diff --git a/Classes/BuboBoot.sc b/Classes/BuboBoot.sc
index 6e306ff..d82c163 100644
--- a/Classes/BuboBoot.sc
+++ b/Classes/BuboBoot.sc
@@ -105,10 +105,10 @@ Boot {
 
       Event.addEventType(\buboEvent, {
         arg server;
-        if (BuboUtils.stringIsNumber(~sp), {}, {
-          ~sp = BuboUtils.cleanSampleName(~sp);
-          ~nb = BuboUtils.cleanSampleIndex(~nb);
-          if (~sp.notNil && ~nb.notNil, {
+        if (~sp.notNil, {
+          if (BuboUtils.stringIsNumber(~sp), {}, {
+            ~sp = BuboUtils.cleanSampleName(~sp);
+            ~nb = BuboUtils.cleanSampleIndex(~nb);
             if (~sp !== "", {
               ~buf = Bank(~sp)[~nb % Bank(~sp).paths.size];
               if (Bank(~sp).metadata[~nb % Bank(~sp).size][\numChannels] == 1) {
@@ -116,7 +116,7 @@ Boot {
               } {
                   ~instrument = \splayer;
               };
-            })
+            });
           });
         });
         ~type = \note;
diff --git a/Classes/BuboEvents.sc b/Classes/BuboEvents.sc
new file mode 100644
index 0000000..b9e8108
--- /dev/null
+++ b/Classes/BuboEvents.sc
@@ -0,0 +1,3 @@
+BuboEvents {
+
+}
diff --git a/Classes/BuboUtils.sc b/Classes/BuboUtils.sc
index 5f26f9c..018dd9f 100644
--- a/Classes/BuboUtils.sc
+++ b/Classes/BuboUtils.sc
@@ -25,7 +25,7 @@ BuboUtils {
 
   *stringIsNumber {
     arg string;
-    if (string == nil, { ^true });
+    if (string == nil || string == "", { ^false });
     string = string.asList.collect({arg char; char.ascii});
     string = (48..57).includesAll(string);
     ^string
diff --git a/Classes/Configuration/Startup.scd b/Classes/Configuration/Startup.scd
index 51f56bf..49be4b5 100644
--- a/Classes/Configuration/Startup.scd
+++ b/Classes/Configuration/Startup.scd
@@ -1,6 +1,5 @@
 // Setting up MIDI for hardware performances
 "Initialising MIDI...".postln;
-MIDIClient.init;
 p = currentEnvironment;
 c = currentEnvironment.clock;
 
diff --git a/Classes/Configuration/Synthdefs.scd b/Classes/Configuration/Synthdefs.scd
index 88269da..2927902 100644
--- a/Classes/Configuration/Synthdefs.scd
+++ b/Classes/Configuration/Synthdefs.scd
@@ -271,26 +271,25 @@ d.list = { arg obj; obj.keys.do({arg i; i.postln}); };
   d.tides = z;
 );
 
-(
-  z = SynthDef('pink', {
-    arg out;
-    var pink = PinkTrombone.ar(
-      noiseSource: BPF.ar(WhiteNoise.ar(), \noiseFilter.kr(2000)),
-      freq: \freq.kr(800),
-      tenseness: \tenseness.kr(0.4),
-      tongueIndex: \tongueIndex.kr(30),
-      tongueDiameter: \tongueDiameter.kr(3.5),
-      constrictionX: \constrictionX.kr(1.5),
-      constrictionY: \constrictionY.kr(2.5),
-      fricativeIntens: \fricativeIntens.kr(1.5)
-    );
-    var env = Env.perc(\attack.kr(0.01), releaseTime: \release.kr(2.0)).kr(doneAction: 2);
-    var sound = pink * env;
-    OffsetOut.ar(out, Pan2.ar(sound, pos: \pan.kr(0.0)))
-  }).add;
-  d.pink = z;
-);
-
+// (
+//   z = SynthDef('pink', {
+//     arg out;
+//     var pink = PinkTrombone.ar(
+//       noiseSource: BPF.ar(WhiteNoise.ar(), \noiseFilter.kr(2000)),
+//       freq: \freq.kr(800),
+//       tenseness: \tenseness.kr(0.4),
+//       tongueIndex: \tongueIndex.kr(30),
+//       tongueDiameter: \tongueDiameter.kr(3.5),
+//       constrictionX: \constrictionX.kr(1.5),
+//       constrictionY: \constrictionY.kr(2.5),
+//       fricativeIntens: \fricativeIntens.kr(1.5)
+//     );
+//     var env = Env.perc(\attack.kr(0.01), releaseTime: \release.kr(2.0)).kr(doneAction: 2);
+//     var sound = pink * env;
+//     OffsetOut.ar(out, Pan2.ar(sound, pos: \pan.kr(0.0)))
+//   }).add;
+//   d.pink = z;
+// );
 
 (
   z = SynthDef('kick', {
diff --git a/Classes/EventShortener.sc b/Classes/EventShortener.sc
index d7473fa..ac63085 100644
--- a/Classes/EventShortener.sc
+++ b/Classes/EventShortener.sc
@@ -67,18 +67,16 @@ EventShortener {
               });
             });
           ];
+          new_pattern = new_pattern ++ [
+            sp: Pfunc { |e| e.str ? "" },
+            nb: Pfunc { |e| e.num ? 0 }
+          ];
         }, {
           new_pattern = new_pattern ++ [a, b];
         });
       });
     });
-
-    if (pattern.includes('i') || pattern.includes('instrument') == false, {
-      new_pattern = new_pattern ++ [
-        sp: Pfunc { |e| e.str ? "" },
-        nb: Pfunc { |e| e.num ? 0 }
-      ];
-    });
+    new_pattern.postln;
     ^new_pattern
   }
 
diff --git a/dev_sessions/chasing_bugs.scd b/dev_sessions/chasing_bugs.scd
new file mode 100644
index 0000000..51cd9ac
--- /dev/null
+++ b/dev_sessions/chasing_bugs.scd
@@ -0,0 +1,27 @@
+(
+Boot(samplePath: "/Users/bubo/.config/livecoding/samples");
+)
+
+// TEST: [X] ça passe
+(
+~basic => [pat: "kick snare"];
+~basic.play;
+
+~hat => [pat: "hat:2 hat:4!3"];
+~hat.play;
+)
+
+// TEST: [X] ça passe
+(
+~basic => [
+  sp: "kick",
+  nb: [0, 2, 3].pseq(inf),
+];
+~basic.play;
+)
+
+(
+~hat => [sp: "hat", dur: 1/2, nb: [0, 2, 3].pseq(inf)];
+~hat.play;
+)
+