diff --git a/src/engine/dispatch.h b/src/engine/dispatch.h
index 5607defc..da52342f 100644
--- a/src/engine/dispatch.h
+++ b/src/engine/dispatch.h
@@ -520,19 +520,34 @@ class DivDispatch {
 
     /**
      * Get sample memory buffer.
+     * @param index the memory index.
+     * @return a pointer to sample memory, or NULL.
      */
     virtual const void* getSampleMem(int index = 0);
 
     /**
      * Get sample memory capacity.
+     * @param index the memory index.
+     * @return memory capacity in bytes, or 0 if memory doesn't exist.
      */
     virtual size_t getSampleMemCapacity(int index = 0);
 
     /**
      * Get sample memory usage.
+     * @param index the memory index.
+     * @return memory usage in bytes.
      */
     virtual size_t getSampleMemUsage(int index = 0);
 
+    /**
+     * check whether sample has been loaded in memory.
+     * @param memory index.
+     * @param sample the sample in question.
+     * @return whether it did.
+     */
+    virtual bool isSampleLoaded(int index, int sample);
+    
+
     /**
      * Render samples into sample memory.
      */
diff --git a/src/engine/platform/abstract.cpp b/src/engine/platform/abstract.cpp
index 8b3239f0..9b5c377c 100644
--- a/src/engine/platform/abstract.cpp
+++ b/src/engine/platform/abstract.cpp
@@ -156,6 +156,10 @@ size_t DivDispatch::getSampleMemUsage(int index) {
   return 0;
 }
 
+bool DivDispatch::isSampleLoaded(int index, int sample) {
+  return false;
+}
+
 void DivDispatch::renderSamples() {
   
 }
diff --git a/src/engine/platform/msm6258.cpp b/src/engine/platform/msm6258.cpp
index 17e88ae6..a5e0192f 100644
--- a/src/engine/platform/msm6258.cpp
+++ b/src/engine/platform/msm6258.cpp
@@ -362,6 +362,12 @@ size_t DivPlatformMSM6258::getSampleMemUsage(int index) {
   return index == 0 ? adpcmMemLen : 0;
 }
 
+bool DivPlatformMSM6258::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformMSM6258::renderSamples() {
   memset(adpcmMem,0,getSampleMemCapacity(0));
 
diff --git a/src/engine/platform/msm6258.h b/src/engine/platform/msm6258.h
index 02ec7e14..d4d10cf0 100644
--- a/src/engine/platform/msm6258.h
+++ b/src/engine/platform/msm6258.h
@@ -81,6 +81,7 @@ class DivPlatformMSM6258: public DivDispatch {
 
     unsigned char* adpcmMem;
     size_t adpcmMemLen;
+    bool sampleLoaded[256];
     unsigned char sampleBank, msmPan, msmDivider, rateSel, msmClock, clockSel;
     signed char msmDividerCount, msmClockCount;
     short msmOut;
@@ -113,6 +114,7 @@ class DivPlatformMSM6258: public DivDispatch {
     const void* getSampleMem(int index);
     size_t getSampleMemCapacity(int index);
     size_t getSampleMemUsage(int index);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
diff --git a/src/engine/platform/msm6295.cpp b/src/engine/platform/msm6295.cpp
index d46a9bb6..3c590e1b 100644
--- a/src/engine/platform/msm6295.cpp
+++ b/src/engine/platform/msm6295.cpp
@@ -335,6 +335,12 @@ size_t DivPlatformMSM6295::getSampleMemUsage(int index) {
   return index == 0 ? adpcmMemLen : 0;
 }
 
