SamplePlayer

(
Buffer.freeAll;
s.waitForBoot({
    //buffers
    b = Dictionary.new;
    PathName(PathName(thisProcess.nowExecutingPath).pathOnly+/+"buffers").entries.do{
        arg subfolder;
        b.add(
            subfolder.folderName.asSymbol ->
            Array.fill(
                subfolder.entries.size,
                {
                    arg i;
                    Buffer.read(s, subfolder.entries[i].fullPath);
                }
            )
        );
    };

    //SynthDefs

    SynthDef(\playmono,{
        arg atk=0.001, sus=0.2, rel=0.06, c1=1, c2=(-1),
        buf=0, rate=1, spos=0, amp=1, pan=(-1), out=0;
        var sig, env;
        env = Env([0,1,1,0],[atk,sus,rel],[c1,0,c2]).kr(2);
        sig = PlayBuf.ar(1, buf, rate, startPos:spos);
        sig = sig*env;
        sig = Pan2.ar(sig, pan, amp);
        Out.ar(out, sig);
    }).add;
})
)

(
a = Pbind(*[
    instrument: \playmono,
    buf: Pseq(b[\shakers] [(1..6)],inf),
    pan: Pwhite(-1.0,1.0),
    dur: Pkey(\buf).collect(_.duration)+1,
    amp: Pwhite(0.01,0.5),
    out: 0

]).play;
)