Smooth the envelope with another envelope follower to nasty avoid wav…

…eform distortion.
cycfi · Aug 24, 2024 · 5c7483d · 5c7483d
1 parent 82a59ff
commit 5c7483d
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/q_lib/include/q/fx/signal_conditioner.hpp b/q_lib/include/q/fx/signal_conditioner.hpp
@@ -66,6 +66,7 @@ namespace cycfi::q
       highpass                _hp;
       dynamic_smoother        _sm;
       fast_envelope_follower  _env;
+      peak_envelope_follower  _env_lp;
       float                   _post_env;
       compressor              _comp;
       float                   _makeup_gain;
@@ -87,6 +88,7 @@ namespace cycfi::q
     , _hp{lowest_freq, sps}
     , _sm{lowest_freq + ((highest_freq - lowest_freq) / 2), sps}
     , _env{lowest_freq.period()*0.6, sps}
+    , _env_lp{lowest_freq.period(), sps}
     , _comp{conf.comp_threshold, conf.comp_slope}
     , _makeup_gain{conf.comp_gain}
     , _gate{
@@ -110,7 +112,7 @@ namespace cycfi::q
       s = _sm(s);
 
       // Signal envelope
-      auto env = _env(std::abs(s));
+      auto env = _env_lp(_env(std::abs(s)));
 
       // Noise gate
       auto gate = _gate(env);
@@ -137,7 +139,7 @@ namespace cycfi::q
 
    inline float signal_conditioner::pre_env() const
    {
-      return _env();
+      return _env_lp();
    }
 
    inline float signal_conditioner::signal_env() const

diff --git a/test/signal_conditioner.cpp b/test/signal_conditioner.cpp
@@ -75,6 +75,7 @@ int main()
    process("Hammer-Pull High E", high_e);
    process("Bend-Slide G", g);
    process("GStaccato", g);
+   process("GLines2", g);
 
    return 0;
 }