+bool DivPlatformMSM6295::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformMSM6295::renderSamples() {
   unsigned int sampleOffVOX[256];
 
diff --git a/src/engine/platform/msm6295.h b/src/engine/platform/msm6295.h
index 40d35757..c9aecbb2 100644
--- a/src/engine/platform/msm6295.h
+++ b/src/engine/platform/msm6295.h
@@ -68,6 +68,7 @@ class DivPlatformMSM6295: public DivDispatch, public vgsound_emu_mem_intf {
 
     unsigned char* adpcmMem;
     size_t adpcmMemLen;
+    bool sampleLoaded[256];
     unsigned char sampleBank;
 
     int delay, updateOsc;
@@ -101,6 +102,7 @@ class DivPlatformMSM6295: public DivDispatch, public vgsound_emu_mem_intf {
     virtual const void* getSampleMem(int index) override;
     virtual size_t getSampleMemCapacity(int index) override;
     virtual size_t getSampleMemUsage(int index) override;
+    virtual bool isSampleLoaded(int index, int sample) override;
     virtual void renderSamples() override;
 
     virtual int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags) override;
diff --git a/src/engine/platform/nes.cpp b/src/engine/platform/nes.cpp
index 47d81573..4ed958f3 100644
--- a/src/engine/platform/nes.cpp
+++ b/src/engine/platform/nes.cpp
@@ -721,6 +721,12 @@ size_t DivPlatformNES::getSampleMemUsage(int index) {
   return index==0?dpcmMemLen:0;
 }
 
+bool DivPlatformNES::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformNES::renderSamples() {
   memset(dpcmMem,0,getSampleMemCapacity(0));
 
diff --git a/src/engine/platform/nes.h b/src/engine/platform/nes.h
index 16f52f20..d3965a1e 100644
--- a/src/engine/platform/nes.h
+++ b/src/engine/platform/nes.h
@@ -68,6 +68,7 @@ class DivPlatformNES: public DivDispatch {
   int dacSample;
   unsigned char* dpcmMem;
   size_t dpcmMemLen;
+  bool sampleLoaded[256];
   unsigned char dpcmBank;
   unsigned char sampleBank;
   unsigned char writeOscBuf;
@@ -115,6 +116,7 @@ class DivPlatformNES: public DivDispatch {
     const void* getSampleMem(int index);
     size_t getSampleMemCapacity(int index);
     size_t getSampleMemUsage(int index);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     void quit();
diff --git a/src/engine/platform/opl.cpp b/src/engine/platform/opl.cpp
index e7152bca..b4446657 100644
--- a/src/engine/platform/opl.cpp
+++ b/src/engine/platform/opl.cpp
@@ -1757,6 +1757,12 @@ size_t DivPlatformOPL::getSampleMemUsage(int index) {
   return (index==0 && adpcmChan>=0) ? adpcmBMemLen : 0;
 }
 
+bool DivPlatformOPL::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformOPL::renderSamples() {
   if (adpcmChan<0) return;
   memset(adpcmBMem,0,getSampleMemCapacity(0));
diff --git a/src/engine/platform/opl.h b/src/engine/platform/opl.h
index 8fe8cb25..3eb1da77 100644
--- a/src/engine/platform/opl.h
+++ b/src/engine/platform/opl.h
@@ -91,6 +91,7 @@ class DivPlatformOPL: public DivDispatch {
     size_t adpcmBMemLen;
     DivOPLAInterface iface;
     unsigned int sampleOffB[256];
+    bool sampleLoaded[256];
   
     ymfm::adpcm_b_engine* adpcmB;
     const unsigned char** slotsNonDrums;
@@ -152,6 +153,7 @@ class DivPlatformOPL: public DivDispatch {
     const void* getSampleMem(int index);
     size_t getSampleMemCapacity(int index);
     size_t getSampleMemUsage(int index);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     void quit();
diff --git a/src/engine/platform/qsound.cpp b/src/engine/platform/qsound.cpp
index 31525528..97cf3f39 100644
--- a/src/engine/platform/qsound.cpp
+++ b/src/engine/platform/qsound.cpp
@@ -644,6 +644,12 @@ size_t DivPlatformQSound::getSampleMemUsage(int index) {
   return index == 0 ? sampleMemLen : 0;
 }
 
