diff --git a/src/dsp/mod.rs b/src/dsp/mod.rs
index ca9174b..6391a91 100644
--- a/src/dsp/mod.rs
+++ b/src/dsp/mod.rs
@@ -347,6 +347,9 @@ define_exp!{n_declick d_declick 0.0, 50.0}
 
 define_exp!{n_env d_env 0.0, 1000.0}
 
+// Special linear gain factor for the Out node, to be able
+// to reach more exact "1.0".
+define_lin!{n_ogin d_ogin 0.0, 2.0}
 
 // A note about the input-indicies:
 //
@@ -412,7 +415,7 @@ macro_rules! node_list {
             out => Out UIType::Generic UICategory::IOUtil
                (0  ch1   n_id      d_id  r_id   f_def  stp_d -1.0, 1.0, 0.0)
                (1  ch2   n_id      d_id  r_id   f_def  stp_d -1.0, 1.0, 0.0)
-               (2  gain  n_gain    d_gain r_id  f_def  stp_d  0.0, 1.0, 1.0)
+               (2  gain  n_ogin    d_ogin r_id  f_def  stp_d  0.0, 1.0, 1.0)
              // node_param_idx
              // | atom_idx          format fun
              // | | name constructor|           min max
@@ -426,12 +429,14 @@ macro_rules! node_list {
                [0 sig],
             ad   => Ad   UIType::Generic UICategory::CV
                (0  inp   n_id      d_id  r_id   f_def stp_d -1.0, 1.0, 1.0)
-               (1  atk   n_env     d_env r_ems  f_ms  stp_m  0.0, 1.0, 3.0)
-               (2  dcy   n_env     d_env r_ems  f_ms  stp_m  0.0, 1.0, 10.0)
-               (3  ashp  n_id      d_id  r_id   f_def stp_d  0.0, 1.0, 0.5)
-               (4  dshp  n_id      d_id  r_id   f_def stp_d  0.0, 1.0, 0.5)
-               {5 0 mult setting(0) fa_ad_mult  0  2}
-               [0 sig],
+               (1  trig  n_id      d_id  r_id   f_def stp_d -1.0, 1.0, 0.0)
+               (2  atk   n_env     d_env r_ems  f_ms  stp_m  0.0, 1.0, 3.0)
+               (3  dcy   n_env     d_env r_ems  f_ms  stp_m  0.0, 1.0, 10.0)
+               (4  ashp  n_id      d_id  r_id   f_def stp_d  0.0, 1.0, 0.5)
+               (5  dshp  n_id      d_id  r_id   f_def stp_d  0.0, 1.0, 0.5)
+               {6 0 mult setting(0) fa_ad_mult  0  2}
+               [0 sig]
+               [1 eoet],
             test => Test UIType::Generic UICategory::IOUtil
                (0 f     n_id      d_id   r_id   f_def stp_d 0.0, 1.0, 0.5)
                {1 0 s    setting(0) fa_test_s 0  10},
diff --git a/src/dsp/node_ad.rs b/src/dsp/node_ad.rs
index ffd26e0..4991a2a 100644
--- a/src/dsp/node_ad.rs
+++ b/src/dsp/node_ad.rs
@@ -4,6 +4,7 @@
 
 use crate::nodes::{NodeAudioContext, NodeExecContext};
 use crate::dsp::{NodeId, SAtom, ProcBuf, DspNode, LedPhaseVals};
+use super::helpers::{Trigger, TrigSignal, sqrt4_to_pow4};
 
 #[macro_export]
 macro_rules! fa_ad_mult { ($formatter: expr, $v: expr, $denorm_v: expr) => { {
@@ -22,25 +23,33 @@ const AD_STAGES : i8 = 2;
 /// A simple amplifier
 #[derive(Debug, Clone)]
 pub struct Ad {
-    srate:      f64,
-    phase:      f64,
-    last_value: f32,
-    stage:      i8,
+    inc:            f64,
+    stage:          u8,
+    samples_ms:     f64,
+    value:          f64,
+    last_time:      f32,
+    trig:           Trigger,
+    trig_sig:       TrigSignal,
 }
 
