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

Fri Mar 1 14:14:58 CET 2013

OMG - that's really high! Maybe Tranz have a belt holder solution - they do look kind of bulky though! Maybe worth dropping them a line, see if they'll help the Pd community 

Rich Duckworth
Lecturer in Music Technology
Department of Music
House 5 
Trinity College 
Dublin 2
Ireland
Tel 353 1 896 1500

"Digital? 
Is that the thing where they take a good old sine wave and they chop it up into little bits?" --- Rupert Neve

________________________________
 From: katja <katjavetter at gmail.com>
To: Antoine Villeret <antoine.villeret at gmail.com> 
Cc: richard duckworth <richduckworth at yahoo.com>; "pd-list at iem.at" <pd-list at iem.at> 
Sent: Friday, 1 March 2013, 13:12
Subject: Re: [PD] wireless audio from Pd to PA system (katja)

Found more info about TI's PurePath wireless. Latency of wireless transmission is 768 samples minimum. Added to this must be the latencies of ad/da conversion. 

http://e2e.ti.com/support/low_power_rf/f/382/t/110331.aspx

Forget about it, this concept is only useful for home entertainment.

Katja

On Fri, Mar 1, 2013 at 1:19 PM, katja <katjavetter at gmail.com> 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> 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>
>>
>>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
>>>
>>>
>>>
>>>
>>> 
>>>Rich Duckworth
>>>Lecturer in Music Technology
>>>Department of Music
>>>House 5 
>>>Trinity College 
>>>Dublin 2
>>>Ireland
>>>Tel 353 1 896
 1500
>>>
>>>
>>>"Digital? 
>>>Is that the thing where they take a good old sine wave and they chop it up into little bits?" --- Rupert Neve
>>>
>>>
>>>________________________________
>>> 
>>>
>>>
>>>Message: 3
>>>Date: Thu, 28 Feb 2013 11:53:43 +0100
>>>From: katja <katjavetter at gmail.com>
>>>Subject: [PD] wireless audio from Pd to PA system
>>>To: pd-list <pd-list at iem.at>
>>>Message-ID:
>>>    <CAFY0eapPSKfw+gVaxuTr7exHqLiG+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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