Hello there I am doing “classes” and “objects” and i ‘ve the next problem in the code : // Simple example of sound making class class Simple { //sound chain Impulse imp => ResonZ filt => dac; // some default settings 100.0 => filt.Q => filt.gain; 1000.0 => filt.freq; fun void freq(float f) { f => filt.freq; } fun void setQ(float Q) { Q => filt.Q => filt.gain; } fun void setGain(float g) { g => imp.gain; } fun void noteOn (float volume) { volume => imp.next; } } Simple s; while(true) { Math.random2f(1100.0, 1200.0) => s.freq; Math.random2(1,200) => s.setQ; Math.random2f(.2,.8) => s.setGain; // play note 1 => s.noteOn; .1::second => now; } My console monitor return: [Untitled]:line(3): ugen's of type 'DAC' have no input - cannot => from another ugen... [simple_class]:line(5): ugen's of type 'DAC' have no input - cannot => from another ugen... Someone knows what is happening Thank you