diff --git a/src/engine/platform/sound/pce_psg.cpp b/src/engine/platform/sound/pce_psg.cpp
index 689e2275a..849ba282f 100644
--- a/src/engine/platform/sound/pce_psg.cpp
+++ b/src/engine/platform/sound/pce_psg.cpp
@@ -78,7 +78,7 @@ inline void PCE_PSG::UpdateOutputSub(const int32_t timestamp, psg_channel *ch, c
  if (delta[0]) blip_add_delta(bb[0],timestamp,delta[0]);
  if (delta[1]) blip_add_delta(bb[1],timestamp,delta[1]);
 
- ch->oscBuf->putSample(timestamp-ch->lasttsbase,CLAMP(samp0+samp1,-32768,32767));
+ ch->oscBuf->putSample(timestamp,CLAMP(samp0+samp1,-32768,32767));
 
  ch->blip_prev_samp[0] = samp0;
  ch->blip_prev_samp[1] = samp1;
@@ -409,13 +409,11 @@ PCE_PSG::PCE_PSG(int want_revision)
   bb[1]=NULL;
 
   lastts = 0;
-  lasttsbase = 0;
   for(int ch = 0; ch < 6; ch++)
   {
    channel[ch].blip_prev_samp[0] = 0;
    channel[ch].blip_prev_samp[1] = 0;
    channel[ch].lastts = 0;
-   channel[ch].lasttsbase = 0;
   }
 
   SetVolume(1.0);  // Will build dbtable in the process.
@@ -753,11 +751,9 @@ void PCE_PSG::Update(int32_t timestamp)
 void PCE_PSG::ResetTS(int32_t ts_base)
 {
  lastts = ts_base;
- lasttsbase = ts_base;
 
  for(int chc = 0; chc < 6; chc++) {
   channel[chc].lastts = ts_base;
-  channel[chc].lasttsbase = ts_base;
  }
 }
 
diff --git a/src/engine/platform/sound/pce_psg.h b/src/engine/platform/sound/pce_psg.h
index 8c72a7f12..43d9d66aa 100644
--- a/src/engine/platform/sound/pce_psg.h
+++ b/src/engine/platform/sound/pce_psg.h
@@ -52,7 +52,6 @@ struct psg_channel
   int32_t samp_accum;         // The result of adding up all the samples in the waveform buffer(part of an optimization for high-frequency playback).
   int32_t blip_prev_samp[2];
   int32_t lastts;
-  int32_t lasttsbase;
 
   uint16_t frequency;       /* Channel frequency */
   uint8_t balance;          /* Channel balance */
@@ -187,7 +186,6 @@ class PCE_PSG
   bool vol_pending;
 
   int32_t lastts;
-  int32_t lasttsbase;
   int revision;
 
   int32_t dbtable_volonly[32];