Not sure why people are downvoting, you are right. From TFA: > Wireless in-ear headphones [...] are still relatively large and many of their components drain t

Not sure why people are downvoting, you are right. From TFA: > Wireless in-ear headphones [...] are still relatively large and many of their components drain the battery quickly, restricting internet connectivity, payment functions and other smart features. One can venture to guess this is a poor translation where original authors were hinting at all-digital signal path system, something that together with encryption is already available as DRM for video (HDCP), but not for audio yet.