diff --git a/lib/audio.c b/lib/audio.c
index faa9cb4..f6e94eb 100644
--- a/lib/audio.c
+++ b/lib/audio.c
@@ -15,7 +15,7 @@
 #define AUDIO_TICKS_PER_SAMPLE 2157281.28 / SAMPLE_RATE
 #define TIME_PER_WAVE_TICK 1.0f / (2104718.0f/1000.0f/1000.0f)
 #define LFSR_BASE_CLOCK 262144.0f
-#define AUDIO_BUFFER_SIZE 10240
+#define AUDIO_BUFFER_SIZE (int)(SAMPLE_RATE / 10)
 
 static audio_context ctx;
 
@@ -37,6 +37,10 @@ const int history_interval = 5;
 static int lfsr_clocks = 0;
 static double samples_occured = 0;
 
+float LPF_Beta = 0.025;
+float smooth_left = 0;
+float smooth_right = 0;
+
 const u8 square_sample_00[8] = {
     0x0,
     0xF,
@@ -100,7 +104,7 @@ static int audio_callback(const void* input_uffer, void *output_buffer,
     for(int i = 0; i < framesPerBuffer; i++) {
         //samples_occured = samples_occured + AUDIO_TICKS_PER_SAMPLE-1;
         while(ctx.buffer_cnt == 0) {
-            //delay(1);
+            delay(1);
         }
         if(ctx.buffer_cnt == 0) {
             //samples_occured = samples_occured - ((int)samples_occured - ctx.buffer_cnt);
@@ -344,6 +348,7 @@ void audio_init(){
     output_parameters.sampleFormat = paFloat32;
     output_parameters.suggestedLatency = Pa_GetDeviceInfo(output_parameters.device)->defaultLowOutputLatency;
     output_parameters.hostApiSpecificStreamInfo = NULL;
+    printf("default sample rate: %lf\n", Pa_GetDeviceInfo(output_parameters.device)->defaultSampleRate);
 
     err = Pa_OpenStream(&stream,
                         NULL,
@@ -552,15 +557,21 @@ void audio_period_tick() {
             ctx.ch4_index = 0;
         }
     }
+
+    smooth_left = smooth_left - (LPF_Beta * (smooth_left - left));
+    smooth_right = smooth_right - (LPF_Beta * (smooth_right - right));
     
     if((period_tick % (int)(AUDIO_TICKS_PER_SAMPLE)) == 0){
         //printf("tick\n");
         while(ctx.buffer_cnt == AUDIO_BUFFER_SIZE){
-            //delay(1);
+            //ctx.buffer_cnt--;
+            //ctx.sq1_read_index++;
+            //ctx.sq1_read_index %= AUDIO_BUFFER_SIZE;
+            delay(10);
             //printf("overflow\n");
         }
-        ctx.sq1_audio_buffer[(ctx.sq1_write_index)] = left;
-        ctx.sq2_audio_buffer[(ctx.sq1_write_index)] = right;
+        ctx.sq1_audio_buffer[(ctx.sq1_write_index)] = smooth_left;
+        ctx.sq2_audio_buffer[(ctx.sq1_write_index)] = smooth_right;
         //ctx.ch3_audio_buffer[(ctx.sq1_write_index)] = (((float)(ctx.ch3_last_sample >> shift)-7.5f)/7.5f);
         //ctx.ch4_audio_buffer[(ctx.sq1_write_index)] = (ctx.ch4_lfsr & 0b1) ? (float)(ctx.ch4_volume-7.5f)/7.5f : -1.0f;
         ctx.sq1_write_index = (ctx.sq1_write_index + 1) % AUDIO_BUFFER_SIZE;