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diff --git a/audio/softsynth/mt32/Tables.h b/audio/softsynth/mt32/Tables.h
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+/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
+ * Copyright (C) 2011 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation, either version 2.1 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MT32EMU_TABLES_H
+#define MT32EMU_TABLES_H
+
+namespace MT32Emu {
+
+const int MIDDLEC = 60;
+
+class Synth;
+
+class Tables {
+	bool initialised;
+
+public:
+	// Constant LUTs
+
+	// CONFIRMED: This is used to convert several parameters to amp-modifying values in the TVA envelope:
+	// - PatchTemp.outputLevel
+	// - RhythmTemp.outlevel
+	// - PartialParam.tva.level
+	// - expression
+	// It's used to determine how much to subtract from the amp envelope's target value
+	Bit8u levelToAmpSubtraction[101];
+
+	// CONFIRMED: ...
+	Bit8u envLogarithmicTime[256];
+
+	// CONFIRMED: ...
+	Bit8u masterVolToAmpSubtraction[101];
+
+	// CONFIRMED:
+	Bit8u pulseWidth100To255[101];
+
+	float pulseLenFactor[128];
+	float pitchToFreq[65536];
+	float cutoffToCosineLen[1024];
+	float cutoffToFilterAmp[1024];
+	float resAmpMax[32];
+	float resAmpFadeFactor[8];
+	float sinf10[5120];
+
+	Tables();
+	void init();
+};
+
+}
+
+#endif