c5e-Images_USB+audio+article+Fig1.jpg)