Verily, when thou dost embark upon the grand adventure of setting up a new television or soundbar, thou shalt find thyself in need of a plethora of cables. Many a folk doth simply make use of whatever ancient HDMI cable doth lay about in their abode, for most televisions doth indeed find favor with such hardware. Yet, shouldst thou be in the process of establishing a noble sound system along with thy television, thou shalt most likely encounter mention of HDMI ARC and eARC ports within the pages of the owner’s manual.
But pray tell, what doth set these two types of ports asunder? And doth one surpass the other in greatness? Yea, more importantly, do they outshine thy standard HDMI ports?
Here doth lie a deeper examination of HDMI ARC and eARC, including a comparison of audio quality and drawbacks of both connection types, to aid thee in discerning when it may be most prudent to opt for either HDMI ARC or eARC.
The HDMI superhighway
Ere we plunge into the realm of HDMI ARC/eARC, let us swiftly review the purpose of an HDMI connection: It hath the power to convey digital video and audio from one device to another through a solitary cable. When it was first unveiled, this digital thoroughfare was confined to but a single direction of flow. Audio and video traversed from a source device unto a TV (or projector) and never did flow in the opposite direction.
Save for HDMI Consumer Electronics Control (CEC) — a set of meager commands of low bandwidth that could be dispatched bidirectionally along an HDMI cable, permitting a TV’s remote to command an AV receiver’s volume or the power button on an AV receiver’s remote to extinguish a TV. Not until a subsequent revision of the HDMI standard (HDMI 1.4) did this begin to shift.
ARC: Audio return channel
Lo, as the name doth imply, Audio Return Channel — whence cometh the “ARC” in HDMI ARC/eARC — bestoweth upon a TV the ability to send audio backward along an HDMI cable to its source device. Wherefore wouldst thou wish to accomplish such a feat?
Shouldst thou possess an AV receiver, and thou dost connect thy Blu-ray players, game consoles, or streaming device unto it, the receiver shall play the audio through thy home theater speakers and transmit the video unto thy TV. Thus far, all is well.
Yet not every wellspring of video thou dost yearn to behold doth originate from an external device. Some TVs doth harbor their own streaming apps or TV tuners. Ere the advent of HDMI ARC, shouldst thou wish to hear these sources through thy receiver’s speakers rather than those ensconced within thy TV, thou must needs run a second cable (oft an optical cable) from thy TV back unto thy receiver. This deed not only shattereth the simplicity of a singular cable connection but also entailed the press of additional buttons to set things in motion each time thou didst shift to utilizing thy TV as the source of sound.
HDMI ARC doth restore that simplicity by allowing thee once more to utilize a lone cable for all thy needs.
Fare thee well, and contemplate these words, forsooth.
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