Pretty cool, just the fact it works instantly in the browser with nothing to download is actually kinda wild to me tbh.
Show HN: Beatsync – perfect audio sync across multiple devices
81–90 of 135 posts
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#82This is really cool, thanks for sharing. I've got a couple of pseudo-radio stations on https://ambiph.one/ which are very roughly synchronised for all users but it's based on their device clock so it can get a couple of seconds out of sync very easily. Looking forward to picking through your code to see if there are any techniques I can borrow!
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#83TIL what NTP is. Interesting to read about how the underlying algorithm works, and that they had pretty good accuracy 40 years ago.
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#84This is very, very cool; it's a thing I've been looking for on my backburner for several years. It's a very interesting problem. There are a ton of directions I can think about you taking it in. The household application: this one is already pretty directly applicable. Have a bunch of wireless speakers and you should be able to make it sound really good from anywhere, yes? You would probably want support for static c…
Silent disco in which everyone brings their own source and headphones.
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Re: Show HN: Beatsync – perfect audio sync across multiple devices
#85Really cool but issues for me when uploading mixes (MP3's about 90 mins long, 150MB). They never make it to the playlists
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#86Great solution based on websocket!.
My Vision: A web based VLC-type webplayer (capable of VLC level features) with support to distribute Audio channels over connect devices.
Here me out: - Mac as display(Movies screen) - iPad as a Center channel - 4 iPhones as LR and rear channels, (and something for LFE).
Is it Practical? sound cool in my head. What do you guys think??
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#87TIL what NTP is. Interesting to read about how the underlying algorithm works, and that they had pretty good accuracy 40 years ago.
Wait until you hear about PTP :)
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#88Really cool but issues for me when uploading mixes (MP3's about 90 mins long, 150MB). They never make it to the playlists
if it's behind nginx, check client_max_body_size. Set it to something big
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#89Earlier quoted context omitted.
For devices with mics, can you have them play a test chirp to measure the latency of Bluetooth or other laggy sound stack?
Bluetooth audio devices that I use tend to change the protocol as soon as it switches to headset mode (with microphone enabled), which works terribly for music. I imagine the protocol used when the microphone is enabled might have completely different latency characteristics than the one used purely for audio, so a chirp might be measuring completely different thing
You could use a different device in the swarm for measurement, but yeah it seems pretty quickly complicated! I have no idea as well how stable the latency is
Re: Show HN: Beatsync – perfect audio sync across multiple devices
#90Earlier quoted context omitted.
Absolutely! Silent disco still requires impractically expensive rental hardware to work well as far as I know. A lot of them run off FM radio, since it's the simplest way to go, but nobody owns portable radios anymore. An OSS app with the ability to sync everyone up over mobile or wifi, on Android or iOS with BYO headphones, would be incredible. This should be a thing :)
I wonder if something like this (without the OSS part) doesn't already exist. Some cinemas in France have some kind of app for people who are either hearing or visually impaired which allows them to follow the movie. I've never seen in action and don't know how it works, but at least for the audio part it should be able to synchronize the phone with the cinema screen. If I'm not mistaken, it's provided by this compan…
Roku sticks allow this for t.v watching, via the Roku app. No idea how well it works for audio or more latency sensitive applications.