diff --git a/libtascar/include/levelmeter.h b/libtascar/include/levelmeter.h
index ff9d0fe4..6f65335b 100644
--- a/libtascar/include/levelmeter.h
+++ b/libtascar/include/levelmeter.h
@@ -20,8 +20,8 @@
 #ifndef LEVELMETER_H
 #define LEVELMETER_H
 
-#include "tscconfig.h"
 #include "filterclass.h"
+#include "tscconfig.h"
 
 namespace TASCAR {
 
@@ -35,7 +35,7 @@ namespace TASCAR {
      \ingroup levels
    */
   class levelmeter_t : public TASCAR::wave_t {
-    public:
+  public:
     /**
        \param fs Audio sampling rate in Hz
        \param tc Time constant in seconds
@@ -46,7 +46,7 @@ namespace TASCAR {
        Change meter weighting during runtime
      */
     void set_weight(levelmeter::weight_t weight);
-    levelmeter::weight_t get_weight() const { return w;};
+    levelmeter::weight_t get_weight() const { return w; };
     /**
        \brief Add audio samples to level meter container
        \param src Audio samples
@@ -57,11 +57,14 @@ namespace TASCAR {
        \retval rms RMS value in dB SPL
        \retval peak Peak value in dB
      */
-    void get_rms_and_peak( float& rms, float& peak ) const;
+    void get_rms_and_peak(float& rms, float& peak) const;
     /**
-       \brief Return percentile levels, similar to ISMADHA standard for hearing aids analysis.
+       \brief Return percentile levels, similar to ISMADHA standard for hearing
+       aids analysis.
      */
-    void get_percentile_levels( float& q30, float& q50, float& q65, float& g95, float& q99 ) const;
+    void get_percentile_levels(float& q30, float& q50, float& q65, float& g95,
+                               float& q99) const;
+
   private:
     TASCAR::levelmeter::weight_t w;
     uint32_t segment_length;
@@ -72,12 +75,16 @@ namespace TASCAR {
     uint32_t i65;
     uint32_t i95;
     uint32_t i99;
+
+  public:
     bandpass_t bp;
+
+  private:
     bandpass_t bp_C;
     aweighting_t flt_A;
   };
 
-}
+} // namespace TASCAR
 
 #endif
 
diff --git a/manual/apmodlevel2hsv.tex b/manual/apmodlevel2hsv.tex
new file mode 100644
index 00000000..e5c0e6fd
--- /dev/null
+++ b/manual/apmodlevel2hsv.tex
@@ -0,0 +1,35 @@
+Convert sound pressure level to value component of a lamp.
+
+\definecolor{shadecolor}{RGB}{255,230,204}\begin{snugshade}
+{\footnotesize
+\label{attrtab:level2hsv}
+Attributes of element {\bf level2hsv}\nopagebreak
+
+\begin{tabularx}{\textwidth}{lXl}
+\hline
+name & description (type, unit) & def.\\
+\hline
+\hline
+\indattr{frange} & Frequency range in bandpass mode (float array, Hz) & 62.5 4000\\
+\hline
+\indattr{hue} & Hue component (0-360) (float, degree) & 0\\
+\hline
+\indattr{lrange} & Level range (float array, dB) & 40 90\\
+\hline
+\indattr{mode} & Level mode [dbspl|rms|max] (string) & dbspl\\
+\hline
+\indattr{path} & Target path (string) & /hsv\\
+\hline
+\indattr{saturation} & Saturation component (0-1) (float) & 1\\
+\hline
+\indattr{skip} & Skip frames (uint32) & 0\\
+\hline
+\indattr{tau} & Leq duration, or 0 to use block size (float, s) & 0\\
+\hline
+\indattr{url} & Target URL (string) & {\tiny osc.udp://localhost:9999/}\\
+\hline
+\indattr{weight} & Level meter weight (f-weight) & Z\\
+\hline
+\end{tabularx}
+}
+\end{snugshade}
diff --git a/manual/documentation.tsc b/manual/documentation.tsc
index 92782148..d45884f2 100644
--- a/manual/documentation.tsc
+++ b/manual/documentation.tsc
@@ -50,6 +50,7 @@
             </layout>
           </spkcalib>
           <transportramp/>
+          <level2hsv/>
         </plugins>
       </sound>
       <sound type="cardioidmod"/>
diff --git a/plugins/Makefile b/plugins/Makefile
index a72567c0..7da51a65 100644
--- a/plugins/Makefile
+++ b/plugins/Makefile
@@ -29,7 +29,7 @@ AUDIOPLUGINS = delay dummy gate hannenv identity lipsync		\
   gainramp pulse pink dumplevels feedbackdelay bandpass filter		\
   level2osc const noise loopmachine pos2osc gain sndfileasync		\
   addchannel tubesim spkcalib sessiontime flanger timestamp		\
-  burglatticelpc fence transportramp allpass bandlevel2osc
+  burglatticelpc fence transportramp allpass bandlevel2osc level2hsv
 
