diff --git a/stereo_mix/processor.cc b/stereo_mix/processor.cc
index 6a8d686..bcd5a92 100644
--- a/stereo_mix/processor.cc
+++ b/stereo_mix/processor.cc
@@ -6,47 +6,43 @@
 using namespace stereo_mix;
 using namespace stmlib;
 
-const int kVolumeFilterValue = 65535;
-
 void Processor::Process(int16_t cvs[], uint16_t* outs)
 {
   uint32_t value_l;
   uint32_t value_r;
 
-  uint16_t pan_pot = (pan_offset + 32767L) >> (16 - 12); // adc is only 12 bit anyways
-  uint16_t vol_pot = (volume_offset) >> (16 - 12);
-  int16_t pan_cv = cvs[0] >> (16 - 12);
-  int16_t vol_cv = cvs[1] >> (16 - 12);
+  uint16_t pan_pot = (pan_offset + 32767L);
+  uint16_t vol_pot = (volume_offset);
+  int16_t pan_cv = cvs[0];
+  int16_t vol_cv = cvs[1];
   int32_t pan = pan_pot + pan_cv;
 
   // calculate value for ui
-  int32_t lin = volume_offset + (cvs[1] * 2);
+  int32_t lin = volume_offset + (cvs[1] << 1);
   CONSTRAIN(lin, 0, 65535);
   lin *= !mute;
-  linear_vol = lin;
+  this->linear_vol = lin;
 
-  uint16_t vol_pot_exp = lut_linear_to_exp[vol_pot];
-  uint16_t vol_pot_log = 65535 - lut_linear_to_exp[LUT_LINEAR_TO_EXP_SIZE - 1 - vol_pot];
+  uint16_t vol_pot_exp = Interpolate124(lut_linear_to_exp, vol_pot);
+  uint16_t vol_pot_log = 65535 - InverseInterpolate124(lut_linear_to_exp, vol_pot);
 
   vol_pot = Mix(vol_pot_exp, vol_pot_log, log_exp_mix_pot);
-  vol_pot = vol_pot_exp;
   int32_t vol = vol_pot;
 
   uint16_t vol_cv_absu16 = abs(vol_cv);
-  uint16_t vol_cv_exp = lut_linear_to_exp[vol_cv_absu16];
-  uint16_t vol_cv_log = 65535 - lut_linear_to_exp[LUT_LINEAR_TO_EXP_SIZE - 1 - vol_cv_absu16];
+  uint16_t vol_cv_exp = Interpolate124(lut_linear_to_exp, vol_cv_absu16);
+  uint16_t vol_cv_log = 65535 - InverseInterpolate124(lut_linear_to_exp, vol_cv_absu16);
   uint16_t vol_cv_pre = Mix(vol_cv_exp, vol_cv_log, log_exp_mix_cv);
   vol += vol_cv > 0 ? vol_cv_pre : -vol_cv_pre;
   vol *= !mute;
 
-  CONSTRAIN(pan, 0, 4095);
+  CONSTRAIN(pan, 0, 65535);
   CONSTRAIN(vol, 0, 65535);
 
-  previous_vol = vol;
+  this->previous_vol = vol;
 
-  // leds.set_intensity(i, vol >> 4);
-  value_l = (lut_left_sin_pan[pan] * vol) >> 16;
-  value_r = (lut_right_cos_pan[pan] * vol) >> 16;
+  value_l = (Interpolate124(lut_left_sin_pan, pan) * vol) >> 16;
+  value_r = (Interpolate124(lut_right_cos_pan, pan) * vol) >> 16;
 
   outs[0] = value_r;
   outs[1] = value_l;
diff --git a/stmlib b/stmlib
index 93e97d1..bac07fc 160000
--- a/stmlib
+++ b/stmlib
@@ -1 +1 @@
-Subproject commit 93e97d160dc0d3613bf39c3a7a908e719ed24797
+Subproject commit bac07fcc33cbdf4f53528ba79f8b94ee8d0093bd