(
SynthDef(
    \kick,
    {
        |freq = 80, gate = 1, cutoff = 400, rez = 0.5, decay = 0.1|

        var osc = SinOsc.ar(freq) + LFPulse.ar(freq / 2, mul: Line.ar(1, 0, 0.25, 0.25)) ;

        //var osc = LFPulse.ar(freq);
        var env = EnvGen.kr(
            Env.adsr(attackTime: 0.001, decayTime: decay, sustainLevel: 0, curve: \cub ),
            gate,
            doneAction: 2
        );
        var flt = RLPF.ar(osc, cutoff, rez);
        var pan = Pan2.ar(flt * env, Rand(-1, 1));
        var fx = Pan2.ar(CombC.ar(pan, maxdelaytime: 1,  mul: 0.25),  0.25);
        Out.ar(0, fx + pan)
    }
).add;
)