diff --git a/Makefile.am b/Makefile.am
index 3db91104..8e6e12ae 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -159,6 +159,7 @@ src_libespeak_ng_la_SOURCES = \
 	src/libespeak-ng/phoneme.c \
 	src/libespeak-ng/phonemelist.c \
 	src/libespeak-ng/setlengths.c \
+	src/libespeak-ng/soundicon.c \
 	src/libespeak-ng/spect.c \
 	src/libespeak-ng/speech.c \
 	src/libespeak-ng/ssml.c \
diff --git a/android/jni/Android.mk b/android/jni/Android.mk
index 8a6a2332..8c6a8ca3 100644
--- a/android/jni/Android.mk
+++ b/android/jni/Android.mk
@@ -28,6 +28,7 @@ ESPEAK_SOURCES := \
   src/libespeak-ng/phonemelist.c \
   src/libespeak-ng/readclause.c \
   src/libespeak-ng/setlengths.c \
+  src/libespeak-ng/soundicon.c \
   src/libespeak-ng/spect.c \
   src/libespeak-ng/speech.c \
   src/libespeak-ng/ssml.c \
diff --git a/src/libespeak-ng/readclause.c b/src/libespeak-ng/readclause.c
index ff4bd945..2640f39d 100644
--- a/src/libespeak-ng/readclause.c
+++ b/src/libespeak-ng/readclause.c
@@ -41,10 +41,10 @@
 #include "dictionary.h"           // for LookupDictList, DecodePhonemes, Set...
 #include "error.h"                // for create_file_error_context
 #include "phoneme.h"              // for phonSWITCH
+#include "soundicon.h"               // for LookupSoundIcon
 #include "speech.h"               // for GetFileLength, LookupMnem, PATHSEP
 #include "ssml.h"                 // for SSML_STACK, ProcessSsmlTag, N_PARAM...
 #include "synthdata.h"            // for SelectPhonemeTable
-#include "synthesize.h"           // for SOUND_ICON, soundicon_tab, samplerate
 #include "translate.h"            // for Translator, utf8_out, CLAUSE_OPTION...
 #include "voice.h"                // for voice, voice_t, current_voice_selected
 
