[PD] wireless audio from Pd to PA system (katja)

[Pierre-Olivier Boulant]

Hi,

I have a rather old pair of Sennheiser e500 wireless systems (ENG type, 
portable on both ends). On the transmitter, there is an option for line 
level. I guess the newer versions keep that option. At least this does 
work for balanced line levels with the appropriate cable and the 
gain/sensitivity set to its lowest setting.
It's rather common to use wireless between an ENG mixer and a camera.

Hope this helps
Cheers
Pierre-Olivier


On 01/03/2013 13:19, katja wrote:
> Thanks everyone for your answers.
>
> The case is unconventional because a stereo line signal must be sent 
> from the computer. Professional wireless systems assume mic or 
> instrument. Consumer systems do transmit stereo signal, but without 
> bothering too much about latency.
>
> Frankly, I did not expect the difficulty to find a good solution. 
> Initially I wanted the wearable computer for a music video which is to 
> be recorded live with sounds from natural objects. I bought the FM 
> transmitter so my cameraman will be able to hear the music while he's 
> filming. For this purpose it is ideal. Then I thought it would be good 
> to use the computer in it's wearable mode for public performance. I 
> figured that one of the many wireless solutions would suit the 
> purpose, but didn't reckon with the unusual requirements.
>
> Further searching brought me to a new technology 'PurePath' from Texas 
> Instruments. It has a range comparable with WiFi (30m), while it seems 
> to work with paired devices as in Bluetooth. I haven't seen consumer 
> products with this technology, but development kits are available. A 
> rather convincing demo is here:
>
> http://www.youtube.com/watch?v=0YsnZQUfVGs
>
> If this system can work with low latency it could be perfect for 
> wireless Pd.
>
> Katja
>
>
>
> On Fri, Mar 1, 2013 at 11:41 AM, Antoine Villeret 
> <antoine.villeret at gmail.com <mailto:antoine.villeret at gmail.com>> wrote:
>
>     hello,
>
>     those are good for what they have been designed for and it depends
>     on what you mean by "exellent sound quality"
>
>     I've made few tests on those few years ago and the bandwidth could
>     be good enough to transmit guitar/bass signal but nothing else for me
>
>     +
>     a
>
>
>     --
>     do it yourself
>     http://antoine.villeret.free.fr
>
>
>     2013/2/28 richard duckworth <richduckworth at yahoo.com
>     <mailto:richduckworth at yahoo.com>>
>
>         Hi Katja
>         one of these would do it - check with Thomann tech support for
>         gain issues (these are Instrument Level input) They should be
>         fine however as active guitar pickups (like heavy style EMG
>         pickups) output quite high levels. These type of wireless
>         systems tend to be very rugged, have excellent sound quality
>         and long battery life - and you'll want these things.
>
>         http://www.thomann.de/ie/cat.html?gf=wireless_for_guitar_bass&oa=pra
>
>
>
>
>
>         Message: 3
>         Date: Thu, 28 Feb 2013 11:53:43 +0100
>         From: katja <katjavetter at gmail.com <mailto:katjavetter at gmail.com>>
>         Subject: [PD] wireless audio from Pd to PA system
>         To: pd-list <pd-list at iem.at <mailto:pd-list at iem.at>>
>         Message-ID:
>            
>         <CAFY0eapPSKfw+gVaxuTr7exHqLiG+pTdu8Rk6SNTraLiys2Msg at mail.gmail.com
>         <mailto:pTdu8Rk6SNTraLiys2Msg at mail.gmail.com>>
>         Content-Type: text/plain; charset=ISO-8859-1
>
>         For a wearable live performance computer, I am looking into the
>         options of sending wireless audio from Pd to a PA sound system and
>         other listeners.
>
>         In a first experiment I've tried a Linex FM transmitter. Audio
>         quality
>         is good enough, and FM transmitters do not introduce latency. This
>         option is cheap and flexible, as the signal can be received by
>         simple
>         radio's, which are even built into cell phones and media
>         players. I
>         would need to boost the transmission a bit to make it more
>         reliable.
>         This will of course make the equipment illegal. Even then, the
>         risk
>         that someone else is transmitting a stronger signal on the
>         channel can
>         not be excluded.
>
>         Another option could be to send audio over Wifi. This would
>         require
>         WLAN to be available, and one extra computer (with audio
>         interface) as
>         a receiver. To avoid extra latency the audio should be sent
>         uncompressed, like [udpsend~] / [udpreceive~] can do it. This
>         has the
>         risk of packet loss and serious dropouts.
>
>         I've been searching for 2.4 GHz wireless music receivers and found
>         things like this:
>         http://www.sitecom.com/en/wireless-music-streamer/wl-061/p/203. They
>         seem to act like external soundcards for your computer. In Linux
>         though I've never managed to properly connect multiple
>         soundcards with
>         Pd (in OSX it's easy using the Aggregate Device Editor from
>         Audio MIDI
>         Setup). Also I guess these devices introduce huge latency.
>         With audio
>         over bluetooth headsets I've experienced latencies up to a second.
>
>         Does anyone use a satisfactory method in practice, to send
>         audio from
>         Pd without wires?
>
>         Thanks,
>         Katja
>

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