diff --git b/libs/fluidsynth/fluidsynth/synth.h a/libs/fluidsynth/fluidsynth/synth.h
index 369a2c2615..87826809fd 100644
--- b/libs/fluidsynth/fluidsynth/synth.h
+++ a/libs/fluidsynth/fluidsynth/synth.h
@@ -233,7 +233,7 @@ FLUIDSYNTH_API int fluid_synth_tuning_dump(fluid_synth_t *synth, int bank, int p
 /* Misc */
 
 FLUIDSYNTH_API double fluid_synth_get_cpu_load(fluid_synth_t *synth);
-FLUID_DEPRECATED FLUIDSYNTH_API const char *fluid_synth_error(fluid_synth_t *synth);
+const char *fluid_synth_error(fluid_synth_t *synth);
 
 
 /* Default modulators */
@@ -265,7 +265,7 @@ FLUIDSYNTH_API int fluid_synth_write_s16(fluid_synth_t *synth, int len,
 FLUIDSYNTH_API int fluid_synth_write_float(fluid_synth_t *synth, int len,
         void *lout, int loff, int lincr,
         void *rout, int roff, int rincr);
-FLUID_DEPRECATED FLUIDSYNTH_API int fluid_synth_nwrite_float(fluid_synth_t *synth, int len,
+FLUIDSYNTH_API int fluid_synth_nwrite_float(fluid_synth_t *synth, int len,
         float **left, float **right,
         float **fx_left, float **fx_right);
 FLUIDSYNTH_API int fluid_synth_process(fluid_synth_t *synth, int len,
@@ -310,7 +310,9 @@ FLUIDSYNTH_API int fluid_synth_set_custom_filter(fluid_synth_t *, int type, int
 
 /* LADSPA */
 
+#ifdef LADSPA
 FLUIDSYNTH_API fluid_ladspa_fx_t *fluid_synth_get_ladspa_fx(fluid_synth_t *synth);
+#endif
 
 
 /* API: Poly mono mode */
diff --git b/libs/fluidsynth/fluidsynth/types.h a/libs/fluidsynth/fluidsynth/types.h
index 47ef18336a..5ad29281ad 100644
--- b/libs/fluidsynth/fluidsynth/types.h
+++ a/libs/fluidsynth/fluidsynth/types.h
@@ -56,7 +56,9 @@ typedef struct _fluid_sequencer_t fluid_sequencer_t;            /**< Sequencer i
 typedef struct _fluid_ramsfont_t fluid_ramsfont_t;              /**< RAM SoundFont */
 typedef struct _fluid_rampreset_t fluid_rampreset_t;            /**< RAM SoundFont preset */
 typedef struct _fluid_cmd_handler_t fluid_cmd_handler_t;        /**< Shell Command Handler */
+#ifdef LADSPA
 typedef struct _fluid_ladspa_fx_t fluid_ladspa_fx_t;            /**< LADSPA effects instance */
+#endif
 typedef struct _fluid_file_callbacks_t fluid_file_callbacks_t;  /**< Callback struct to perform custom file loading of soundfonts */
 
 typedef int fluid_istream_t;    /**< Input stream descriptor */
diff --git b/libs/fluidsynth/src/fluid_conv.h a/libs/fluidsynth/src/fluid_conv.h
index 60f441c49f..e6455186eb 100644
--- b/libs/fluidsynth/src/fluid_conv.h
+++ a/libs/fluidsynth/src/fluid_conv.h
@@ -22,7 +22,7 @@
 #define _FLUID_CONV_H
 
 #include "fluidsynth_priv.h"
-#include "utils/fluid_conv_tables.h"
+#include "fluid_conv_tables.h"
 
 fluid_real_t fluid_ct2hz_real(fluid_real_t cents);
 fluid_real_t fluid_ct2hz(fluid_real_t cents);
diff --git b/libs/fluidsynth/src/fluid_hash.c a/libs/fluidsynth/src/fluid_hash.c
index 946a873bbf..79f83a4583 100644
--- b/libs/fluidsynth/src/fluid_hash.c
+++ a/libs/fluidsynth/src/fluid_hash.c
@@ -991,6 +991,7 @@ fluid_hashtable_remove_all(fluid_hashtable_t *hashtable)
     fluid_hashtable_maybe_resize(hashtable);
 }
 
+#if 0
 /**
  * fluid_hashtable_steal_all:
  * @hashtable: a #fluid_hashtable_t.
@@ -1008,6 +1009,7 @@ fluid_hashtable_steal_all(fluid_hashtable_t *hashtable)
     fluid_hashtable_remove_all_nodes(hashtable, FALSE);
     fluid_hashtable_maybe_resize(hashtable);
 }
+#endif
 
