Pd-list April 2013

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Dspstate~ in puredata
by Olivier Baudry 28 Apr '13

28 Apr '13

Dear all My idea is to get sampling rate in pd

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Re: [PD] direct connection from pd to webrowser, low latency
by onyx＠onyx-ashanti.com 28 Apr '13

28 Apr '13

>I recently worked a on a project where we wrote a custom OSC Android app >that sent control data to the patch and an app called SoundWire that >received audio on the phone and ran in the background. All communication >was over a WiFi network we setup. Latency did obviously exist but it was >manageable. > >The audio server app runs on Linux and Windows (no OSX unfortunately) >and can have multiple devices connected to it. >http://georgielabs.99k.org/SoundWireHelp.html >I'd be happy to share more details if required. yes please! that sounds perfect. i mainly need to know to bit that serves up the audio at low latencies. ive got the icecast server stuff working wirelessly to multiple devices but the latency is killing me (10-5 sec). would it be possible to use your server directly to the browser? currently, i simply need a low latency stereo audio instance to come on when they log into my network. that is it (for now) i have alot of other things i want to build around it, but i really need to know 1. what format does pd need to output to useful to... 2. a way to serve said audio out from my wireless router 3. instant sound output as soon as they login. so far, i have investigated web audio api and just started digging into the idea of feeding the audio feed as a data dump so i can at least see that it is transmitting anything-garbage-to the browser, then i can figure out how to deal with it after that is sorted. i am playing with netsend~ right now with mixed results (server connection issues). any insight is much appreciated. Onyx -- www.onyx-ashanti.com

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(no subject)
by onyx＠onyx-ashanti.com 28 Apr '13

28 Apr '13

"Onyx, is that an idea? Most cell phones do have an FM receiver. They only work with wired headset connected, functioning as antenna. As wired headsets can be cheap, just offer them for sale during the event. The good thing with FM is, it has zero latency. I got a LinexFM transmitter from here:" not for this project. I want to explore this new "everyone has a wifi capable cellphone" space for a while, without plugins or apps. I have gathered quite a bit of data to that effect in the last day or so. there are audio api's for the various browsers that do the same thing is slightly different ways. i want to trick the server into accepting the output from a network object out of pd, but i am also open to finding a low latency server like the one from kaazing. still studying though. Onyx -- www.onyx-ashanti.com

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[PD-announce] Flux >> Free App built with libPD
by stc 28 Apr '13

28 Apr '13

Dear List, Flux is a digital sound sculpture for Android devices. It is our latest artifact built with libPD. You can grab & tweak the patch, download the app from here >> http://www.binaura.net/stc/wrx/flux/ It would not be possible to build the synthesis engine without the Pd community, special respect to the RJDJ team for their high level (brilliant Vanilla-based) objects... thanks ..and share the source Yours, Binaura _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

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Pure Data Japan Launch Event will be video streamed on May. 29 2013
by Chikashi Miyama 28 Apr '13

28 Apr '13

Hi list, Sei and I have launched Pure Data Portal Website for Japanese users in February (http://puredatajapan.info) and we are very happy to announce that we will hold a launch event of our portal website in May. The entire event will be webcasted using Ustream; We have selected a venue specialized for it! The event features not only presentations and lectures but also many demos and live-performances by Japanese Pd users. For example, a user employs Pd for controlling LED-corsage, and another presenter utilizes Pd for getting data from his own touch-interfaces. We are pretty sure that the show will be inspiring even if you do not understand Japanese ; ) Website: http://tokyomax.jp/pd/ The URL of the webcast: http://2-5-d.jp Date and Time: May 29. 2013 18:30 - 23:00 JST The number of Pd users in Japan is gradually increasing. I hope Pd will soon become one of the most popular creative tools among the citizens of presumably the most geekiest country on the earth ! best regards, Chikashi Miyama (Pure Data Japan)

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direct connection from pd to webrowser, low latency
by onyx＠onyx-ashanti.com 27 Apr '13

