diff --git a/synth/.gitignore b/synth/.gitignore
new file mode 100644
index 0000000..6569f67
--- /dev/null
+++ b/synth/.gitignore
@@ -0,0 +1 @@
+synth
diff --git a/synth/Makefile b/synth/Makefile
new file mode 100644
index 0000000..903f57e
--- /dev/null
+++ b/synth/Makefile
@@ -0,0 +1,2 @@
+all:
+	gcc -std=gnu99 main.c synth.c -O2 -lSDL -o synth
diff --git a/synth/main.c b/synth/main.c
new file mode 100644
index 0000000..2e0c27c
--- /dev/null
+++ b/synth/main.c
@@ -0,0 +1,31 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <SDL/SDL.h>
+
+#include "synth.h"
+
+
+static void fill_buffer(void* userdata, Uint8* stream, int len) {
+	for(int i = 0; i < len / 2; i++) ((uint16_t*)stream)[i] = synth_mix() * 100;
+}
+
+SDL_AudioSpec spec = { 8000000 / (3 * 64), AUDIO_U16SYS, 1, 0, 1024, };
+
+int main(int argc ,char** argv) {
+
+	synth_init();
+
+	spec.callback = &fill_buffer;
+	if(SDL_OpenAudio(&spec, &spec) < 0) {
+		fprintf(stderr, "ERROR");
+		exit(1);
+	}
+	printf("freq = %d\n", spec.freq);
+
+	SDL_PauseAudio(0);
+
+	getchar();
+
+	return 0;
+}
diff --git a/synth/synth.c b/synth/synth.c
new file mode 120000
index 0000000..482a33e
--- /dev/null
+++ b/synth/synth.c
@@ -0,0 +1 @@
+../firmware/synth.c
\ No newline at end of file
diff --git a/synth/synth.h b/synth/synth.h
new file mode 120000
index 0000000..c1ea587
--- /dev/null
+++ b/synth/synth.h
@@ -0,0 +1 @@
+../firmware/synth.h
\ No newline at end of file