+bool DivPlatformQSound::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 // TODO: ADPCM... come on...
 void DivPlatformQSound::renderSamples() {
   memset(sampleMem,0,getSampleMemCapacity());
diff --git a/src/engine/platform/qsound.h b/src/engine/platform/qsound.h
index 89488627..d092d4d9 100644
--- a/src/engine/platform/qsound.h
+++ b/src/engine/platform/qsound.h
@@ -69,6 +69,7 @@ class DivPlatformQSound: public DivDispatch {
 
   unsigned char* sampleMem;
   size_t sampleMemLen;
+  bool sampleLoaded[256];
   struct qsound_chip chip;
   unsigned short regPool[512];
 
@@ -103,6 +104,7 @@ class DivPlatformQSound: public DivDispatch {
     const void* getSampleMem(int index = 0);
     size_t getSampleMemCapacity(int index = 0);
     size_t getSampleMemUsage(int index = 0);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     void quit();
diff --git a/src/engine/platform/rf5c68.cpp b/src/engine/platform/rf5c68.cpp
index d0786896..eec62f5b 100644
--- a/src/engine/platform/rf5c68.cpp
+++ b/src/engine/platform/rf5c68.cpp
@@ -385,6 +385,12 @@ size_t DivPlatformRF5C68::getSampleMemUsage(int index) {
   return index == 0 ? sampleMemLen : 0;
 }
 
+bool DivPlatformRF5C68::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformRF5C68::renderSamples() {
   memset(sampleMem,0,getSampleMemCapacity());
   memset(sampleOffRFC,0,256*sizeof(unsigned int));
diff --git a/src/engine/platform/rf5c68.h b/src/engine/platform/rf5c68.h
index 4c64c2d6..84cb6867 100644
--- a/src/engine/platform/rf5c68.h
+++ b/src/engine/platform/rf5c68.h
@@ -67,6 +67,7 @@ class DivPlatformRF5C68: public DivDispatch {
   int chipType;
   unsigned char curChan;
   unsigned int sampleOffRFC[256];
+  bool sampleLoaded[256];
 
   unsigned char* sampleMem;
   size_t sampleMemLen;
@@ -99,6 +100,7 @@ class DivPlatformRF5C68: public DivDispatch {
     const void* getSampleMem(int index = 0);
     size_t getSampleMemCapacity(int index = 0);
     size_t getSampleMemUsage(int index = 0);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     void quit();
diff --git a/src/engine/platform/snes.cpp b/src/engine/platform/snes.cpp
index f7790e42..8ab24dda 100644
--- a/src/engine/platform/snes.cpp
+++ b/src/engine/platform/snes.cpp
@@ -797,6 +797,12 @@ size_t DivPlatformSNES::getSampleMemUsage(int index) {
   return index == 0 ? sampleMemLen : 0;
 }
 
+bool DivPlatformSNES::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformSNES::renderSamples() {
   memset(copyOfSampleMem,0,getSampleMemCapacity());
   memset(sampleOff,0,256*sizeof(unsigned int));
diff --git a/src/engine/platform/snes.h b/src/engine/platform/snes.h
index a21db150..ad3b0ab2 100644
--- a/src/engine/platform/snes.h
+++ b/src/engine/platform/snes.h
@@ -109,6 +109,7 @@ class DivPlatformSNES: public DivDispatch {
   signed char copyOfSampleMem[65536];
   size_t sampleMemLen;
   unsigned int sampleOff[256];
+  bool sampleLoaded[256];
   unsigned char regPool[0x80];
   SPC_DSP dsp;
   friend void putDispatchChan(void*,int,int);
@@ -136,6 +137,7 @@ class DivPlatformSNES: public DivDispatch {
     const void* getSampleMem(int index = 0);
     size_t getSampleMemCapacity(int index = 0);
     size_t getSampleMemUsage(int index = 0);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     void quit();
diff --git a/src/engine/platform/su.cpp b/src/engine/platform/su.cpp
index c00847fc..6833eac1 100644
--- a/src/engine/platform/su.cpp
+++ b/src/engine/platform/su.cpp
@@ -547,6 +547,12 @@ size_t DivPlatformSoundUnit::getSampleMemUsage(int index) {
   return (index==0)?sampleMemLen:0;
 }
 