27 Apr '13

Greetings! I hope all is well with you. I wanted to ask if i might gain some of your insight on a project i am undertaking. I am currently attempting to stream my audio into html5 capable web browsers of smartphones. i have created a local network and installed nginx as my webserver. i and a friend got everything working with the oggcast~ and mp3cast~ objects and the icecast 2 server, but the latency was horrific-5-15seconds. I would like to investigate the idea of taking advantage of the plugin-less nature of these modern fast browsers and pipe the audio directly into it as directly as possible the same way voip works but lower bandwidth and only one way. I see that udpsend~ can do alot of what i think i want, but i am confused as to how i might connect it with the audio socket in the client browser (if socket is even the right term). Any insight would be greatly appreciated. and if i get it working, as before, i will document the findings in a step by step once it works. thank you. cheers! Onyx -- www.onyx-ashanti.com

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Re: [PD] direct connection from pd to webrowser, low latency
by Varun Nair 27 Apr '13

27 Apr '13

If you are looking at the audience carrying smart phones.. I recently worked a on a project where we wrote a custom OSC Android app that sent control data to the patch and an app called SoundWire that received audio on the phone and ran in the background. All communication was over a WiFi network we setup. Latency did obviously exist but it was manageable. The audio server app runs on Linux and Windows (no OSX unfortunately) and can have multiple devices connected to it. http://georgielabs.99k.org/SoundWireHelp.html I'd be happy to share more details if required. -Varun -- Twitter: @ntkeep re-sounding.com <http://re-sounding.com> designingsound.org <http://designingsound.org> > pd-list-request(a)iem.at <mailto:pd-list-request@iem.at> > 27 April 2013 11:00 > Message: 1 > Date: Sat, 27 Apr 2013 14:13:14 +0800 > From: Simon Wise<simonzwise(a)gmail.com> > Subject: Re: [PD] direct connection from pd to webrowser, low latency > To: pd-list(a)iem.at > Message-ID:<517B6C7A.6060207(a)gmail.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 27/04/13 05:38, onyx(a)onyx-ashanti.com wrote: >> On Apr 26, 2013 10:08 PM, "katja"<katjavetter(a)gmail.com> wrote: >>> Hi Onyx, >>> >>> What is your aim, do you want to entertain your (physically present) >> audience via smart phones instead of PA system? >> >> Actually it a sonic space I want to explore. To play to people on their own >> personal "bionic ear". Click and listen. The scope for experimentation >> intrigues me. Gestural binaural processing will be fun. > > I implemented a version of an idea that had been done several times in the past > ... a silent disco, where there are two djs playing to wireless headsets over 2 > different channels ... with all sharing the same physical space. > > The result is quite fun, in our case it was in a public square and was all > powered by people jumping onto bikes hooked up to alternators etc > > (well - I did have quite a large battery in the circuit just to be sure it > wouldn't all wind down and get boring, but we did generate enough power almost > all the time) > > > Simon >

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batteries for audio cards
by Alexandre Torres Porres 26 Apr '13

26 Apr '13

hey folks, anyone have recomendations for battery packs for audio cards? wanna try some stuff going mobile, anybody doing that? Looking for some high capacity for my multiface/RME (takes 9-.12V, 2A) thanks

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Issue with csoundapi~ on Pure Data
by Rodolfo Cangiotti 26 Apr '13

26 Apr '13

Hello all, yesterday, I installed PD Extended to start experimenting the implementation of Csound in PD. On PD's preferences, I set C:\Program Files\Csound\bin as search path for csoundapi~.dll The issue is when I open Victor Lazzarini's project from C:\Program Files\Csound\examples\csoundapi_tilde, PD freezes and, when I terminate PD's process from Task Manager, Windows crashes and reboots. How to solve this?