 impl Ad {
     pub fn new(_nid: &NodeId) -> Self {
         Self {
-            srate:      44100.0,
-            phase:      0.0,
-            last_value: 0.0,
-            stage:      -1,
+            inc:        0.0,
+            stage:      0,
+            samples_ms: 44.1,
+            value:      0.0,
+            last_time: -1.0,
+            trig:       Trigger::new(),
+            trig_sig:   TrigSignal::new(),
         }
     }
     pub const inp : &'static str =
         "Ad inp\nSignal input. If you don't connect this, and set this to 1.0 \
         this will act as envelope signal generator. But you can also just \
         route a signal directly through this of course.\nRange: (-1..1)\n";
+    pub const trig : &'static str =
+        "Ad trig\nTrigger input that starts the attack phase.\nRange: (0..1)\n";
     pub const atk : &'static str =
         "Ad atk\nAttack time of the envelope. You can extend the maximum \
         range of this with the 'mult' setting.\nRange: (0..1)\n";
@@ -63,102 +72,49 @@ impl Ad {
         you will receive an attenuated signal here. If you set 'inp' to a \
         fixed value (for instance 1.0), this will output an envelope signal \
         in the range 0.0 to 'inp' (1.0).\nRange: (-1..1)\n";
+    pub const eoet : &'static str =
+        "Ad eoet\nEnd of envelope trigger. This output sends a trigger once \
+        the end of the decay stage has been reached.\nRange: (0..1)";
     pub const DESC : &'static str =
 r#"Attack-Decay Envelope
 
-This is a simple envelope offering an attack time and decay time with shape parameter.
+This is a simple envelope offering an attack time and decay time with a shape parameter.
+You can use it as envelope generator to modulate other inputs or process a signal with it directly.
 "#;
     pub const HELP : &'static str =
 r#"Ad - Attack-Decay Envelope
 
+This simple two stage envelope with attack and decay offers shape parameters
+for each stage. The attack and decay times can be extended using the 'mult'
+setting.
+
+The 'inp' can either be used to process a signal, or set the target output
+value of the envelope. In the latter case this node is just a simple
+envelope generator, with which you can generate control signals to modulate
+other inputs.
+
+With the 'eoet' output you can either trigger other envelopes or via
+'FbWr'/'FbRd' retrigger the envelope.
 "#;
 
 }
 
-/*
-    struct {
-        srate_per_ms: f64,
-        value     : f64 = 0.0;
-        inc       : f64 = 0.0;
-        stage     = 0;
-        last_time = 0.0;
-        target    : f64 = 1.0;
-        shape     = 0.5;
-    }
-    set_sample_rate(srate) { self.srate_per_ms = srate / 1000.0 }
-
-    // block start:
-    let mut shape_src =
-        match stage {
-            2 => dcy_shape,
-            _ => atk_shape,
-        };
-    let mut inc_time_src =
-        match stage {
-            2 => dcy,
-            _ => atk,
-        };
-    let mut mult : f64 =
-        if mult == 1 { 10.0 } else if mult == 2 {100.0 } else { 1.0};
-
-    // each frame:
-    if stage == 0 {
-        if trigger(trig_in) {
-            value = 0.0;
-
-            // transition to stage 1 (attack):
-            stage        = 1;
-            target       = 1.0;
-            shape_src    = atk_shape;
-            inc_time_src = atk;
-            last_time    = -1.0;
-        }
-    }
-
-    let cur_time = denorm(inc_time_src);
-    if last_time != cur_time {
-        inc =
-            (target - value)
-            / ((cur_time as f64) * mult * srate_per_ms);
-    }
-
-    value += inc;
-    shape  = read(frame, shape_src).clamp(0.0, 1.0);
-
-    match stage {
-         1 => {
-            if value >= target {
-                // transition to stage 2 (decay):
-                stage           = 2;
-                target          = 0.0;
-                shape_src       = dcy_shape;
-                inc_time_src    = dcy;
-                last_time       = -1.0;
-            }
-         },
-         2 => {
-            if value <= target {
-                stage = 0;
-                eov_trigger.trigger();
-            }
-         },
-         _ => {},
-    }
-
-    let in_val = inp.read(frame);
-    out.write(
-        frame,
-        in_val
-        * sqrt4_to_pow4(
-            value.clamp(0.0, 1.0) as f32, shape));
-    trig.write(frame, eov_trigger.next());
-*/
-
 impl DspNode for Ad {
     fn outputs() -> usize { 1 }
 
-    fn set_sample_rate(&mut self, _srate: f32) { }
-    fn reset(&mut self) { }
+    fn set_sample_rate(&mut self, srate: f32) {
+        self.samples_ms = srate as f64 / 1000.0;
+        self.trig_sig.set_sample_rate(srate);
+    }
+
+    fn reset(&mut self) {
+        self.stage      = 0;
+        self.value      = 0.0;
+        self.inc        = 0.0;
+        self.last_time  = -1.0;
+        self.trig_sig.reset();
+        self.trig.reset();
+    }
 
     #[inline]
     fn process<T: NodeAudioContext>(
@@ -168,15 +124,98 @@ impl DspNode for Ad {
     {
         use crate::dsp::{out, inp, denorm, denorm_v, inp_dir, at};
 