+bool DivPlatformSoundUnit::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformSoundUnit::renderSamples() {
   memset(su->pcm,0,getSampleMemCapacity(0));
   memset(sampleOffSU,0,256*sizeof(unsigned int));
diff --git a/src/engine/platform/su.h b/src/engine/platform/su.h
index 004c04c5..e7eff8d4 100644
--- a/src/engine/platform/su.h
+++ b/src/engine/platform/su.h
@@ -102,6 +102,7 @@ class DivPlatformSoundUnit: public DivDispatch {
   unsigned char initIlCtrl, initIlSize, initFil1;
   signed char echoVol, initEchoVol;
   unsigned int sampleOffSU[256];
+  bool sampleLoaded[256];
 
   int cycles, curChan, delay;
   short tempL;
@@ -138,6 +139,7 @@ class DivPlatformSoundUnit: public DivDispatch {
     const void* getSampleMem(int index);
     size_t getSampleMemCapacity(int index);
     size_t getSampleMemUsage(int index);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
     void quit();
diff --git a/src/engine/platform/x1_010.cpp b/src/engine/platform/x1_010.cpp
index 6f220242..f017d6c3 100644
--- a/src/engine/platform/x1_010.cpp
+++ b/src/engine/platform/x1_010.cpp
@@ -949,6 +949,12 @@ size_t DivPlatformX1_010::getSampleMemUsage(int index) {
   return index >= 0 ? sampleMemLen : 0;
 }
 
+bool DivPlatformX1_010::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformX1_010::renderSamples() {
   memset(sampleMem,0,getSampleMemCapacity());
   memset(sampleOffX1,0,256*sizeof(unsigned int));
diff --git a/src/engine/platform/x1_010.h b/src/engine/platform/x1_010.h
index ff5557bb..e54a3e89 100644
--- a/src/engine/platform/x1_010.h
+++ b/src/engine/platform/x1_010.h
@@ -116,6 +116,7 @@ class DivPlatformX1_010: public DivDispatch, public vgsound_emu_mem_intf {
   bool isBanked=false;
   unsigned int bankSlot[8];
   unsigned int sampleOffX1[256];
+  bool sampleLoaded[256];
 
   unsigned char regPool[0x2000];
   double NoteX1_010(int ch, int note);
@@ -146,6 +147,7 @@ class DivPlatformX1_010: public DivDispatch, public vgsound_emu_mem_intf {
     const void* getSampleMem(int index = 0);
     size_t getSampleMemCapacity(int index = 0);
     size_t getSampleMemUsage(int index = 0);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     const char** getRegisterSheet();
     void setBanked(bool banked);
diff --git a/src/engine/platform/ym2608.cpp b/src/engine/platform/ym2608.cpp
index a58bad8d..2995c6da 100644
--- a/src/engine/platform/ym2608.cpp
+++ b/src/engine/platform/ym2608.cpp
@@ -1336,6 +1336,12 @@ size_t DivPlatformYM2608::getSampleMemUsage(int index) {
   return index == 0 ? adpcmBMemLen : 0;
 }
 
+bool DivPlatformYM2608::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformYM2608::renderSamples() {
   memset(adpcmBMem,0,getSampleMemCapacity(0));
   memset(sampleOffB,0,256*sizeof(unsigned int));
diff --git a/src/engine/platform/ym2608.h b/src/engine/platform/ym2608.h
index f4c101c2..81a6844d 100644
--- a/src/engine/platform/ym2608.h
+++ b/src/engine/platform/ym2608.h
@@ -100,6 +100,7 @@ class DivPlatformYM2608: public DivPlatformOPN {
     size_t adpcmBMemLen;
     DivYM2608Interface iface;
     unsigned int sampleOffB[256];
+    bool sampleLoaded[256];
   
