[PD] live audio broadcast (radio) to lan with low latency

Christof Ressi info at christofressi.com
Mon May 11 09:50:20 CEST 2020

> would it be possible to receive AoO Audio over OSC?
AoO can work with relatively low latency, but usually you'd need to 
write an app. Since it is essentially a C/C++ library, it should be 
possible to compile it to WASM with Emscripten and then run it in the 
brower. I haven't tried it yet but it's on my TODO list :-) We currently 
use AoO for our virtual rehearsal space here at the IEM and I'll make a 
new release in the next few days.


On 11.05.2020 02:25, Marco Schretter wrote:
> dear list,
> i'm thinking about the following (corona)performance-situation without 
> any good solution by now:
> live performance situation where (an arbitrary no. of) people on the 
> street can pass by and listen somehow to the performance live audio in 
> 'realtime' with their mobile devices. the performers are eg. behind a 
> window or on a distant stage, so some of the live-sound will be 
> audible to the listeners too.
> that's why the system solution should have a low latency. the 
> situation can also be considerated similar to a drive-in cinema.
> i tried streaming with pd [mp3cast~] / [oggcast~] to an icecast server 
> and listen to the signal on the lan with a browser but the latency is 
> hell (device dependent, browser dependent, no control of buffers on 
> receiver etc)...4000ms :-( . also other streaming solutions had quite 
> a big latency.
> another thought is to use ukw/fm radio transmission but i cannot 
> expect people on the street to know how to receive ukw/fm radio with 
> their phones. buying an event-licence for fm radio would only make 
> sense if the listeners come by car. not my case.
> silent disco systems also work (already tried this) but in corona 
> times this is not hygenic and for me not possible to have so many 
> receiver-headphones for an arbitrary number of listeners.
> connecting to a 'performance'-WLAN for the users with their mobile 
> device would be best. access should be easy - the users really can be 
> anyone, so maybe without any tech-knowledge. browser-based would give 
> access to anyone.
> i'm thinking about a realization similar to the sennheiser connect 
> system which distributes several audiostreams on a wlan. sennheiser 
> connect is app-based and in worst-worst-case (means android) the 
> system seems to have approx. 200ms delay. ios was faster in my 
> listening tests. the problem is that the users need an app which means 
> internet access for the installation...
> questions:
> ideas for a realization?
> how 'low-latency' could a browser based streaming in a lan/wlan be?
> would it be possible to receive AoO Audio over OSC? the question here 
> is the receiver ?app? (webPD?).
> as i found out several artists and audioengineers would be happy about 
> a solution for this: how to reach the audience in a social distancing 
> live-situation...
> thanks for any hint
> m
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