From 5b298f10bab31ea2d64e72894f75904ee1233008 Mon Sep 17 00:00:00 2001
From: Paul Ferrand <paul@ferrand.cc>
Date: Sat, 4 Jul 2020 13:55:07 +0200
Subject: [PATCH] "Clear" the synth by loading an empty instrument For
 instruments saved without the default sine, this should keep them from
 sounding

---
 lv2/resources/EmptyInstrument.sfz |  0
 lv2/sfizz.c                       | 13 +++++++++++++
 2 files changed, 13 insertions(+)
 create mode 100644 lv2/resources/EmptyInstrument.sfz

diff --git a/lv2/resources/EmptyInstrument.sfz b/lv2/resources/EmptyInstrument.sfz
new file mode 100644
index 00000000..e69de29b
diff --git a/lv2/sfizz.c b/lv2/sfizz.c
index 4f9fab1e..ffe1d3e1 100644
--- a/lv2/sfizz.c
+++ b/lv2/sfizz.c
@@ -305,6 +305,13 @@ sfizz_lv2_get_default_sfz_path(LV2_Handle instance, char *path, size_t size)
     snprintf(path, size, "%s/%s", self->bundle_path, "Resources/DefaultInstrument.sfz");
 }
 
+static void
+sfizz_lv2_get_empty_sfz_path(LV2_Handle instance, char *path, size_t size)
+{
+    sfizz_plugin_t *self = (sfizz_plugin_t *)instance;
+    snprintf(path, size, "%s/%s", self->bundle_path, "Resources/EmptyInstrument.sfz");
+}
+
 static void
 sfizz_lv2_get_default_scala_path(LV2_Handle instance, char *path, size_t size)
 {
@@ -967,6 +974,11 @@ restore(LV2_Handle instance,
         }
 
         lv2_log_note(&self->logger, "[sfizz] Restoring the file %s\n", path);
+        // Load an empty file to remove the default sine
+        sfizz_lv2_get_empty_sfz_path(instance, self->sfz_file_path, MAX_PATH_SIZE);
+        sfizz_lv2_load_file(instance, self->sfz_file_path);
+
+        // Try loading the new file
         sfizz_lv2_load_file(instance, path);
 
         if (map_path)
@@ -1144,6 +1156,7 @@ work(LV2_Handle instance,
      uint32_t size,
      const void *data)
 {
+    UNUSED(size);
     sfizz_plugin_t *self = (sfizz_plugin_t *)instance;
     if (!data) {
         lv2_log_error(&self->logger, "[sfizz] Ignoring empty data in the worker thread\n");