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inline controls

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After years, Google to force Android device OEMs to support [some] standard headphone inline controls

The Android CDD is a tedious document to pick over, largely because very small changes in wording can have very big consequences. While I would hardly call this one "very big," it's still significant: Google has changed the support of standard impedance-based inline headphones controls from a suggestion to a hard requirement. Now, devices with 4-conductor 3.5mm audio jacks must recognize the impedance range and corresponding action it must produce when used on an inline controller.

MUST support the detection and mapping to the keycodes for the following 3 ranges of equivalent impedance between the microphone and ground conductors on the audio plug:

  • 70 ohm or less : KEYCODE_HEADSETHOOK
  • 210-290 Ohm : KEYCODE_VOLUME_UP
  • 360-680 Ohm : KEYCODE_VOLUME_DOWN

Inline headphone controls are a rather...

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[Lightning Review] Philips SHL9705A On-Ear Headphones With In-Line Controls And Control App

While earbuds and wireless headsets are an ever-expanding consumer electronic market thanks to the proliferation of smartphones, on-ear cans remain something of a niche (unless you count Beats - I don't). Even more niche than that are smartphone-friendly on-ear headphones. And somewhere between particularly obscure red wine varietals from Germany and Super Audio CDs lies the selection of specifically Android-friendly wired on-ear headphones. (Not really, but I wanted to make a ridiculous analogy.) The point is, if you're looking for wired on-ear headphones with Android in-line controls, your options aren't exactly endless.

The big houses such as Sennheiser either still only make in-line control products for iOS devices, or like Grado have forsaken the notion of such things altogether.

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