     DivPlatformAY8910* ay;
     unsigned char sampleBank;
@@ -137,6 +138,7 @@ class DivPlatformYM2608: public DivPlatformOPN {
     const void* getSampleMem(int index);
     size_t getSampleMemCapacity(int index);
     size_t getSampleMemUsage(int index);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     void setFlags(const DivConfig& flags);
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
diff --git a/src/engine/platform/ym2610shared.h b/src/engine/platform/ym2610shared.h
index 4b69920c..6dd3bbba 100644
--- a/src/engine/platform/ym2610shared.h
+++ b/src/engine/platform/ym2610shared.h
@@ -142,6 +142,8 @@ template<int ChanNum> class DivPlatformYM2610Base: public DivPlatformOPN {
     unsigned char sampleBank;
   
     bool extMode, noExtMacros;
+
+    bool sampleLoaded[2][256];
   
     unsigned char writeADPCMAOff, writeADPCMAOn;
     int globalADPCMAVolume;
@@ -208,10 +210,17 @@ template<int ChanNum> class DivPlatformYM2610Base: public DivPlatformOPN {
       return index == 0 ? adpcmAMemLen : index == 1 ? adpcmBMemLen : 0;
     }
 
+    bool isSampleLoaded(int index, int sample) {
+      if (index<0 || index>1) return false;
+      if (sample<0 || sample>255) return false;
+      return sampleLoaded[index][sample];
+    }
+
     void renderSamples() {
       memset(adpcmAMem,0,getSampleMemCapacity(0));
       memset(sampleOffA,0,256*sizeof(unsigned int));
       memset(sampleOffB,0,256*sizeof(unsigned int));
+      memset(sampleLoaded,0,256*2*sizeof(bool));
 
       size_t memPos=0;
       for (int i=0; i<parent->song.sampleLen; i++) {
@@ -231,6 +240,7 @@ template<int ChanNum> class DivPlatformYM2610Base: public DivPlatformOPN {
           memcpy(adpcmAMem+memPos,s->dataA,paddedLen);
         }
         sampleOffA[i]=memPos;
+        sampleLoaded[0][i]=true;
         memPos+=paddedLen;
       }
       adpcmAMemLen=memPos+256;
@@ -255,6 +265,7 @@ template<int ChanNum> class DivPlatformYM2610Base: public DivPlatformOPN {
           memcpy(adpcmBMem+memPos,s->dataB,paddedLen);
         }
         sampleOffB[i]=memPos;
+        sampleLoaded[1][i]=true;
         memPos+=paddedLen;
       }
       adpcmBMemLen=memPos+256;
diff --git a/src/engine/platform/ymz280b.cpp b/src/engine/platform/ymz280b.cpp
index 5ad8a0ed..91d63e3b 100644
--- a/src/engine/platform/ymz280b.cpp
+++ b/src/engine/platform/ymz280b.cpp
@@ -420,6 +420,12 @@ size_t DivPlatformYMZ280B::getSampleMemUsage(int index) {
   return index == 0 ? sampleMemLen : 0;
 }
 
+bool DivPlatformYMZ280B::isSampleLoaded(int index, int sample) {
+  if (index!=0) return false;
+  if (sample<0 || sample>255) return false;
+  return sampleLoaded[sample];
+}
+
 void DivPlatformYMZ280B::renderSamples() {
   memset(sampleMem,0,getSampleMemCapacity());
   memset(sampleOff,0,256*sizeof(unsigned int));
diff --git a/src/engine/platform/ymz280b.h b/src/engine/platform/ymz280b.h
index 3b4b60d5..7e8ceb67 100644
--- a/src/engine/platform/ymz280b.h
+++ b/src/engine/platform/ymz280b.h
@@ -67,6 +67,7 @@ class DivPlatformYMZ280B: public DivDispatch {
   bool isMuted[8];
   int chipType;
   unsigned int sampleOff[256];
+  bool sampleLoaded[256];
 