-        let out = out::Ad::sig(outputs);
+        let inp       = inp::Ad::inp(inputs);
+        let trig      = inp::Ad::trig(inputs);
+        let atk       = inp::Ad::atk(inputs);
+        let dcy       = inp::Ad::dcy(inputs);
+        let atk_shape = inp::Ad::ashp(inputs);
+        let dcy_shape = inp::Ad::dshp(inputs);
+        let mult      = at::Ad::mult(atoms);
 
-        let last_frame = ctx.nframes() - 1;
+        // block start:
+        let (mut shape_src, mut inc_time_src, mut target) =
+            match self.stage {
+                1 => (atk_shape, atk, 1.0),
+                2 => (dcy_shape, dcy, 0.0),
+                _ => (atk_shape, atk, 0.0),
+            };
+        let mut mult : f64 =
+            match mult.i() {
+                1 => 10.0,
+                2 => 100.0,
+                _ => 1.0,
+            };
 
         for frame in 0..ctx.nframes() {
-            out.write(frame, 0.0);
+            // each frame:
+            let is_triggered =
+                self.trig.check_trigger(denorm::Ad::trig(trig, frame));
+
+            if self.stage == 0 && is_triggered {
+                // transition to stage 1 (attack):
+                self.stage     = 1;
+                self.last_time = -1.0;
+                target         = 1.0;
+                shape_src      = atk_shape;
+                inc_time_src   = atk;
+            }
+
+            let cur_time = denorm::Ad::atk(inc_time_src, frame);
+            if self.last_time != cur_time {
+                self.inc =
+                    if cur_time <= 0.0001 {
+                        target - self.value
+                    } else {
+                        (target - self.value)
+                        / ((cur_time as f64) * mult * self.samples_ms)
+                    };
+                self.last_time = cur_time;
+            }
+
+            self.value += self.inc;
+            let shape =
+                denorm::Ad::ashp(shape_src, frame)
+                .clamp(0.0, 1.0);
+
+            match self.stage {
+                 1 => {
+                    if self.value >= target {
+                        self.stage     = 2;
+                        self.last_time = -1.0;
+                        self.value     = target;
+                        target         = 0.0;
+                        shape_src      = dcy_shape;
+                        inc_time_src   = dcy;
+                    }
+                 },
+                 2 => {
+                    if self.value <= target {
+                        self.stage     = 0;
+                        self.last_time = -1.0;
+                        self.value     = target;
+                        target         = 0.0;
+                        self.trig_sig.trigger();
+                    }
+                 },
+                 _ => {},
+            }
+
+            let in_val = denorm::Ad::inp(inp, frame);
+            let out = out::Ad::sig(outputs);
+            //d// println!("VAL in={}, val={} shp: {}=>{}", in_val, self.value, shape,
+            //d//     sqrt4_to_pow4(1.0, shape));
+            out.write(
+                frame,
+                in_val
+                * sqrt4_to_pow4(
+                    self.value.clamp(0.0, 1.0) as f32,
+                    shape));
+
+            let eoet = out::Ad::eoet(outputs);
+            eoet.write(frame, self.trig_sig.next());
         }
 
-        ctx_vals[0].set(0.0);
+        ctx_vals[0].set(self.value as f32);
 //        ctx_vals[1].set(self.phase / self. + self.stage * );
     }
 }
diff --git a/src/dsp/node_out.rs b/src/dsp/node_out.rs
index 4870b8c..18625bc 100644
--- a/src/dsp/node_out.rs
+++ b/src/dsp/node_out.rs
@@ -34,7 +34,9 @@ impl Out {
     pub const mono : &'static str =
         "Out mono\nIf set to 'Mono', ch1 will be sent to both output channels.\n(UI only)";
     pub const gain : &'static str =
-        "Out gain\nThe main gain of the synthesizer output, applied to all channels.\nRange: (0..1)";
+        "Out gain\nThe main gain of the synthesizer output, applied to all channels. \
+        Please note that this is a linear control, to prevent inaccuracies for 1.0. \
+        \nRange: (0..1)";
     pub const ch1 : &'static str =
         "Out ch1\nAudio channel 1 (left)\nRange: (-1..1)";
     pub const ch2 : &'static str =
diff --git a/src/matrix_repr.rs b/src/matrix_repr.rs
index 011ea5a..9616e4b 100644
--- a/src/matrix_repr.rs
+++ b/src/matrix_repr.rs
@@ -469,7 +469,7 @@ mod tests {
         let s = mr.serialize();
 