 /*
  * fluid_hashtable_foreach_remove_or_steal:
diff --git b/libs/fluidsynth/src/fluid_midi.c a/libs/fluidsynth/src/fluid_midi.c
index 6e527b1822..5b2efe0b9b 100644
--- b/libs/fluidsynth/src/fluid_midi.c
+++ a/libs/fluidsynth/src/fluid_midi.c
@@ -77,7 +77,7 @@ static int fluid_midi_file_read_tracklen(fluid_midi_file *mf);
 static int fluid_midi_file_eot(fluid_midi_file *mf);
 static int fluid_midi_file_get_division(fluid_midi_file *midifile);
 
-
+#if 0 // disable file I/O with Ardour
 /***************************************************************
  *
  *                      MIDIFILE
@@ -1048,6 +1048,7 @@ fluid_midi_file_get_division(fluid_midi_file *midifile)
 {
     return midifile->division;
 }
+#endif
 
 /******************************************************
  *
@@ -1414,7 +1415,7 @@ static void fluid_midi_event_get_sysex_LOCAL(fluid_midi_event_t *evt, void **dat
  *
  *     fluid_track_t
  */
-
+#if 0 // disable fluid file player in Ardour
 /*
  * new_fluid_track
  */
@@ -2518,3 +2519,4 @@ fluid_midi_event_length(unsigned char event)
 
     return 1;
 }
+#endif
diff --git b/libs/fluidsynth/src/fluid_mod.c a/libs/fluidsynth/src/fluid_mod.c
index 84e97731e5..5e57455d4d 100644
--- b/libs/fluidsynth/src/fluid_mod.c
+++ a/libs/fluidsynth/src/fluid_mod.c
@@ -603,7 +603,7 @@ fluid_mod_check_cc_source(const fluid_mod_t *mod, unsigned char src1_select)
  * @param name,if not NULL, pointer on a string displayed as a warning.
  * @return TRUE if modulator sources src1, src2 are valid, FALSE otherwise.
  */
-int fluid_mod_check_sources(const fluid_mod_t *mod, char *name)
+int fluid_mod_check_sources(const fluid_mod_t *mod, const char *name)
 {
     static const char *invalid_non_cc_src =
         "Invalid modulator, using non-CC source %s.src%d=%d";
diff --git b/libs/fluidsynth/src/fluid_mod.h a/libs/fluidsynth/src/fluid_mod.h
index 3e7661741f..ec8e967a35 100644
--- b/libs/fluidsynth/src/fluid_mod.h
+++ a/libs/fluidsynth/src/fluid_mod.h
@@ -44,7 +44,7 @@ struct _fluid_mod_t
 };
 
 fluid_real_t fluid_mod_get_value(fluid_mod_t *mod, fluid_voice_t *voice);
-int fluid_mod_check_sources(const fluid_mod_t *mod, char *name);
+int fluid_mod_check_sources(const fluid_mod_t *mod, const char *name);
 
 #ifdef DEBUG
 void fluid_dump_modulator(fluid_mod_t *mod);
diff --git b/libs/fluidsynth/src/fluid_rvoice_mixer.c a/libs/fluidsynth/src/fluid_rvoice_mixer.c
index 85c3fb9142..5ea08ff6fa 100644
--- b/libs/fluidsynth/src/fluid_rvoice_mixer.c
+++ a/libs/fluidsynth/src/fluid_rvoice_mixer.c
@@ -23,7 +23,6 @@
 #include "fluid_sys.h"
 #include "fluid_rev.h"
 #include "fluid_chorus.h"
-#include "fluid_ladspa.h"
 #include "fluid_synth.h"
 
 
diff --git b/libs/fluidsynth/src/fluid_rvoice_mixer.h a/libs/fluidsynth/src/fluid_rvoice_mixer.h
index 4ee072e4b9..1b3fceb342 100644
--- b/libs/fluidsynth/src/fluid_rvoice_mixer.h
+++ a/libs/fluidsynth/src/fluid_rvoice_mixer.h
@@ -24,7 +24,6 @@
 
 #include "fluidsynth_priv.h"
 #include "fluid_rvoice.h"
-#include "fluid_ladspa.h"
 
 typedef struct _fluid_rvoice_mixer_t fluid_rvoice_mixer_t;
 
diff --git b/libs/fluidsynth/src/fluid_settings.c a/libs/fluidsynth/src/fluid_settings.c
index 5b2b08748f..1811169846 100644
--- b/libs/fluidsynth/src/fluid_settings.c
+++ a/libs/fluidsynth/src/fluid_settings.c
@@ -21,9 +21,6 @@
 #include "fluid_sys.h"
 #include "fluid_hash.h"
 #include "fluid_synth.h"
-#include "fluid_cmd.h"
-#include "fluid_adriver.h"
-#include "fluid_mdriver.h"
 #include "fluid_settings.h"
 #include "fluid_midi.h"
 
