Pd-list March 2013

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104 participants
145 discussions

Pd on the RPi with multiple audio out
by Antoine Villeret 01 Mar '13

01 Mar '13

hi, the ESI UDJ6 USB sound card works on the raspberry pi with pd and alsa driver. UDJ6 provide 6 output channel and no input. I have 6 channels @ 44,1 kHz and 48 kHz in 24 bit depth Blocksize of 64 samples and 9 ms of latency no click when playing wav file direct from SD card ESI UDJ 6 can be used ar 96 kHz but I can't do it with pd and I'm not interested in because only 2 channels are available at this frequency cheers antoine -- do it yourself http://antoine.villeret.free.fr

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Retrieve overwritten audio from [writesf~]?
by Julian Brooks 01 Mar '13

01 Mar '13

Hello, So, I've just accidently caught the message box attached to writesf~ and deleted the audio that I just recorded as I sent an 'open' message with the same name as the file I'd previously recorded. Apart from it being a grim lesson I'm now curious. Where will that original file have gone? and is it completely gone or will it be 'stashed' somewhere? I've accepted the loss (through gritted teeth), but am still curious if anyone knows and in case it happens again, though not something I'm planning on if I can possibly help it? I'm on debian btw. Cheers, Julian

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Re: [PD] wireless audio from Pd to PA system (katja) (Antoine Villeret)
by richard duckworth 01 Mar '13

01 Mar '13

http://pro.sony.com/bbsc/ssr/product-DWZB30GB/ The Sony's 10 Hz to 22 kHz - looks like acceptable bandwidth for everyday live stage stuff. Unless you're expecting analogue pro-audio 40kHz & above (most pro-audio) or analogue 80kHz - 120 kHz (nice pro-audio Neve etc.) There's SM Pro's 'TRANz' wireless DI box too - in living stereo no less: http://www.smproaudio.com/index.php/en/products/di-boxes/tranz I think contemporary wireless systems are expected to perform to more high-fidelity specs than their bandwidth-challenged cousins of yore (Nady et al). The forums GearSlutz or TapeOp might turn up some answers too as the users are very knowledgable and come from many different pro audio backgrounds. My mate worked on The Wall and he showed me the wireless systems that they were using and introduced me to the 'wireless manager'. These systems were not 'reduced bandwith' - unless you're talking about transmitting HD about the place, and I've no idea how you would do that - i'm sure there's some gruesomely expensive system that would do it :) Rich "Digital? Is that the thing where they take a good old sine wave and they chop it up into little bits?" --- Rupert Neve ________________________________ From: "pd-list-request(a)iem.at" <pd-list-request(a)iem.at> To: pd-list(a)iem.at Sent: Friday, 1 March 2013, 11:00 Subject: Pd-list Digest, Vol 96, Issue 2 Send Pd-list mailing list submissions to pd-list(a)iem.at To subscribe or unsubscribe via the World Wide Web, visit http://lists.puredata.info/listinfo/pd-list or, via email, send a message with subject or body 'help' to pd-list-request(a)iem.at You can reach the person managing the list at pd-list-owner(a)iem.at When replying, please edit your Subject line so it is more specific than "Re: Contents of Pd-list digest..." Today's Topics: 1. Re: wireless audio from Pd to PA system (katja) (Antoine Villeret) ---------------------------------------------------------------------- Message: 1 Date: Fri, 1 Mar 2013 11:41:36 +0100 From: Antoine Villeret <antoine.villeret(a)gmail.com> Subject: Re: [PD] wireless audio from Pd to PA system (katja) To: richard duckworth <richduckworth(a)yahoo.com> Cc: "pd-list(a)iem.at" <pd-list(a)iem.at> Message-ID: <CAGn5wNfjsYQz+kzexRCd25F3--6f4hGW7TZY4Br23tpznwnGag(a)mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" 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(a)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(a)gmail.com> > Subject: [PD] wireless audio from Pd to PA system > To: pd-list <pd-list(a)iem.at> > Message-ID: > <CAFY0eapPSKfw+gVaxuTr7exHqLiG+pTdu8Rk6SNTraLiys2Msg(a)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(a)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(a)iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >

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wireless audio from Pd to PA system
by katja 01 Mar '13

01 Mar '13

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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convert an image into a string of characters
by ronni montoya 01 Mar '13

01 Mar '13

Hi, i was wondering how can i convert an image into a string of characters in pd? Is there is an easy way of doing this? cheers R.

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Pd-list March 2013