diff --git a/templates/android/src/data.h b/templates/android/src/data.h
index 9e8d5f8..9a9cde6 100644
--- a/templates/android/src/data.h
+++ b/templates/android/src/data.h
@@ -4,8 +4,8 @@
 #define AUDIO_BUS_IN			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)}}
 #define AUDIO_BUS_OUT			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)}}
 
-#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
-#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
 #define NUM_NON_OPT_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_NON_OPT_CHANNELS_OUT	{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_ALL_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input").reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
diff --git a/templates/cmd/src/data.h b/templates/cmd/src/data.h
index 57ba021..129f8c6 100644
--- a/templates/cmd/src/data.h
+++ b/templates/cmd/src/data.h
@@ -4,8 +4,8 @@
 #define AUDIO_BUS_IN			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)}}
 #define AUDIO_BUS_OUT			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)}}
 
-#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
-#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
 #define NUM_NON_OPT_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_NON_OPT_CHANNELS_OUT	{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_ALL_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input").reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
diff --git a/templates/daisy-seed/src/data.h b/templates/daisy-seed/src/data.h
index cfb47d3..9b21578 100644
--- a/templates/daisy-seed/src/data.h
+++ b/templates/daisy-seed/src/data.h
@@ -4,8 +4,8 @@
 #define AUDIO_BUS_IN			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)}}
 #define AUDIO_BUS_OUT			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)}}
 
-#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
-#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
 #define NUM_NON_OPT_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_NON_OPT_CHANNELS_OUT	{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_ALL_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input").reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
diff --git a/templates/ios/src/data.h b/templates/ios/src/data.h
index bcb149e..8936d71 100644
--- a/templates/ios/src/data.h
+++ b/templates/ios/src/data.h
@@ -4,8 +4,8 @@
 #define AUDIO_BUS_IN			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)}}
 #define AUDIO_BUS_OUT			{{=it.product.buses.findIndex(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)}}
 
-#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
-#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional) ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_IN			{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
+#define NUM_CHANNELS_OUT		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional).length > 0 ? (it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.cv && !x.sidechain && !x.optional)[0].channels == "mono" ? 1 : 2) : 0}}
 #define NUM_NON_OPT_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_NON_OPT_CHANNELS_OUT	{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "output" && !x.optional).reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}
 #define NUM_ALL_CHANNELS_IN		{{=it.product.buses.filter(x => x.type == "audio" && x.direction == "input").reduce((a, x) => a + (x.channels == "mono" ? 1 : 2), 0)}}