         assert_eq!(s,
-          "{\"VERSION\":1,\"atoms\":[[\"out\",0,\"mono\",[\"i\",0]]],\"cells\":[[\"sin\",2,0,0,[-1,-1,-1],[-1,0,-1]],[\"out\",0,1,0,[-1,0,-1],[-1,-1,0]]],\"params\":[[\"out\",0,\"ch1\",0.0],[\"out\",0,\"ch2\",0.0],[\"sin\",0,\"det\",0.0],[\"sin\",1,\"det\",0.0],[\"sin\",2,\"det\",0.0],[\"sin\",0,\"freq\",0.0],[\"sin\",1,\"freq\",0.0],[\"sin\",2,\"freq\",-0.10000000149011612],[\"out\",0,\"gain\",0.7071067690849304]],\"patterns\":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null]}");
+          "{\"VERSION\":1,\"atoms\":[[\"out\",0,\"mono\",[\"i\",0]]],\"cells\":[[\"sin\",2,0,0,[-1,-1,-1],[-1,0,-1]],[\"out\",0,1,0,[-1,0,-1],[-1,-1,0]]],\"params\":[[\"out\",0,\"ch1\",0.0],[\"out\",0,\"ch2\",0.0],[\"sin\",0,\"det\",0.0],[\"sin\",1,\"det\",0.0],[\"sin\",2,\"det\",0.0],[\"sin\",0,\"freq\",0.0],[\"sin\",1,\"freq\",0.0],[\"sin\",2,\"freq\",-0.10000000149011612],[\"out\",0,\"gain\",0.5]],\"patterns\":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null]}");
 
         let mut mr2 = MatrixRepr::deserialize(&s).unwrap();
 
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index e673552..54c110e 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -79,6 +79,35 @@ assertion failed: `(left[{}] == right[{}])`
     }
 }
 
+#[macro_export]
+macro_rules! assert_decimated_slope_feq {
+    ($vec:expr, $decimate:expr, $cmp_vec:expr) => {
+        let cmp_vec = $cmp_vec;
+        let mut res : Vec<f32> = vec![];
+        let mut prev = 0.0;
+        for s in $vec.iter() {
+            let delta = *s - prev;
+            res.push(delta);
+            prev = *s;
+        }
+
+        let res : Vec<f32> = res.iter().step_by($decimate).copied().collect();
+
+        for (i, (s, scmp)) in res.iter().zip(cmp_vec.iter()).enumerate() {
+            if (s - scmp).abs() > 0.0001 {
+                panic!(r#"
+table_left: {:?}
+
+table_right: {:?}
+
+assertion failed: `(left[{}] == right[{}])`
+      left: `{:?}`,
+     right: `{:?}`"#, &res[i..], &(cmp_vec[i..]), i, i, s, scmp)
+            }
+        }
+    }
+}
+
 #[macro_export]
 macro_rules! assert_rmsmima {
     ($rms:expr, $b:expr) => {
diff --git a/tests/node_ad.rs b/tests/node_ad.rs
new file mode 100644
index 0000000..b48821c
--- /dev/null
+++ b/tests/node_ad.rs
@@ -0,0 +1,41 @@
+mod common;
+use common::*;
+
+#[test]
+fn check_node_ad_1() {
+    let (node_conf, mut node_exec) = new_node_engine();
+    let mut matrix = Matrix::new(node_conf, 3, 3);
+
+    let ad   = NodeId::Ad(0);
+    let out  = NodeId::Out(0);
+    matrix.place(0, 0, Cell::empty(ad)
+                       .out(None, None, ad.out("sig")));
+    matrix.place(0, 1, Cell::empty(out)
+                       .input(out.inp("ch1"), None, None));
+    matrix.sync().unwrap();
+
+    let trig_p = ad.inp_param("trig").unwrap();
+
+    matrix.set_param(trig_p, SAtom::param(1.0));
+    let res = run_for_ms(&mut node_exec, 25.0);
+    assert_decimated_slope_feq!(res.0, 50, vec![
+        0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
+        // 44.1 per ms, attack is default 3.0ms (roughly 3 * 50 samples):
+        0.007558584, 0.007558584, 0.007558584,
+        // 44.1 per ms, decay is default 10.0ms (=> roughly 9 * 50 samples):
+        -0.002267599, -0.0022675395, -0.002267599, -0.0022675395,
+        -0.0022675693, -0.0022675693, -0.0022675842, -0.0022675693,
+        -0.0022675726,
+        0.0, 0.0, 0.0, 0.0
+    ]);
+
+    matrix.set_param(trig_p, SAtom::param(0.0));
+    run_for_ms(&mut node_exec, 10.0);
+    matrix.set_param(trig_p, SAtom::param(1.0));
+    let res = run_for_ms(&mut node_exec, 25.0);
+    //d// println!("RES: {:?}", res);
+    let start = res.0[330];
+    assert_float_eq!(start, 0.0075585);
+    let peak = res.0[330 + ((44.1_f64 * 3.0).floor() as usize)];
+    assert_float_eq!(peak, 1.0);
+}