@@ -296,143 +296,6 @@ int Read4Bytes(FILE *f)
 	return acc;
 }
 
-static espeak_ng_STATUS LoadSoundFile(const char *fname, int index, espeak_ng_ERROR_CONTEXT *context)
-{
-	FILE *f;
-	char *p;
-	int *ip;
-	int length;
-	char fname_temp[100];
-	char fname2[sizeof(path_home)+13+40];
-
-	if (fname == NULL) {
-		// filename is already in the table
-		fname = soundicon_tab[index].filename;
-	}
-
-	if (fname == NULL)
-		return EINVAL;
-
-	if (fname[0] != '/') {
-		// a relative path, look in espeak-ng-data/soundicons
-		sprintf(fname2, "%s%csoundicons%c%s", path_home, PATHSEP, PATHSEP, fname);
-		fname = fname2;
-	}
-
-	f = NULL;
-	if ((f = fopen(fname, "rb")) != NULL) {
-		int ix;
-		int fd_temp;
-		int header[3];
-		char command[sizeof(fname2)+sizeof(fname2)+40];
-
-		if (fseek(f, 20, SEEK_SET) == -1) {
-			int error = errno;
-			fclose(f);
-			return create_file_error_context(context, error, fname);
-		}
-
-		for (ix = 0; ix < 3; ix++)
-			header[ix] = Read4Bytes(f);
-
-		// if the sound file is not mono, 16 bit signed, at the correct sample rate, then convert it
-		if ((header[0] != 0x10001) || (header[1] != samplerate) || (header[2] != samplerate*2)) {
-			fclose(f);
-			f = NULL;
-
-#ifdef HAVE_MKSTEMP
-			strcpy(fname_temp, "/tmp/espeakXXXXXX");
-			if ((fd_temp = mkstemp(fname_temp)) >= 0)
-				close(fd_temp);
-#else
-			strcpy(fname_temp, tmpnam(NULL));
-#endif
-
-			sprintf(command, "sox \"%s\" -r %d -c1 -b 16 -t wav %s\n", fname, samplerate, fname_temp);
-			if (system(command) == 0)
-				fname = fname_temp;
-		}
-	}
-
-	if (f == NULL) {
-		f = fopen(fname, "rb");
-		if (f == NULL)
-			return create_file_error_context(context, errno, fname);
-	}
-
-	length = GetFileLength(fname);
-	if (length < 0) { // length == -errno
-		fclose(f);
-		return create_file_error_context(context, -length, fname);
-	}
-	if (fseek(f, 0, SEEK_SET) == -1) {
-		int error = errno;
-		fclose(f);
-		return create_file_error_context(context, error, fname);
-	}
-	if ((p = (char *)realloc(soundicon_tab[index].data, length)) == NULL) {
-		fclose(f);
-		return ENOMEM;
-	}
-	if (fread(p, 1, length, f) != length) {
-		int error = errno;
-		fclose(f);
-		remove(fname_temp);
-		free(p);
-		return create_file_error_context(context, error, fname);
-	}
-	fclose(f);
-	remove(fname_temp);
-
-	ip = (int *)(&p[40]);
-	soundicon_tab[index].length = (*ip) / 2; // length in samples
-	soundicon_tab[index].data = p;
-	return ENS_OK;
-}
-
-static int LookupSoundicon(int c)
-{
-	// Find the sound icon number for a punctuation character
-	int ix;
-
-	for (ix = N_SOUNDICON_SLOTS; ix < n_soundicon_tab; ix++) {
-		if (soundicon_tab[ix].name == c) {
-			if (soundicon_tab[ix].length == 0) {
-				if (LoadSoundFile(NULL, ix, NULL) != ENS_OK)
-					return -1; // sound file is not available
-			}
-			return ix;
-		}
-	}
-	return -1;
-}
-
-int LoadSoundFile2(const char *fname)
-{
-	// Load a sound file into one of the reserved slots in the sound icon table
-	// (if it'snot already loaded)
-
-	int ix;
-	static int slot = -1;
-
-	for (ix = 0; ix < n_soundicon_tab; ix++) {
-		if (((soundicon_tab[ix].filename != NULL) && strcmp(fname, soundicon_tab[ix].filename) == 0))
-			return ix; // already loaded
-	}
-
-	// load the file into the next slot
-	slot++;
-	if (slot >= N_SOUNDICON_SLOTS)
-		slot = 0;
-
-	if (LoadSoundFile(fname, slot, NULL) != ENS_OK)
-		return -1;
-
-	soundicon_tab[slot].filename = (char *)realloc(soundicon_tab[ix].filename, strlen(fname)+1);
-	strcpy(soundicon_tab[slot].filename, fname);
-	return slot;
-}
-
 static int AnnouncePunctuation(Translator *tr, int c1, int *c2_ptr, char *output, int *bufix, int end_clause)
 {
 	// announce punctuation names
diff --git a/src/libespeak-ng/readclause.h b/src/libespeak-ng/readclause.h
index 4eba7756..bdcf15f9 100644
--- a/src/libespeak-ng/readclause.h
+++ b/src/libespeak-ng/readclause.h
@@ -42,7 +42,6 @@ int towlower2(unsigned int c, Translator *translator); // Supports Turkish I
 int Eof(void);
 const char *WordToString2(unsigned int word);
 int Read4Bytes(FILE *f);
-int LoadSoundFile2(const char *fname);
 int AddNameData(const char *name,
                 int wide);
 int ReadClause(Translator *tr,
diff --git a/src/libespeak-ng/soundicon.c b/src/libespeak-ng/soundicon.c
new file mode 100644
index 00000000..fbf61a62
--- /dev/null
+++ b/src/libespeak-ng/soundicon.c
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2005 to 2015 by Jonathan Duddington
+ * email: jonsd@users.sourceforge.net
+ * Copyright (C) 2015-2017 Reece H. Dunn
+ * Copyright (C) 2021 Juho Hiltunen
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see: <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <locale.h>
+#include <math.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <espeak-ng/espeak_ng.h>
+#include <espeak-ng/speak_lib.h>
+#include <espeak-ng/encoding.h>
+#include <ucd/ucd.h>
+
+#include "soundicon.h" 
+#include "error.h"                // for create_file_error_context
+#include "readclause.h"               // for Read4Bytes
+#include "speech.h"                   // for path_home, GetFileLength, PATHSEP
+#include "synthesize.h"                   // for samplerate
+
+int n_soundicon_tab = N_SOUNDICON_SLOTS;
+SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];
+
+
+static espeak_ng_STATUS LoadSoundFile(const char *fname, int index, espeak_ng_ERROR_CONTEXT *context)
+{
+	FILE *f;
+	char *p;
+	int *ip;
+	int length;
+	char fname_temp[100];
+	char fname2[sizeof(path_home)+13+40];
+
+	if (fname == NULL) {
+		// filename is already in the table
+		fname = soundicon_tab[index].filename;
+	}
+
+	if (fname == NULL)
+		return EINVAL;
+
+	if (fname[0] != '/') {
+		// a relative path, look in espeak-ng-data/soundicons
+		sprintf(fname2, "%s%csoundicons%c%s", path_home, PATHSEP, PATHSEP, fname);
+		fname = fname2;
+	}
+
+	f = NULL;
+	if ((f = fopen(fname, "rb")) != NULL) {
+		int ix;
+		int fd_temp;
+		int header[3];
