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

[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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