//  two sine wavse, with  moving frequencies, using Xline and Mix 
// the sine waves start at random freqs.
// lp

(

// give the variables some reasonable names
var level, env, dur;
level = 0.5;
dur = 10;

// Linen: attack time, sustain time, release time, sustain level
env = Env.linen( 0.1* dur, 0.7 * dur, 0.2 * dur, level);
play({
	
s = FSinOsc.ar(XLine.ar (1000.200.rand, 1000.200.rand, dur ), EnvGen.kr (env,1, 0, 0.8) );
t = FSinOsc.ar(XLine.ar (1000.200.rand, 1000.200.rand, dur ), EnvGen.kr (env,1, 0, 0.8) );
		Mix.ar ( [s, t])

})
)