Archive for June, 2009

Silentium @ AZ Aachen Live Mix

silentium

This was recorded “@home” in Aachen during a party at AZ
one of my n1 locations.
I don’t really have a play list, but feel free to ask !

Silentium

 

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Live Mix fall 2008 Hamburg

silentium

This was recorded last year in Hamburg. Really amazing city !

Silentium

 

Play list:

Network (youtube version http://www.youtube.com/watch?v=MTN3s2iVKKI)
Ed Rush & Optical / Sonic & Silver
Future Signal Death Mask
Prolix Free Fall
Pacman (The Upbeats RMX)
j.majik & Wickaman crazyworld
Subfocus Timewarp
Callide – Nuclear Warhead / Pure Dubplate
Markman & Tsunami the furyan
Chris.su Double Axle
Vicious Circle & Nocturnal Welcome to Shanktown VIP
Kali Tokyo
JB react
Regula Junked up
Silver vs Simian We are your Friends (Silver RMX)
Nero vs Klaxons it’s not over
French Kiss
Smack my Bitch up (subfocus rmx)

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Live audio visualization in flash pt I

bytearray

Just for a short overview,

I sometimes play drum and bass on parties. To improve the audience experience, I use flash to visualize the digital culture I’m living. For this, I wrote some applications in flash and air. These apps are more experiments to find out how my sound can influence visual media to generate a special atmosphere.

Sometimes some people notice what I am doing or know what is happening. Therefore, questions came up and it is difficult to have a productive conversation at a party….

So why flash?

I think the main reason was that I wanted to experiment with Flash and later on with the new features of the player 10.

So let us get started.

The first step to reach the stuff I had in mind was to grab the audio signal. I have a line-in, so let us take a look what possibilities I have in flash to use this. I found the flash.media package providing some classes to access the microphone and the sound spectrum. I found out that it was not really easy to get apply the computeSpectrum method on the microphone. So I thought. O.K. I’ll code a Java app that catches the audio signal, computes spectrum and send this data as bytearray to flash. However, this was not very cool, even having some java code, I could re use and I wanted to stay with flash.

I explored the possibilities and none of them were easy and latency efficient for my purposes. I really needed some time to find the solution and it was sooo simple !

Setup a streaming Server on your computer. My choice after some tests was Icecast2 here is a sample of my config:

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<icecast>
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	<limits>
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        	<sources>2</sources>
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 <queue-size>0</queue-size>
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 <burst-on-connect>1</burst-on-connect>
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 <burst-size>0</burst-size> 
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    </limits>
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    <authentication>
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        <source-password>hackme</source-password>
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        <relay-password>hackme</relay-password>
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        <admin-user>admin</admin-user>
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        <admin-password>hackme</admin-password>
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    </authentication>
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    <hostname>localhost</hostname>
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	<listen-socket>
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<port>6666</port>
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    </listen-socket>
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    <fileserve>1</fileserve>
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<paths>
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        <logdir>./logs</logdir>
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        <webroot>./web</webroot>
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        <adminroot>./admin</adminroot>
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        <alias source="/" dest="/status.xsl">
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    </alias>
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    <logging>
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        <accesslog>access.log</accesslog>
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        <errorlog>error.log</errorlog>
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      	<loglevel>3</loglevel> <!-- 4 Debug, 3 Info, 2 Warn, 1 Error -->
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</logging></paths></icecast>

Setup a streaming client on your computer like Edcast and choose the right audio in.

When you get this programs running you will have a streaming server running under the following URL:

http://localhost:6666/stream

or if you are using shoutcast :

….. /;stream.nsv

So now, you can catch this audio stream from your flash app like this:

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this._sfx = new Sound();
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var req:URLRequest = new URLRequest("http://localhost:6666/stream");// /;stream.nsv
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var context:SoundLoaderContext = new SoundLoaderContext(0, false);
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this._sfx.load(req, context);
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this._channel = this._sfx.play();
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SoundMixer.bufferTime=0;  // works for me locally
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Now you can get the spectrum over an onEnterFrame Event with SoundMixer.computeSpectrum. I am going to explain this in part II

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