Jamulus
Replies: 5 comments 15 replies
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The most basic setup (independent of Jamulus) would be one singer, one microphone, one monitor (speaker). The speaker is directed towards the singer to hear himself, but no feedback occurs as the microphone is 'directed' towards the singer (see "Directivity" = "Richtcharakteristik") and so picks up just little sound from the speaker. Feeding an additional signal (coming from Jamulus) into the Speaker should not make a difference. |
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I'll want to follow your use case closely. I am working on a similar use case. |
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You could setup
You could also try having return loudspeakers at your feets, but as said above, the probability of a sound loop would then be very high and very difficult to manage/avoid. I think option one (one mike, several headsets) would be more cost effective and much easier to manage. |
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Thank you very much for your comment. I think we own a Tascam recorder and headsets might be available too. (But hygiene questions might arise since they might need to be shared) The headset amp doesn’t seem to be too expensive. I haven’t looked at the PA system yet, but maybe we already have one. |
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A bunch of wireless RF headphones using FM? They don't cause relevant additional delays (must not be digital), can all work off the same sender (assuming they are of the same type or at least use the same frequency/modulation) and don't create extensive cabling traps. And people can take them home and use them there as well. The ones intended for TV use may employ excessive AGC. They tend to be workable, but if there is some transient from somewhere (someone stumbling over the microphone stand), it takes some time before volume picks up again. |
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The main problem with wireless these days is that you have to get the old ones with analog technology and FM (and consequently a limited SNR ratio). Go digital (like Bluetooth), and your system delay goes up. If you want to support a large number of people, sourcing a large number of them may become tricky. |
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Just talked to one of our responsible persons and they‘d rather just use Zoom to stream one way audio & video for now 😒 (while letting the Jamulus people rehearse online at another time). I‘m still in favour of adding some part of Jamulus in these rehearsals. |
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I'm with you. We're going back to live rehearsals next week, and, well, I am not sure how to sell a few things that have proven useful. Like being able to put in a drum track (either default arranger stuff or stuff I typed into a notation program) at arbitrary speed and entirely unimpressed by other players. Or the ability to turn up the volume of the bass accordion for purposes of keeping tight timing. Either of which can be amended by equipment I could store next to our rehearsal room (I think the bass accordion has a built-in microphone that would be comparatively proof against feedback). I have a nice 100W keyboard amp from the seventies in washing machine size and it doesn't use bass reflex tubes or similar nonsense to move air. It does a pretty solid bass drum impression and can still put up an undistorted drum kit (and likely a bass accordion) on top without sounding anything like a "car HiFi". Still likely a harder sell than if I can just inject the arranger into my mixer strip without needing an amp. Geek time may be setting. |
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Yeah, there’s a lot of stuff possible with tech nowadays ;-). Although we‘ll probably not get rid of Jamulus (we still have huge plans with the software) it will become less important. I was actually thinking of getting a bunch of choirs/musicians together in some kind of summer concert; but I didn’t have time to do planning or anything else. |
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The rules might vary in different (wireless world) regions. In North America, the spectrum for the old analog technology was being "retired" for new (digital) applications. This means that if you are using the old analog technology, you should expect the channel to become noisier as the new generation equipment comes to market. (This is part of the reassignment of spectrum white space.) |
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Slightly late to this discussion - ann0see how did you get on in the end? One thing that occurred to me was to use smartphones with Jamulus android client as your "wireless headphone" device. With a wired headest/earpiece this gives reasonably low latency in my experience. Using a smartphone microphone may also be feasible - my testing was unsatisfactory as they appear to be tuned for voice - but for singing this may be fine. So in effect every singer could have their own personal mic/headset. |
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Unfortunately we used Zoom ;-(. How did you connect the smartphones WiFi doesn’t work well on them. |
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In my testing I used an ethernet USB-C on-the-go (OTG) adapter. These are very cheap. This allowed me to connect the smartphone to an ethernet switch - although this could have been the Internet router. I got performance comparable to running jamulus on a wired PC on the same network. You're right - wi-fi not only introduced considerable lag, but it was also very variable and unpredictable (from bad to awful). I then plugged the over-ear headphones into the smartphone.
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About a year ago, after days or weeks of internet research aka ("HOW DO I GET RID OF THIS STUPID LATENCY ON ZOOM??"), I finally found out about Jamulus.
I'm probably not the only one who says this, but this app has been a lifesaver for my choir until now. For sure, not everything went well right away, but eventually we started being able to do real rehearsals over the net. Since February 2021 we're using Jamulus for our weekly rehearsals, did 2 streaming concerts and recorded hours of songs. Our choir organization now runs a semi-public directory server to enable this experience for multiple other choirs in our region.
Luckily, the numbers of COVID infections are decreasing and multiple choirs are now thinking of returning back to in-person rehearsals. Therefore - at least to me who still wants to use Jamulus - another big topic will come up:
How can we combine in-person rehearsals with online Jamulus rehearsals?
I'm sure a lot of people are interested in this topic - so am I ;-). I'd be happy to have this discussion focus on experiences and knowledge exchange.
Therefore I'll first share my experience here:
A few days ago we connected our church-PA system to a PC which was connected to the internet by 4G/5G. All musicians except one were at home. Surprisingly, the person in church could play almost in time with the online group (overall delay was < 80ms). Now the question is: what's an easy and inexpensive way to capture sound from ~ 10 singers in church (who are at a large distance) without provoking feedback? I'm quite sure that we could provide everyone with a microphone and headphones; however that's not really what we want. In a perfect setting, having loudspeakers and one/two microphones placed in such a way that the live people hear the online people while also the other way round works would be great. I'm sure that this is possible since on stage this must also work somehow. Does anybody have experiences in this field?
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