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Re: [PD] direct connection from pd to webrowser, low latency
by onyx＠onyx-ashanti.com 25 Apr '13

25 Apr '13

I was just wondering. would it be possible to use the mp3streamout~ object to stream directly to a modern browser? to make it listen for the stream somehow, without shout/icecast, and just play? shouldnt it be as simple as; pd to mp3streamout mp3streamout to port number port to (i dont know...websocket, voodoo, tardis...) to browser, just blasting. or, possibly to create, say, 50 mp3streamouts, each with their own port, which could be served up by the webserver?basically, pd would be the server. of course i dont know what i am talking about but can any of these work On Thu, Apr 25, 2013 at 11:21 PM, onyx(a)onyx-ashanti.com < onyxashanti(a)gmail.com> wrote: > > > > On Thu, Apr 25, 2013 at 10:54 PM, august <august(a)alien.mur.at> wrote: > >> > > What kind of threshold are you looking for regarding latency? >> > >> > No more than 100ms. I feel that should be achievable with a close range >> > private network. >> >> >> hmm. I'm not so sure you'll be able to get 100ms or less. Each >> component in your set up is going to need some buffering. With >> an ideal streaming setup, you have at least 2 components: the streamer >> and the receiver, each with buffering. >> >> With your setup, you have even more: pd+oggcast, icecast, audio player. >> >> Depending on your network, you could have extra buffering for wireless , >> packet filtering etc. >> >> You might be able to whittle it down even further by dumping oggcast~ >> and then using low-latency pd+jack. Then just stream directly from jack. >> There may even be a wav streamer. If not it would be simple to write. >> > > I am open to this option. I dont see a reason why i shouldnt be able to > take the audio from something like [netsend~] and dump it to a port, then > push that out to (???) so it comes out of the browser or media player of > the device in realtime. I am very not married to oggcast or icecast or any > cast. my only real hinderance is my lack of knowledge of the protocols. > although i will say that websockets look really really good. i'm > investigating some way of creating a sort of one-way voip thing. that > definitely comes in around 50-100ms and most voip sounds pretty good even > over the internet so a local feed should be very decent. the jack idea > looks interesting. how would that work? > > Onyx > >> >> >> >> > > I assume this would be for a local network, right? >> > >> > Yes >> > >> > > If I were you, I would first try to fine-tune your current setup by >> > > getting all latency variables as low as possible (icecast, >> pd+oggcast~, >> > > and the html audio player). >> > > >> > > ICECAST: There should be config settings for it where you can manage >> > > the buffering/latency. Usually buffering/latency is good for >> streaming >> > > media since you never know what will happen on the network. >> > > >> > > oggcast~ : I'm guessing it is as low as it can go right now, but there >> > > may be an internal buffer that you can adjust/downsize. >> > > >> > > HTML audio player: Most importantly, in the HTML, you should check to >> > > make sure that the audio is not buffering. My guess is that this is >> > > where you are experiencing the largest latency. Since HTML5 is a >> > > moving target, I'm not sure how you would currently do that. May not >> > > even be possible. >> > > https://developer.mozilla.org/en-US/docs/HTML/Element/audio >> > >> > Thanks! I will check all of those tonight. Websockets for HTML 5 looks >> like >> > it might be the ticket. They seem to be catering to the gamers, so I >> think >> > that might work as well as allow future development. >> > > >> > > ... >> > > >> > > >> > > Then, if the above didn't work, you might try to hook up the output of >> > > a TCP netsend to a websocket and then translate the audio data chunks >> > > into JS Audio. UDP won't work on websockets AFAIK. >> > >> > I will try this tonight! Netsend formats the audio in a manner that the >> > Websockets understand? If that is the case, then it is Christmas! >> >> Unfortunately, it will be more like a devout catholic easter. You;ll >> have to fast for 40 days to get some candy! >> >> Websockets are pretty new and the implementation in browsers is shoddy. >> You would have to script it all yourself and then write the output in >> the browser using the html5 audio api....which is another can of worms. >> >> >> suerte! >> >> -a. >> >> > > > -- > www.onyx-ashanti.com > > > -- www.onyx-ashanti.com

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Pd-list April 2013