diff --git a/voltage.scd b/voltage.scd
index 29a018f..94a3f42 100644
--- a/voltage.scd
+++ b/voltage.scd
@@ -1,22 +1,36 @@
 (
-  SynthDef(\pitch, { | out, n, channel, stepsPerOctave = 12 |
-    n = n + (stepsPerOctave / 12);
-    n = (n + (n / stepsPerOctave) * (1 / (stepsPerOctave + 1)) / 10);
-    OffsetOut.ar(channel, DC.ar(n))
-  }).add
-);
 
-(
-  SynthDef(\voltage, { | out, channel, rate |
-    rate = rate * 5;
-    OffsetOut.ar(channel, DC.ar(rate));
-  }).add
-);
+	(
+		SynthDef (\pitch, { | out, n, channel, stepsPerOctave = 12, rate = 1, delta, begin, end, portamento = 0, accelerate = 0 |
+			var slew, env, phase;
+			n = n + (stepsPerOctave / 12);
+			n = (n + (n / stepsPerOctave) * (1 / (stepsPerOctave + 1)) / 10);
+			slew = (portamento * accelerate);
+			slew = (slew + (slew / stepsPerOctave) * (1 / (stepsPerOctave + 1)) / 10);
+			env = Env ([n, n + slew], [delta / rate]);
+			phase = Line.ar (begin, end, delta / rate);
+			OffsetOut.ar (channel, IEnvGen.ar (env, phase));
+		}).add
+	);
 
-(
-  SynthDef(\adsr, { | out, channel, attack = 0.1, decay = 0.5, sustain = 0.5, release = 0.5, begin, end |
-    var env = Env.adsr(attack, decay, sustain, release);
-    var phase = Line.ar(begin, end, sustain);
-    OffsetOut.ar(channel, IEnvGen.ar(env, phase));
-  }).add
-);
+	(
+		SynthDef (\voltage, { | out, channel, n, rate = 1, delta, begin, end, portamento = 0, accelerate = 0 |
+			var slew, env, phase;
+			n = n * 5;
+			slew = (portamento * accelerate);
+			env = Env ([n, n + slew], [delta / rate]);
+			phase = Line.ar (begin, end, delta / rate);
+			OffsetOut.ar (channel, IEnvGen.ar (env, phase));
+		}).add
+	);
+
+	(
+		SynthDef (\adsr, { | out, channel, attack = 0.1, decay = 0.5, sustain = 0.5, release = 0.5, begin, end |
+		  var env, phase;
+			env = Env.adsr (attack, decay, sustain, release);
+			phase = Line.ar (begin, end, sustain);
+			OffsetOut.ar (channel, IEnvGen.ar (env, phase));
+		}).add
+	);
+
+)