 MASKPLUGINS = fig8 multibeam sampledgain
 
diff --git a/plugins/src/tascar_ap_level2hsv.cc b/plugins/src/tascar_ap_level2hsv.cc
new file mode 100644
index 00000000..a7aaa4bf
--- /dev/null
+++ b/plugins/src/tascar_ap_level2hsv.cc
@@ -0,0 +1,200 @@
+/*
+ * This file is part of the TASCAR software, see <http://tascar.org/>
+ *
+ * Copyright (c) 2024 Giso Grimm
+ */
+/*
+ * TASCAR is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, version 3 of the License.
+ *
+ * TASCAR is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHATABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License, version 3 for more details.
+ *
+ * You should have received a copy of the GNU General Public License,
+ * Version 3 along with TASCAR. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "audioplugin.h"
+#include "errorhandling.h"
+#include "levelmeter.h"
+#include <atomic>
+#include <chrono>
+#include <condition_variable>
+#include <lo/lo.h>
+#include <mutex>
+#include <thread>
+
+using namespace std::chrono_literals;
+
+enum levelmode_t { dbspl, rms, max };
+
+class level2hsv_t : public TASCAR::audioplugin_base_t {
+public:
+  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 configure();
+  void release();
+  ~level2hsv_t();
+
+private:
+  uint32_t skip = 0;
+  float tau = 0;
+  std::string url = "osc.udp://localhost:9999/";
+  std::string path = "/hsv";
+  float hue = 0;
+  float saturation = 1;
+  TASCAR::levelmeter::weight_t weight = TASCAR::levelmeter::Z;
+  std::vector<float> frange = {62.5f, 4000.0f};
+  std::vector<float> lrange = {40.0f, 90.0f};
+  // float value = 0;
+  // derived variables:
+  levelmode_t imode = dbspl;
+  lo_address lo_addr;
+  uint32_t skipcnt = 0;
+  lo_message msg;
+  std::thread thread;
+  std::atomic_bool run_thread = true;
+  void sendthread();
+  std::mutex mtx;
+  std::condition_variable cond;
+  std::atomic_bool has_data = false;
+  TASCAR::levelmeter_t* lmeter = NULL;
+  double currenttime = 0;
+  float* p_value = NULL;
+};
+
+level2hsv_t::level2hsv_t(const TASCAR::audioplugin_cfg_t& cfg)
+    : audioplugin_base_t(cfg)
+{
+  GET_ATTRIBUTE(skip, "", "Skip frames");
+  GET_ATTRIBUTE(url, "", "Target URL");
+  GET_ATTRIBUTE(path, "", "Target path");
+  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)");
+  std::string mode("dbspl");
+  GET_ATTRIBUTE(mode, "", "Level mode [dbspl|rms|max]");
+  if(mode == "dbspl")
+    imode = dbspl;
+  else if(mode == "rms")
+    imode = rms;
+  else if(mode == "max")
+    imode = max;
+  else
+    throw TASCAR::ErrMsg("Invalid level mode: " + mode);
+  GET_ATTRIBUTE_NOUNIT(weight, "Level meter weight");
+  GET_ATTRIBUTE(frange, "Hz", "Frequency range in bandpass mode");
+  if(weight == TASCAR::levelmeter::bandpass)
+    if(frange.size() != 2)
