diff --git a/manual/apmodlevel2hsv.tex b/manual/apmodlevel2hsv.tex
index e5c0e6fd..8351853d 100644
--- a/manual/apmodlevel2hsv.tex
+++ b/manual/apmodlevel2hsv.tex
@@ -33,3 +33,7 @@
 \end{tabularx}
 }
 \end{snugshade}
+
+OSC control:
+
+\input{oscdoc_tascar_ap_level2hsv.tex}
diff --git a/manual/oscdoc_tascar_ap_level2hsv.tex b/manual/oscdoc_tascar_ap_level2hsv.tex
new file mode 100644
index 00000000..442b7753
--- /dev/null
+++ b/manual/oscdoc_tascar_ap_level2hsv.tex
@@ -0,0 +1,18 @@
+\definecolor{shadecolor}{RGB}{236,236,255}\begin{snugshade}
+{\footnotesize
+\label{osctab:tascaraplevel2hsv}
+OSC variables:
+\nopagebreak
+
+\begin{tabularx}{\textwidth}{llllX}
+\hline
+path & fmt. & range & r. & description\\
+\hline
+\attr{/.../active} & i & bool & yes & \\
+\attr{/.../hue} & f &  & yes & Hue component (0-360 degree)\\
+\attr{/.../saturation} & f &  & yes & Saturation component (0-1)\\
+\hline
+\end{tabularx}
+}
+\end{snugshade}
+\definecolor{shadecolor}{RGB}{255,230,204}
diff --git a/plugins/src/tascar_ap_level2hsv.cc b/plugins/src/tascar_ap_level2hsv.cc
index a7aaa4bf..476898dc 100644
--- a/plugins/src/tascar_ap_level2hsv.cc
+++ b/plugins/src/tascar_ap_level2hsv.cc
@@ -36,6 +36,7 @@ class level2hsv_t : public TASCAR::audioplugin_base_t {
   level2hsv_t(const TASCAR::audioplugin_cfg_t& cfg);
   void ap_process(std::vector<TASCAR::wave_t>& chunk, const TASCAR::pos_t& pos,
                   const TASCAR::zyx_euler_t&, const TASCAR::transport_t& tp);
+  void add_variables(TASCAR::osc_server_t* srv);
   void configure();
   void release();
   ~level2hsv_t();
@@ -50,6 +51,7 @@ class level2hsv_t : public TASCAR::audioplugin_base_t {
   TASCAR::levelmeter::weight_t weight = TASCAR::levelmeter::Z;
   std::vector<float> frange = {62.5f, 4000.0f};
   std::vector<float> lrange = {40.0f, 90.0f};
+  bool active = true;
   // float value = 0;
   // derived variables:
   levelmode_t imode = dbspl;
@@ -76,6 +78,7 @@ level2hsv_t::level2hsv_t(const TASCAR::audioplugin_cfg_t& cfg)
   GET_ATTRIBUTE(tau, "s", "Leq duration, or 0 to use block size");
   GET_ATTRIBUTE(hue, "degree", "Hue component (0-360)");
   GET_ATTRIBUTE(saturation, "", "Saturation component (0-1)");
+  GET_ATTRIBUTE_BOOL(active, "start activated");
   std::string mode("dbspl");
   GET_ATTRIBUTE(mode, "", "Level mode [dbspl|rms|max]");
   if(mode == "dbspl")
@@ -107,6 +110,16 @@ level2hsv_t::level2hsv_t(const TASCAR::audioplugin_cfg_t& cfg)
   thread = std::thread(&level2hsv_t::sendthread, this);
 }
 
+void level2hsv_t::add_variables(TASCAR::osc_server_t* srv)
+{
+  srv->set_variable_owner(
+      TASCAR::strrep(TASCAR::tscbasename(__FILE__), ".cc", ""));
+  srv->add_bool("/active", &active);
+  srv->add_float("/hue", &hue, "", "Hue component (0-360 degree)");
+  srv->add_float("/saturation", &saturation, "", "Saturation component (0-1)");
+  srv->unset_variable_owner();
+}
+
 void level2hsv_t::sendthread()
 {
   std::unique_lock<std::mutex> lk(mtx);