+		char command[sizeof(fname2)+sizeof(fname2)+40];
+
+		if (fseek(f, 20, SEEK_SET) == -1) {
+			int error = errno;
+			fclose(f);
+			return create_file_error_context(context, error, fname);
+		}
+
+		for (ix = 0; ix < 3; ix++)
+			header[ix] = Read4Bytes(f);
+
+		// if the sound file is not mono, 16 bit signed, at the correct sample rate, then convert it
+		if ((header[0] != 0x10001) || (header[1] != samplerate) || (header[2] != samplerate*2)) {
+			fclose(f);
+			f = NULL;
+
+#ifdef HAVE_MKSTEMP
+			strcpy(fname_temp, "/tmp/espeakXXXXXX");
+			if ((fd_temp = mkstemp(fname_temp)) >= 0)
+				close(fd_temp);
+#else
+			strcpy(fname_temp, tmpnam(NULL));
+#endif
+
+			sprintf(command, "sox \"%s\" -r %d -c1 -b 16 -t wav %s\n", fname, samplerate, fname_temp);
+			if (system(command) == 0)
+				fname = fname_temp;
+		}
+	}
+
+	if (f == NULL) {
+		f = fopen(fname, "rb");
+		if (f == NULL)
+			return create_file_error_context(context, errno, fname);
+	}
+
+	length = GetFileLength(fname);
+	if (length < 0) { // length == -errno
+		fclose(f);
+		return create_file_error_context(context, -length, fname);
+	}
+	if (fseek(f, 0, SEEK_SET) == -1) {
+		int error = errno;
+		fclose(f);
+		return create_file_error_context(context, error, fname);
+	}
+	if ((p = (char *)realloc(soundicon_tab[index].data, length)) == NULL) {
+		fclose(f);
+		return ENOMEM;
+	}
+	if (fread(p, 1, length, f) != length) {
+		int error = errno;
+		fclose(f);
+		remove(fname_temp);
+		free(p);
+		return create_file_error_context(context, error, fname);
+	}
+	fclose(f);
+	remove(fname_temp);
+
+	ip = (int *)(&p[40]);
+	soundicon_tab[index].length = (*ip) / 2; // length in samples
+	soundicon_tab[index].data = p;
+	return ENS_OK;
+}
+
+int LookupSoundicon(int c)
+{
+	// Find the sound icon number for a punctuation character
+	int ix;
+
+	for (ix = N_SOUNDICON_SLOTS; ix < n_soundicon_tab; ix++) {
+		if (soundicon_tab[ix].name == c) {
+			if (soundicon_tab[ix].length == 0) {
+				if (LoadSoundFile(NULL, ix, NULL) != ENS_OK)
+					return -1; // sound file is not available
+			}
+			return ix;
+		}
+	}
+	return -1;
+}
+
+int LoadSoundFile2(const char *fname)
+{
+	// Load a sound file into one of the reserved slots in the sound icon table
+	// (if it'snot already loaded)
+
+	int ix;
+	static int slot = -1;
+
+	for (ix = 0; ix < n_soundicon_tab; ix++) {
+		if (((soundicon_tab[ix].filename != NULL) && strcmp(fname, soundicon_tab[ix].filename) == 0))
+			return ix; // already loaded
+	}
+
+	// load the file into the next slot
+	slot++;
+	if (slot >= N_SOUNDICON_SLOTS)
+		slot = 0;
+
+	if (LoadSoundFile(fname, slot, NULL) != ENS_OK)
+		return -1;
+
+	soundicon_tab[slot].filename = (char *)realloc(soundicon_tab[ix].filename, strlen(fname)+1);
+	strcpy(soundicon_tab[slot].filename, fname);
+	return slot;
+}
diff --git a/src/libespeak-ng/soundicon.h b/src/libespeak-ng/soundicon.h
new file mode 100644
index 00000000..81c54827
--- /dev/null
+++ b/src/libespeak-ng/soundicon.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2005 to 2014 by Jonathan Duddington
+ * email: jonsd@users.sourceforge.net
+ * Copyright (C) 2015-2017 Reece H. Dunn
+ * Copyright (C) 2021 Juho Hiltunen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see: <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ESPEAK_NG_SOUNDICON_H
+#define ESPEAK_NG_SOUNDICON_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+int LookupSoundicon(int c);
+int LoadSoundFile2(const char *fname);
+
+typedef struct {
+        int name;
+        int length;
+        char *data;
+        char *filename;
+} SOUND_ICON;
+
+#define N_SOUNDICON_TAB  80   // total entries in soundicon_tab
+#define N_SOUNDICON_SLOTS 4    // number of slots reserved for dynamic loading of audio files
+
+extern int n_soundicon_tab;
+extern SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/libespeak-ng/ssml.c b/src/libespeak-ng/ssml.c
index ce2232ec..3398af20 100644
--- a/src/libespeak-ng/ssml.c
+++ b/src/libespeak-ng/ssml.c
@@ -43,6 +43,7 @@
 #include "dictionary.h"           // for strncpy0
 #include "mnemonics.h"               // for LookupMnemName, MNEM_TAB, 
 #include "readclause.h"           // for PARAM_STACK, param_stack, AddNameData
+#include "soundicon.h"               // for LoadSoundFile2
 #include "synthesize.h"           // for SPEED_FACTORS, speed
 #include "translate.h"            // for CTRL_EMBEDDED, IsDigit09, utf8_out
 #include "voice.h"                // for SelectVoice, SelectVoiceByName
diff --git a/src/libespeak-ng/synthdata.c b/src/libespeak-ng/synthdata.c
index 0f802b9c..013b9896 100644
--- a/src/libespeak-ng/synthdata.c
+++ b/src/libespeak-ng/synthdata.c
@@ -36,6 +36,7 @@
 #include "phoneme.h"                  // for PHONEME_TAB, PHONEME_TAB_LIST
 #include "speech.h"                   // for path_home, GetFileLength, PATHSEP
 #include "mbrola.h"                   // for mbrola_name
+#include "soundicon.h"               // for N_SOUNDICON_SLOTS, soundicon_tab
 #include "synthesize.h"               // for PHONEME_LIST, frameref_t, PHONE...
 #include "translate.h"                // for Translator, LANGUAGE_OPTIONS
 #include "voice.h"                    // for ReadTonePoints, tone_points, voice
diff --git a/src/libespeak-ng/synthesize.c b/src/libespeak-ng/synthesize.c
index dde10b6a..90d2e965 100644
--- a/src/libespeak-ng/synthesize.c
+++ b/src/libespeak-ng/synthesize.c
@@ -38,6 +38,7 @@
 #include "mbrola.h"               // for MbrolaGenerate, mbrola_name
 #include "phoneme.h"              // for PHONEME_TAB, phVOWEL, phLIQUID, phN...
 #include "setlengths.h"           // for CalcLengths
+#include "soundicon.h"               // for soundicon_tab, n_soundicon
 #include "synthdata.h"            // for InterpretPhoneme, GetEnvelope, Inte...
 #include "translate.h"            // for translator, LANGUAGE_OPTIONS, Trans...
 #include "voice.h"                // for voice_t, voice, LoadVoiceVariant
@@ -66,9 +67,6 @@ static int syllable_centre;
 
