Le 28/05/2019 à 13:20, mgraves mstvp.com a écrit :
Marc,
I'm well and truly intimate with WebRTC. The trouble with IP-based connectivity
is then latency involved with packetization.
Then my hack would not be useful if you need reatime connectivity. For a
good quality 256Kps Opus stream (24bit, 48Khz), latency was ~130ms with
a 2.4Mhz wifi connection. Maybe it could be improved.
DECT and BT links don't suffer this, but they tend to be bandwidth constrained
(especially microphone freq response.)
It's surprising that there are very few headsets with full bandwidth
microphone. Those that are, like the DPA D:Fine service, are offered for
stage/theatrical performance. They assume separate belt-packs for microphone vs
monitoring.
The market share is probably too small; most wireless headsets are now
being used with phones.
Marc
Michael Graves
mgra...@mstvp.com
http://www.mgraves.org
o(713) 861-4005
c(713) 201-1262
sip:mgra...@mjg.onsip.com
skype mjgraves
-----Original Message-----
From: Sursound <sursound-boun...@music.vt.edu> On Behalf Of Marc Lavallée
Sent: Tuesday, May 28, 2019 10:37 AM
To: sursound@music.vt.edu
Subject: [Sursound] wifi audio (was Re: Deconstructing soundbar marketing B.S.)
Le 28/05/2019 à 10:48, mgraves mstvp.com a écrit :
Marc,
This is very interesting to me. Did you do this using Wi-Fi or some other
wireless scheme?
What I've been seeking is a low-cost, low-latency wireless solution for a
headset.
We have good, full-bandwidth solutions for wireless microphones. Also for
wireless performance monitors. Nothing that combines these functions.
Hi Michael.
My hack was not bidirectional (it could be), but I suspect that the WebRTC
standard could be used on a phone, a small standalone computer or some of the
newest iOT micro-controller with Wifi and full-duplex audio.
I have no idea how "better" it would be compared to available Bluetooth
headsets. And it would not be cheaper... A good start would be to design an Android
WebRTC app for your specific use case, and maybe this app already exist.
Marc
Michael Graves
mgra...@mstvp.com
http://www.mgraves.org
o(713) 861-4005
c(713) 201-1262
sip:mgra...@mjg.onsip.com
skype mjgraves
-----Original Message-----
From: Sursound <sursound-boun...@music.vt.edu> On Behalf Of Marc Lavallée
Sent: Tuesday, May 28, 2019 7:20 AM
To: sursound@music.vt.edu
Subject: Re: [Sursound] Deconstructing soundbar marketing B.S.
Last year I hacked a "low latency" (~100ms) stereo RTP streaming software
between OSX and a Raspberry Pi. A possible solution would be, as Bo Erik suggested, to
stream 4-channel on a musticast wifi network, then decode it on 4 RPIs (or similar
boards), making sure they are in sync (using PTP). This is on my long list of things to
try, but I would need a specific project to kick-start this exploration. I'm in the
process of setting up a 4-channel system in my home office (using two
2.1 DIY "multimedia" system), so it's a good start. We could wait for the industry to
provide something usable, but it would be proprietary, "professional", and expensive
(because of the super-specific gold-plated hardware, patents, shareholders, marketing, logos, slick
web sites, religious beliefs, etc). Also (who knows) maybe it's already possible to do it using the
jack2 software suite.
Marc
Le 28/05/2019 à 07:40, Augustine Leudar a écrit :
Weve tried local wifi networks at shows before but it was a bit
unreliable for droppouts etc then again so is Bluetooth. FOr home us it would
be fine.
Four plug sockets might be a bit more doable than audio cables as well.
Wasn't there someone on here who was doing something DIY with the
rasberry pie ? Anyway it would nice to bring something commercially viable to
market.
On Tue, 28 May 2019 at 09:39, Bo-Erik Sandholm <bosses...@gmail.com> wrote:
The Speakers won't be wireless as you probably want them to be powered.
But it should be easy with bluetooth 4.0 or Wi-Fi direct to create a
solution.
Normal Wi-Fi could be used.
The low cost esp8266 makes this possible in a diy setup...
Stream a 4 channel audiostream to the 4 speakers.
Have a switch on each speaker to select which channel it will playback.
Could possibly be solved by streaming 2 stereo channels on 2
different ip ports over WiFi instead. 😎
Bo-Erik
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