5 ms·

We don't have a way to turn these on from the UI, but here is how you can disable all audio processing: https://meet.jit.si/YourRoonNameHere#config.disableAP=t

by saghul 7y ago

We don't have a way to turn these on from the UI, but here is how you can disable all audio processing: https://meet.jit.si/YourRoonNameHere#config.disableAP=true https://meet.jit.si/YourRoonNameHere#config.disableAP=true

telesilla 7y ago
Firstly, thanks for your work on what is really a great project. Can we set stereo=1 in the SDP and also the bandwidth constraint? That would make it ideal for this use case. For music quality webRTC you need 3 things: disable audio processing, stereo=1 in the SDP and a way to limit bandwidth usage so it doesn't saturate the available bandwidth and create errors. Disabling video is also really the best thing to do when recording for this reason (bandwidth saturation), and also Chromium will give you much superior experience. Safari and Firefox isn't quite there yet: Safari can't let you choose your output device and lacks some other useful features, and Firefox doesn't yet seem to allow stereo Opus, maybe that's changed since I tested. Microsoft Edge is now Chromium so you're good to go.
- padenot 7y ago
  Firefox has supported stereo opus for a very long time (four years at least?). We know it works, it's used by medical professionals for their job and they wrote a message a few month thanking us for this feature, that doesn't seem to work on other browser (according to them, but I see tickets open on chromium). Of course all the chain has to be stereo, that goes without saying: input signal is stereo, negotiation has been done in stereo, having enough bandwidth is important (otherwise opus goes mono), and then playback has to be on stereo hardware (but that's the easy part).
tasty_freeze 7y ago
Thanks for the quick reply. I'll be trying it out tonight.
deleted 7y ago
[deleted]
vitro 7y ago
We hold regular flute meetings and play together. In this quarantine time we wanted to meet online, but if we play all at once, it seems I cannot hear everyone else at the same time. I guess it is as if everyone was shouting over everyone else, which is not the case when you have a meeting where usually only one person speaks at a time Will this also fix this issue? So everyone will be able to hear everyone?
- gnud 7y ago
  You won't be able to play together because of latency. You will think you are in time with someone, but you will react when you hear/see them on your screen, which is maybe .15 seconds after they actually made the sound/movement. And then they will hear/see your reaction .15 seconds later again.
  - lmm 7y ago
    Musicians already deal with that kind of issue when doing particular kinds of performance (e.g. famously at Wagner's festival opera house, where the orchestra is in a deep pit below the singers).
    - gnud 7y ago
      Yes - then you all follow a conductor. And you _don't_ listen for cues, so there's no reason to worry about not hearing everyone at the same time...
  - tpolzer 7y ago
    If all participants have good internet and are geographically close it should theoretically be possible to have delay not much greater than rtt/2 for everybody. With rtt < 20ms that should make musical performances possible. After all, sound only travels less than four meters in 10ms. So this is just like singing in a choir (with more visual delay - but that can be solved by having a conductor). Unfortunately I'm not aware of any software making that a practical reality, even with ftth.
    - 7y ago
BrowserMeeting 6y ago
Had no idea that you could do this. This would be awesome for music lessons

by saghul 7y ago

telesilla 7y ago

Firstly, thanks for your work on what is really a great project. Can we set stereo=1 in the SDP and also the bandwidth constraint? That would make it ideal for this use case. For music quality webRTC you need 3 things: disable audio processing, stereo=1 in the SDP and a way to limit bandwidth usage so it doesn't saturate the available bandwidth and create errors. Disabling video is also really the best thing to do when recording for this reason (bandwidth saturation), and also Chromium will give you much superior experience. Safari and Firefox isn't quite there yet: Safari can't let you choose your output device and lacks some other useful features, and Firefox doesn't yet seem to allow stereo Opus, maybe that's changed since I tested. Microsoft Edge is now Chromium so you're good to go.

padenot 7y ago
Firefox has supported stereo opus for a very long time (four years at least?). We know it works, it's used by medical professionals for their job and they wrote a message a few month thanking us for this feature, that doesn't seem to work on other browser (according to them, but I see tickets open on chromium). Of course all the chain has to be stereo, that goes without saying: input signal is stereo, negotiation has been done in stereo, having enough bandwidth is important (otherwise opus goes mono), and then playback has to be on stereo hardware (but that's the easy part).

tasty_freeze 7y ago

Thanks for the quick reply. I'll be trying it out tonight.

deleted 7y ago

[deleted]

vitro 7y ago

We hold regular flute meetings and play together. In this quarantine time we wanted to meet online, but if we play all at once, it seems I cannot hear everyone else at the same time. I guess it is as if everyone was shouting over everyone else, which is not the case when you have a meeting where usually only one person speaks at a time Will this also fix this issue? So everyone will be able to hear everyone?

gnud 7y ago
You won't be able to play together because of latency. You will think you are in time with someone, but you will react when you hear/see them on your screen, which is maybe .15 seconds after they actually made the sound/movement. And then they will hear/see your reaction .15 seconds later again.
- lmm 7y ago
  Musicians already deal with that kind of issue when doing particular kinds of performance (e.g. famously at Wagner's festival opera house, where the orchestra is in a deep pit below the singers).
  - gnud 7y ago
    Yes - then you all follow a conductor. And you _don't_ listen for cues, so there's no reason to worry about not hearing everyone at the same time...
- tpolzer 7y ago
  If all participants have good internet and are geographically close it should theoretically be possible to have delay not much greater than rtt/2 for everybody. With rtt < 20ms that should make musical performances possible. After all, sound only travels less than four meters in 10ms. So this is just like singing in a choir (with more visual delay - but that can be solved by having a conductor). Unfortunately I'm not aware of any software making that a practical reality, even with ftth.
  - 7y ago

BrowserMeeting 6y ago

Had no idea that you could do this. This would be awesome for music lessons