Quote:
Originally Posted by gguerra
Clearly a case of "we'll cross that bridge when we get there". I have experienced BT delay on my newer Firestick 4k. The fix was setting audio to stereo instead of surround. The headphones are obviously stereo. This is not an issue on my older HD Firestick, go figure. Delay is an issue that can be fixed with software/firmware.
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Firestick 4K is BT 5.0 which has A/V sync which mostly solves the issue by just playing the audio before the video. That way by the time it finally gets there they're more or less in sync. It generally works well, just match with BT 5.0 headphones and let it do its thing.
Delay is something that can be compensated for in software (BT 5.0) or minimized at the expense of quality (AptX LL or AAC vs LDAC, AptX HD, or SBC). It cannot be fixed though. LDAC (Sony), AptX (Qualcomm), and LHDC/LAC (China brands + Sennheiser) are all proprietary. Just depends on licensing. If your receiver and transceiver both support LDAC you can use it. If they don't you can't. Apple uses AAC which would be closest to AptX LL, so less latency at the expense of audio quality. Just make sure you get headphones which support AAC although that's pretty much everything.
AptX is the most common and then there's a bunch of codecs: LL, regular, HD, Adaptive, Live, Voice. Not all of them will be supported by all devices. Example would be my headphones are AptX HD and Adaptive. My phone, however, does not support AptX Adaptive. I can only use AptX HD.
Watching videos? No problemo. Phone and headphones are both 5.0, A/V sync does it's thing. It's not perfect but it's close enough that unless I'm really paying attention to that it's ever so slightly out of sync it doesn't bother me at all. The latency though, oh boy it's straight up atrocious. Android is all over the place with latency from device to device and mine is definitely all kinds of bad. We're talking close to a full second of latency. Without A/V sync it'd be next to unusable for video unless you just wanted to have it on for background noise or something.
On the other hand, my laptop has much lower latency. I couldn't really tell you what codec it's running as there's no easy way to tell in Windows. Maybe around ~200 ms, way, way, way better than the phone. It's annoying though. For a 10 minute YouTube video it's fine and I can put up with it. For a full movie though I definitely go find a USB cable. Difference? Laptop is BT 4.1, no A/V sync. Phone with 4-5x the latency and A/V sync better for watching movies aside from the screen being tiny of course.
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