 static voice_t *new_voice = NULL;
 
-int n_soundicon_tab = N_SOUNDICON_SLOTS;
-SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];
-
 #define RMS_GLOTTAL1 35   // vowel before glottal stop
 #define RMS_START 28  // 28
 #define VOWEL_FRONT_LENGTH  50
diff --git a/src/libespeak-ng/synthesize.h b/src/libespeak-ng/synthesize.h
index f6a7b0e4..e12ae803 100644
--- a/src/libespeak-ng/synthesize.h
+++ b/src/libespeak-ng/synthesize.h
@@ -334,13 +334,6 @@ typedef struct {
 
 #define i_StressLevel  0x800
 
-typedef struct {
-	int name;
-	int length;
-	char *data;
-	char *filename;
-} SOUND_ICON;
-
 typedef struct {
 	int pause_factor;
 	int clause_pause_factor;
@@ -479,11 +472,6 @@ extern espeak_EVENT *event_list;
 extern t_espeak_callback *synth_callback;
 extern const int version_phdata;
 
-#define N_SOUNDICON_TAB  80   // total entries in soundicon_tab
-#define N_SOUNDICON_SLOTS 4    // number of slots reserved for dynamic loading of audio files
-extern int n_soundicon_tab;
-extern SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];
-
 void DoEmbedded(int *embix, int sourceix);
 void DoMarker(int type, int char_posn, int length, int value);
 void DoPhonemeMarker(int type, int char_posn, int length, char *name);