   unsigned char* sampleMem;
   size_t sampleMemLen;
@@ -99,6 +100,7 @@ class DivPlatformYMZ280B: public DivDispatch {
     const void* getSampleMem(int index = 0);
     size_t getSampleMemCapacity(int index = 0);
     size_t getSampleMemUsage(int index = 0);
+    bool isSampleLoaded(int index, int sample);
     void renderSamples();
     void setFlags(const DivConfig& flags);
     int init(DivEngine* parent, int channels, int sugRate, const DivConfig& flags);
diff --git a/src/gui/gui.h b/src/gui/gui.h
index 80e9909f..a371789f 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -227,6 +227,13 @@ enum FurnaceGUIColors {
   GUI_COLOR_SAMPLE_SEL,
   GUI_COLOR_SAMPLE_SEL_POINT,
   GUI_COLOR_SAMPLE_NEEDLE,
+  GUI_COLOR_SAMPLE_NEEDLE_PLAYING,
+  GUI_COLOR_SAMPLE_LOOP_POINT,
+  GUI_COLOR_SAMPLE_TIME_BG,
+  GUI_COLOR_SAMPLE_TIME_FG,
+  GUI_COLOR_SAMPLE_CHIP_DISABLED,
+  GUI_COLOR_SAMPLE_CHIP_ENABLED,
+  GUI_COLOR_SAMPLE_CHIP_WARNING,
 
   GUI_COLOR_PAT_MANAGER_NULL,
   GUI_COLOR_PAT_MANAGER_USED,
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index b542b3f7..07716653 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -860,6 +860,13 @@ const FurnaceGUIColorDef guiColors[GUI_COLOR_MAX]={
   D(GUI_COLOR_SAMPLE_SEL,"",ImVec4(0.26f,0.59f,0.98f,0.25f)),
   D(GUI_COLOR_SAMPLE_SEL_POINT,"",ImVec4(0.06f,0.53f,0.98f,0.5f)),
   D(GUI_COLOR_SAMPLE_NEEDLE,"",ImVec4(1.0f,0.8f,0.0f,1.0f)),
+  D(GUI_COLOR_SAMPLE_NEEDLE_PLAYING,"",ImVec4(0.2f,1.0f,0.0f,1.0f)),
+  D(GUI_COLOR_SAMPLE_LOOP_POINT,"",ImVec4(1.0f,0.0f,0.0f,1.0f)),
+  D(GUI_COLOR_SAMPLE_TIME_BG,"",ImVec4(0.1f,0.11f,0.12f,1.0f)),
+  D(GUI_COLOR_SAMPLE_TIME_FG,"",ImVec4(0.4f,0.4f,0.4f,1.0f)),
+  D(GUI_COLOR_SAMPLE_CHIP_DISABLED,"",ImVec4(0.6f,0.6f,0.6f,1.0f)),
+  D(GUI_COLOR_SAMPLE_CHIP_ENABLED,"",ImVec4(0.3f,1.0f,0.3f,1.0f)),
+  D(GUI_COLOR_SAMPLE_CHIP_WARNING,"",ImVec4(1.0f,0.75f,0.3f,1.0f)),
 
