EEVblog Electronics Community Forum
General => General Technical Chat => Topic started by: linux-works on June 27, 2015, 08:52:42 pm
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anyone here familiar or experienced in this stuff?
I'm talking about the TRRS small size headphone jack that has a 4th band for remote control. I've read here:
http://www.wisebread.com/build-a-cable-to-control-your-android-phone-while-you-drive (http://www.wisebread.com/build-a-cable-to-control-your-android-phone-while-you-drive)
and other places that its resistance based for some functions and 0 ohms to gnd for play/pause. I have an android earbud cable that has this function and also a base noise cancelling cable that does this, as well.
here's where I'm a little confused; I tried using this cable on a player I recently bought (Fiio x3-II) and that claims to have ctia remote ability. ok, fine, go to its config menu (on the audio player), enable the remote control option and lets see what happens. I plug the cable with the 4 bands into the phones-out jack and press buttons. the pause/play button does actually toggle those modes, so that's great. but skip back and forward don't do anything.
then, just while trying random stuff, I multiclicked on the pause button. that changed songs! lets try some variations, 2 clicks and 3 clicks. yup, that skips one way and the other way. that's the 4 functions, but they are overloaded on the play/pause 0ohm-to-gnd band (or button) and the restance-based style does not seem to be supported by this player.
has anyone seen this before or know if this is just a vendor-strangeness thing? I just happened to figure this out by trying multiclicking and I'm not even sure what made me do that ;) I can now create some small controller that will receive my command and translate to multi-tap stuff, but it just seems strange that they'd do it this way on the player and become incompatible with, what seems to be a standard that uses R values and not pulses on a single band.
I have not tried to contact the vendor yet, but curious if anyone has seen this or tried to work with this inline remote stuff before.