+      throw TASCAR::ErrMsg(
+          "Frequency range requires exactly two entries (min max)");
+  GET_ATTRIBUTE(lrange, "dB", "Level range");
+  if((lrange.size() != 2) || (lrange[0] == lrange[1]))
+    throw TASCAR::ErrMsg(
+        "Level range requires exactly two different entries (min max)");
+  lo_addr = lo_address_new_from_url(url.c_str());
+  msg = lo_message_new();
+  lo_message_add_float(msg, hue);
+  lo_message_add_float(msg, saturation);
+  lo_message_add_float(msg, 0);
+  lo_message_add_float(msg, 0.01);
+  auto oscmsgargv = lo_message_get_argv(msg);
+  p_value = &(oscmsgargv[2]->f);
+  thread = std::thread(&level2hsv_t::sendthread, this);
+}
+
+void level2hsv_t::sendthread()
+{
+  std::unique_lock<std::mutex> lk(mtx);
+  while(run_thread) {
+    cond.wait_for(lk, 100ms);
+    if(has_data) {
+      float l = 0.0f;
+      switch(imode) {
+      case dbspl:
+        l = lmeter->spldb();
+        break;
+      case rms:
+        l = lmeter->rms();
+        break;
+      case max:
+        l = lmeter->maxabsdb();
+        break;
+      }
+      l = std::min(1.0f,
+                   std::max(0.0f, (l - lrange[0]) / (lrange[1] - lrange[0])));
+      *p_value = l;
+      lo_send_message(lo_addr, path.c_str(), msg);
+      has_data = false;
+    }
+  }
+}
+
+void level2hsv_t::configure()
+{
+  audioplugin_base_t::configure();
+  float tau_ = tau;
+  if(tau_ == 0)
+    tau_ = t_fragment;
+  if(lmeter)
+    delete lmeter;
+  lmeter = NULL;
+  lmeter = new TASCAR::levelmeter_t(f_sample, tau_, weight);
+  if(weight == TASCAR::levelmeter::bandpass)
+    lmeter->bp.set_range(frange[0], frange[1]);
+}
+
+void level2hsv_t::release()
+{
+  audioplugin_base_t::release();
+}
+
+level2hsv_t::~level2hsv_t()
+{
+  run_thread = false;
+  thread.join();
+  lo_address_free(lo_addr);
+  if(lmeter)
+    delete lmeter;
+  lo_message_free(msg);
+}
+
+void level2hsv_t::ap_process(std::vector<TASCAR::wave_t>& chunk,
+                             const TASCAR::pos_t&, const TASCAR::zyx_euler_t&,
+                             const TASCAR::transport_t&)
+{
+  if(chunk.size() != n_channels)
+    throw TASCAR::ErrMsg(
+        "Programming error (invalid channel number, expected " +
+        TASCAR::to_string(n_channels) + ", got " +
+        std::to_string(chunk.size()) + ").");
+  if(chunk.size() == 0)
+    return;
+  lmeter->update(chunk[0]);
+  if(skipcnt) {
+    skipcnt--;
+  } else {
+    // data will be sent in extra thread:
+    if(mtx.try_lock()) {
+      has_data = true;
+      mtx.unlock();
+      cond.notify_one();
+    }
+    skipcnt = skip;
+  }
+}
+
+REGISTER_AUDIOPLUGIN(level2hsv_t);
+
+/*
+ * Local Variables:
+ * mode: c++
+ * c-basic-offset: 2
+ * indent-tabs-mode: nil
+ * compile-command: "make -C .."
+ * End:
+ */