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 <katjavet...@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.ville...@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 <richduckwo...@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 <katjavet...@gmail.com> >>> Subject: [PD] wireless audio from Pd to PA system >>> To: pd-list <pd-list@iem.at> >>> Message-ID: >>> <cafy0eappskfw+gvaxutr7exhqlig+ptdu8rk6sntraliys2...@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 >>> >>> >>> >>> ------------------------------ >>> >>> _______________________________________________ >>> Pd-list mailing list >>> Pd-list@iem.at >>> to manage your subscription (including un-subscription) see >>> http://lists.puredata.info/listinfo/pd-list >>> >>> >>> End of Pd-list Digest, Vol 95, Issue 152 >>> **************************************** >>> >>> >>> >>> _______________________________________________ >>> Pd-list@iem.at mailing list >>> UNSUBSCRIBE and account-management -> >>> http://lists.puredata.info/listinfo/pd-list >>> >>> >> >> _______________________________________________ >> Pd-list@iem.at mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> >> >
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