Patch based on https://sourceforge.net/p/dssi/fluidsynth-dssi/merge-requests/1

diff --git a/configure.ac b/configure.ac
index 365957d..dbf6d82 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,6 +33,12 @@ else
   echo "using fluid_synth_nwrite_float() workaround"
   echo "(You may wish to upgrade your FluidSynth to version 1.0.6 or later)"
 fi
+have200=no
+PKG_CHECK_EXISTS(fluidsynth >= 2.0.0, have200=yes)
+if test "x${have200}" = xyes ; then
+  echo "using FluidSynth API V2 (>= 2.0.0)"
+  AC_DEFINE(USE_FLUIDSYNTH_API_V2, 1, [Define to 1 if your libfluidsynth is version 2.0.0 or later])
+fi
 
 dnl Check for GTK+
 AC_ARG_WITH(gtk2, AC_HELP_STRING([--with-gtk2], [use GTK+ 2.0 default=yes]),
@@ -43,10 +49,6 @@ dnl First look for GTK+ 2.x, unless '--without-gtk2' was specified.
 if test "x${try_gtk2}" = 'xyes'; then
     AM_PATH_GTK_2_0(2.0.0, with_gtk='yes (version 2.0)', with_gtk=no)
 fi
-dnl  No GTK+ 2.x found, look for GTK+ 1.2 instead
-if test "x${with_gtk}" = 'xno'; then
-    AM_PATH_GTK(1.2.0, with_gtk='yes (version 1.2)', AC_MSG_WARN([GUI will not be built because no version of GTK+ was found]))
-fi
 AM_CONDITIONAL(BUILD_GUI, test "x${with_gtk}" != 'xno')
 echo "GTK support: $with_gtk"
 
diff --git a/src/fluidsynth-dssi.c b/src/fluidsynth-dssi.c
index 99436c3..428f5bd 100644
--- a/src/fluidsynth-dssi.c
+++ b/src/fluidsynth-dssi.c
@@ -167,7 +167,11 @@ fsd_get_soundfont(const char *path)
     fsd_sfont_t *sfont;
     int palloc;
     fluid_sfont_t *fluid_sfont;
+#ifdef USE_FLUIDSYNTH_API_V2
+    fluid_preset_t *preset;
+#else
     fluid_preset_t preset;
+#endif
 
     /* soundfont already loaded? */
     sfont = fsd_find_loaded_soundfont(path);
@@ -206,8 +210,13 @@ fsd_get_soundfont(const char *path)
         return NULL;
     }
     fluid_sfont = fluid_synth_get_sfont_by_id(fsd_synth.fluid_synth, sfont->sfont_id);
+#ifdef USE_FLUIDSYNTH_API_V2
+    fluid_sfont_iteration_start(fluid_sfont);
+    while ((preset = fluid_sfont_iteration_next(fluid_sfont)) != NULL) {
+#else
     fluid_sfont->iteration_start(fluid_sfont);
     while (fluid_sfont->iteration_next(fluid_sfont, &preset)) {
+#endif
         if (sfont->preset_count == palloc) {
             palloc *= 2;
             sfont->presets = (DSSI_Program_Descriptor *)realloc(sfont->presets,
@@ -219,9 +228,15 @@ fsd_get_soundfont(const char *path)
                 return NULL;
             }
         }
+#ifdef USE_FLUIDSYNTH_API_V2
+        sfont->presets[sfont->preset_count].Bank = fluid_preset_get_banknum(preset);
+        sfont->presets[sfont->preset_count].Program = fluid_preset_get_num(preset);
+        sfont->presets[sfont->preset_count].Name = fluid_preset_get_name(preset);
+#else
         sfont->presets[sfont->preset_count].Bank = preset.get_banknum(&preset);
         sfont->presets[sfont->preset_count].Program = preset.get_num(&preset);
         sfont->presets[sfont->preset_count].Name = preset.get_name(&preset);
+#endif
         sfont->preset_count++;
     }