- wavetable using Waldorf Microwave "wave.bin" (16bit) is broken

- wavetable uses "wave2.bin" (8bit) Waveforms
-

extras/waves.readme

@@ -0,0 +1,3 @@
+Waldorf MicroWave Wellenformen und WaveTables hinzugef�gt. WaveTable-Scan �ber PWM. 
+wave.bin: Original MicroWave Wellenformen m�ssen als Datei ("waves.bin", 16bit, Big-Endian) im Plugin-Verzeichnis vorliegen, damit Feature freigeschaltet wird.
+wave2.bin: Original PPG EVU Wellenformen 8bit

src/synth/wavetable.c

@@ -4,6 +4,7 @@
 #include <math.h>
 
 #include "synth_defs.h"
+#include "synth_types.h"
 #include "vector_utils.h"
 #include "wavetable.h"
 
@@ -60,7 +61,8 @@ const wt_descr_t _g_wt_descr[WT_NUM_WAVETABLES] =
 void WT_ModInit(wt_common_t *pCom)
 {
 	UINT32 i, j, k, offset, last_pos, distance;
-	INT16 sample, wave[WT_WAVE_SIZE];
+	INT16 sample;
+	char wave[WT_WAVE_SIZE];
 	wt_descr_t const *pDesc;
 	synth_float_t kmix;
 	synth_float_t x, dx, wave_tri[WT_WAVE_SIZE], wave_sqr[WT_WAVE_SIZE], wave_saw[WT_WAVE_SIZE];
@@ -80,32 +82,16 @@ void WT_ModInit(wt_common_t *pCom)
 
 		for (j=0; j < 64; j++)
 		{
-			sample = ((INT16)pCom->wave_rawdata[128*i + 2*j + 0] << 8) + pCom->wave_rawdata[128*i + 2*j + 1];
+			sample = (INT16)(pCom->wave_rawdata[64*i + j]);
-#if 0
+			wave[j] = sample - 127;
-			if (sample & 0x8000)
+			sample = (INT16)(pCom->wave_rawdata[64*i + 63 - j]);
-			{
+			wave[j + 64] = -(sample - 127);
-				sample = 0xFFFF - sample + 1;
-			}
-			wave[j] = sample;
-#endif
 		}
 
-		// Possible assembly 1
-		wave[64] = 0;
-		for (j=0; j < 63; j++)
-		{
-			wave[65+j] = -wave[63-j];
-		}
-
-		// Possible assembly 2
-//		for (j=0; j < 64; j++)
-//		{
-//			wave[64+j] = -wave[63-j];
-//		}
 
 		for (j=0; j < WT_WAVE_SIZE; j++)
 		{
-			pCom->waves[offset+i][j] = (synth_float_t)wave[j]/8192;
+			pCom->waves[offset+i][j] = (synth_float_t)wave[j]/256;
 		}
 
 #ifdef WAVE_EXPORT_FILE
@@ -117,7 +103,7 @@ void WT_ModInit(wt_common_t *pCom)
 			pFile = fopen(filename, "wb");
 			if (pFile)
 			{
-				fwrite(wave, 2, WT_WAVE_SIZE, pFile);
+				fwrite(wave, 1, WT_WAVE_SIZE, pFile);
 				fclose(pFile);
 			}
 		}
@@ -129,7 +115,7 @@ void WT_ModInit(wt_common_t *pCom)
 			
 			for (i=0; i < 20; i++)
 			{
-				fwrite(wave, 2, WT_WAVE_SIZE, pFileAll);
+				fwrite(wave, 1, WT_WAVE_SIZE, pFileAll);
 			}
 		}
 	}

src/synth/wavetable.h

@@ -10,6 +10,9 @@
 #define WT_NUM_WAVETABLES		40
 #define WT_WAVETABLE_SIZE		64
 
+// see
+// https://jacajack.github.io/music/2019/12/10/PPG-EPROM.html
+
 // --------------------------------------------------------------
 // Types
 // --------------------------------------------------------------