Instruments: add better synth, pitch control

1 files changed, 26 insertions, 0 deletions

diff --git a/src/com/jsyn/unitgen/PitchToFrequency.java b/src/com/jsyn/unitgen/PitchToFrequency.java
new file mode 100644
index 0000000..9086749
--- /dev/null
+++ b/src/com/jsyn/unitgen/PitchToFrequency.java
@@ -0,0 +1,26 @@
+package com.jsyn.unitgen;
+
+import com.softsynth.math.AudioMath;
+
+public class PitchToFrequency extends PowerOfTwo {
+
+    public PitchToFrequency() {
+        input.setup(0.0, 60.0, 127.0);
+    }
+
+    /**
+     * Convert from MIDI pitch to an octave offset from Concert A.
+     */
+    @Override
+    public double adjustInput(double in) {
+        return (in - AudioMath.CONCERT_A_PITCH) * (1.0/12.0);
+    }
+
+    /**
+     * Convert scaler to a frequency relative to Concert A.
+     */
+    @Override
+    public double adjustOutput(double out) {
+        return out * AudioMath.getConcertAFrequency();
+    }
+}