diff --git a/ephemera.sc b/ephemera.sc
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+///// // / /    /   / / /     /
+//
+// supercollider tests
+//
+////// /  /
+
+
+"e p h e m e r a l   g a r d e n".postln;
+
+
+// sc server
+s = Server.local;
+//s.options.memSize = 1024 * 1024;
+//s.options.maxNodes = 1024 * 1024;
+//s.options.numBuffers  = 1024 * 1024 * 1024;
+//s.latency = 0.05;
+s.options.sampleRate = 44100;
+s.boot;
+
+"...".postln;
+
+
+~background = {
+
+    "background >> ".post;
+    
+    // list of soundfiles
+   ~sources = [
+        "/home/pi/snd/39-incomprehensible-restaurtant-chatter-02.wav",
+        "/home/pi/snd/39-incomprehensible-restaurtant-chatter-03.wav",
+        "/home/pi/snd/39-incomprehensible-restaurtant-chatter-04.wav",
+        "/home/pi/snd/46-afternoon-chorus-02.wav",
+        "/home/pi/snd/46-afternoon-chorus-03.wav",
+        "/home/pi/snd/46-afternoon-chorus-04.wav",
+    ];
+    
+    // select random element from the list
+    ~file = ~sources.choose;
+    ~file.postln;
+
+    // read file then play buffer
+    Buffer.read (server: s, path: ~file, action: ~play1); 
+};
+
+~foreground = {
+
+    "foreground >> ".post;
+    
+    // list of soundfiles
+    ~sources = [
+        "/home/pi/snd/26-multilayered-conversations-01.wav",
+        "/home/pi/snd/26-multilayered-conversations-02.wav",
+        "/home/pi/snd/39-incomprehensible-restaurtant-chatter-02.wav",
+        "/home/pi/snd/39-incomprehensible-restaurtant-chatter-03.wav",
+        "/home/pi/snd/39-incomprehensible-restaurtant-chatter-04.wav",
+        "/home/pi/snd/26-party-chatter-02.wav",
+        "/home/pi/snd/26-party-chatter-03.wav",
+        "/home/pi/snd/26-party-chatter-04.wav",
+        "/home/pi/snd/06-uw-pebbles-urchins-waves.wav",
+        "/home/pi/snd/17-uw-waves-crashing-on-pebble-beach-slow.wav"
+    ];
+    
+    // select random element from the list
+    ~file = ~sources.choose;
+    ~file.postln;
+
+    // read file then play buffer
+    Buffer.read (server: s, path: ~file, action: ~play2); 
+};
+
+~play1 = { arg b1;
+    Routine {
+        "~play [bg - ".post; b1.path.post; "]".postln;
+
+        {(PlayBuf.ar(1, b1, rate: 1, loop: 0, doneAction: 2) * 0.1).dup }.play.waitForFree;
+        // free buffer once done?
+     
+        "freed [bg - ".post; b1.path.post; "]".postln;
+        b1.free
+	~background.value; 
+    }.play;
+};
+
+~play2 = { arg b2;
+    Routine {
+        "~play [fg - ".post; b2.path.post; "]".postln;
+
+        {(PlayBuf.ar(1, b2, rate: 1, loop: 0, doneAction: 2) * 0.1).dup }.play.waitForFree;
+        // free buffer once done?
+        
+        "freed [fg - ".post; b2.path.post; "]".postln;
+        b2.free;       
+        ~foreground.value; 
+    }.play;
+};
+
+
+s.waitForBoot {
+    "booted...".postln;
+
+    i = 0;
+    j = 0;
+    p = 2; // how many background layers?
+    q = 3;  // how many foreground layers?
+
+    while ( { i < p }, { i = i + 1; ~background.value;});
+    while ( { j < q }, { j = j + 1; ~foreground.value;});
+
+};
+
+// 167/31 -> 175/31 -> 168/31
+
+
+//   via http://danielnouri.org/docs/SuperColliderHelp/Tutorials/Getting-Started/Buffers.html 
+// Streaming a File in From Disk
+
+
+// In some cases, for instance when working with very large files, you might not want to load a sound completely into memory. Instead, you can stream it in from disk a bit at a time, using the UGen DiskIn, and Buffer's 'cueSoundFile' method:
+
+		// (
+		// SynthDef("tutorial-Buffer-cue",{ arg out=0,bufnum;
+		// 	Out.ar(out,
+		// 		DiskIn.ar( 1, bufnum )
+		// 	)
+
+		// }).send(s);
+		// )
+
+
+		// b = Buffer.cueSoundFile(s,"sounds/a11wlk01-44_1.aiff", 0, 1);
+		// y = Synth.new("tutorial-Buffer-cue", [\bufnum,b.bufnum], s);
+
+		// b.free; y.free;
+
+
+// This is not as flexible as PlayBuf (no rate control), but can save memory.
\ No newline at end of file