@@ -328,11 +325,13 @@ fluid_settings_init(fluid_settings_t *settings)
     fluid_return_if_fail(settings != NULL);
 
     fluid_synth_settings(settings);
+#if 0
     fluid_shell_settings(settings);
     fluid_player_settings(settings);
     fluid_file_renderer_settings(settings);
     fluid_audio_driver_settings(settings);
     fluid_midi_driver_settings(settings);
+#endif
 }
 
 static int
diff --git b/libs/fluidsynth/src/fluid_synth.c a/libs/fluidsynth/src/fluid_synth.c
index b72d5139ef..83d427fcac 100644
--- b/libs/fluidsynth/src/fluid_synth.c
+++ a/libs/fluidsynth/src/fluid_synth.c
@@ -267,7 +267,7 @@ void fluid_version(int *major, int *minor, int *micro)
  * @return FluidSynth version string, which is internal and should not be
  *   modified or freed.
  */
-char *
+const char *
 fluid_version_str(void)
 {
     return FLUIDSYNTH_VERSION;
@@ -6419,6 +6419,7 @@ int fluid_synth_set_channel_type(fluid_synth_t *synth, int chan, int type)
     FLUID_API_RETURN(FLUID_OK);
 }
 
+#ifdef LADSPA
 /**
  * Return the LADSPA effects instance used by FluidSynth
  *
@@ -6431,6 +6432,7 @@ fluid_ladspa_fx_t *fluid_synth_get_ladspa_fx(fluid_synth_t *synth)
 
     return synth->ladspa_fx;
 }
+#endif
 
 /**
  * Configure a general-purpose IIR biquad filter.
diff --git b/libs/fluidsynth/src/fluid_synth.h a/libs/fluidsynth/src/fluid_synth.h
index f061aeaf38..2b35f1fcb0 100644
--- b/libs/fluidsynth/src/fluid_synth.h
+++ a/libs/fluidsynth/src/fluid_synth.h
@@ -33,8 +33,6 @@
 #include "fluid_rev.h"
 #include "fluid_voice.h"
 #include "fluid_chorus.h"
-#include "fluid_ladspa.h"
-#include "fluid_midi_router.h"
 #include "fluid_rvoice_event.h"
 
 /***************************************************************
@@ -165,7 +163,9 @@ struct _fluid_synth_t
 
     fluid_mod_t *default_mod;          /**< the (dynamic) list of default modulators */
 
+#ifdef LADSPA
     fluid_ladspa_fx_t *ladspa_fx;      /**< Effects unit for LADSPA support */
+#endif
     enum fluid_iir_filter_type custom_filter_type; /**< filter type of the user-defined filter currently used for all voices */
     enum fluid_iir_filter_flags custom_filter_flags; /**< filter type of the user-defined filter currently used for all voices */
 };
diff --git b/libs/fluidsynth/src/fluid_sys.c a/libs/fluidsynth/src/fluid_sys.c
index 4225583481..22694f21c5 100644
--- b/libs/fluidsynth/src/fluid_sys.c
+++ a/libs/fluidsynth/src/fluid_sys.c
@@ -205,9 +205,10 @@ fluid_log(int level, const char *fmt, ...)
  * @param delim String of delimiter chars.
  * @return Pointer to the next token or NULL if no more tokens.
  */
-char *fluid_strtok(char **str, char *delim)
+char *fluid_strtok(char **str, const char *delim)
 {
-    char *s, *d, *token;
+    char *s,  *token;
+		const char *d;
     char c;
 
     if(str == NULL || delim == NULL || !*delim)
diff --git b/libs/fluidsynth/src/fluid_sys.h a/libs/fluidsynth/src/fluid_sys.h
index 65c088ca3c..5d82b686dd 100644
--- b/libs/fluidsynth/src/fluid_sys.h
+++ a/libs/fluidsynth/src/fluid_sys.h
@@ -128,8 +128,9 @@ typedef guint64  uint64_t;
 #endif
 
 #if defined(WIN32) &&  HAVE_WINDOWS_H
-#include <winsock2.h>
-#include <ws2tcpip.h>	/* Provides also socklen_t */
+//#include <winsock2.h>
+//#include <ws2tcpip.h>	/* Provides also socklen_t */
+#include <windows.h>
 
 /* WIN32 special defines */
 #define STDIN_FILENO 0
@@ -187,7 +188,7 @@ typedef guint64  uint64_t;
 /*
  * Utility functions
  */
-char *fluid_strtok(char **str, char *delim);
+char *fluid_strtok(char **str, const char *delim);
 
 
 #if defined(__OS2__)