   D(GUI_COLOR_PAT_MANAGER_NULL,"",ImVec4(0.15f,0.15f,0.15f,1.0f)),
   D(GUI_COLOR_PAT_MANAGER_USED,"",ImVec4(0.15f,1.0f,0.15f,1.0f)),
diff --git a/src/gui/sampleEdit.cpp b/src/gui/sampleEdit.cpp
index 9f692c77..676481f6 100644
--- a/src/gui/sampleEdit.cpp
+++ b/src/gui/sampleEdit.cpp
@@ -277,6 +277,7 @@ void FurnaceGUI::drawSampleEdit() {
           bool isChipVisible[32];
           bool isTypeVisible[4];
           bool isMemVisible[4][32];
+          bool isMemWarning[4][32];
           memset(isChipVisible,0,32*sizeof(bool));
           memset(isTypeVisible,0,4*sizeof(bool));
           memset(isMemVisible,0,32*4*sizeof(bool));
@@ -289,6 +290,7 @@ void FurnaceGUI::drawSampleEdit() {
               isChipVisible[i]=true;
               isTypeVisible[j]=true;
               isMemVisible[j][i]=true;
+              if (!dispatch->isSampleLoaded(j,curSample)) isMemWarning[j][i]=true;
             }
           }
           int selColumns=1;
@@ -319,9 +321,41 @@ void FurnaceGUI::drawSampleEdit() {
 
                   if (!isMemVisible[i][j]) continue;
                   snprintf(id,1023,"##_SEC%d_%d",i,j);
+
+                  ImVec4 baseColor=sample->renderOn[i][j]?(isMemWarning[i][j]?uiColors[GUI_COLOR_SAMPLE_CHIP_WARNING]:uiColors[GUI_COLOR_SAMPLE_CHIP_ENABLED]):uiColors[GUI_COLOR_SAMPLE_CHIP_DISABLED];
+                  ImVec4 color=baseColor;
+                  ImVec4 colorHovered=baseColor;
+                  ImVec4 colorActive=baseColor;
+
+                  if (settings.guiColorsBase) {
+                    color.x*=0.8f;
+                    color.y*=0.8f;
+                    color.z*=0.8f;
+                    colorHovered.x*=0.65f;
+                    colorHovered.y*=0.65f;
+                    colorHovered.z*=0.65f;
+                    colorActive.x*=0.3f;
+                    colorActive.y*=0.3f;
+                    colorActive.z*=0.3f;
+                  } else {
+                    color.x*=0.2f;
+                    color.y*=0.2f;
+                    color.z*=0.2f;
+                    colorHovered.x*=0.4f;
+                    colorHovered.y*=0.4f;
+                    colorHovered.z*=0.4f;
+                  }
+
+                  ImGui::PushStyleColor(ImGuiCol_FrameBg,color);
+                  ImGui::PushStyleColor(ImGuiCol_FrameBgHovered,colorHovered);
+                  ImGui::PushStyleColor(ImGuiCol_FrameBgActive,colorActive);
+                  ImGui::PushStyleColor(ImGuiCol_CheckMark,baseColor);
+
                   if (ImGui::Checkbox(id,&sample->renderOn[i][j])) {
                     e->renderSamplesP();
                   }
+
+                  ImGui::PopStyleColor(4);
                 }
               }
               ImGui::EndTable();
diff --git a/src/gui/settings.cpp b/src/gui/settings.cpp
index 1fae2792..90ce5bff 100644
--- a/src/gui/settings.cpp
+++ b/src/gui/settings.cpp
@@ -1843,12 +1843,19 @@ void FurnaceGUI::drawSettings() {
             if (ImGui::TreeNode("Sample Editor")) {
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_BG,"Background");
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_FG,"Waveform");
+              UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_TIME_BG,"Time background");
+              UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_TIME_FG,"Time text");
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_LOOP,"Loop region");
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_CENTER,"Center guide");
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_GRID,"Grid");
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_SEL,"Selection");
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_SEL_POINT,"Selection points");
               UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_NEEDLE,"Preview needle");
+              UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_NEEDLE_PLAYING,"Playing needles");
+              UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_LOOP_POINT,"Loop markers");
+              UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_CHIP_DISABLED,"Chip select: disabled");
+              UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_CHIP_ENABLED,"Chip select: enabled");
+              UI_COLOR_CONFIG(GUI_COLOR_SAMPLE_CHIP_WARNING,"Chip select: enabled (failure)");
               ImGui::TreePop();
             }
             if (ImGui::TreeNode("Pattern Manager")) {