diff --git a/chips/beeper.h b/chips/beeper.h
index 90874c0..a058c8f 100644
--- a/chips/beeper.h
+++ b/chips/beeper.h
@@ -32,7 +32,7 @@ extern "C" {
 // error-accumulation precision boost
 #define BEEPER_FIXEDPOINT_SCALE (16)
 // DC adjust buffer size
-#define BEEPER_DCADJ_BUFLEN (512)
+#define BEEPER_DCADJ_BUFLEN (128)
 
 // initialization parameters
 typedef struct {
@@ -107,20 +107,20 @@ void beeper_reset(beeper_t* b) {
    from the chip simulation which is >0.0 gets converted to
    a +/- sample value)
 */
-static float _beeper_dcadjust(beeper_t* bp, float s) {
+static void _beeper_dcadjust(beeper_t* bp, float s) {
     bp->dcadj_sum -= bp->dcadj_buf[bp->dcadj_pos];
     bp->dcadj_sum += s;
     bp->dcadj_buf[bp->dcadj_pos] = s;
     bp->dcadj_pos = (bp->dcadj_pos + 1) & (BEEPER_DCADJ_BUFLEN-1);
-    return s - (bp->dcadj_sum / BEEPER_DCADJ_BUFLEN);
 }
 
 bool beeper_tick(beeper_t* bp) {
+    _beeper_dcadjust(bp, (float)bp->state * bp->volume * bp->base_volume);
     /* generate a new sample? */
     bp->counter -= BEEPER_FIXEDPOINT_SCALE;
     if (bp->counter <= 0) {
         bp->counter += bp->period;
-        bp->sample = _beeper_dcadjust(bp, (float)bp->state * bp->volume * bp->base_volume);
+        bp->sample = bp->dcadj_sum / BEEPER_DCADJ_BUFLEN;
         return true;
     }
     return false;