diff --git a/src/engine/engine.h b/src/engine/engine.h
index 00789b916..ace57ec76 100644
--- a/src/engine/engine.h
+++ b/src/engine/engine.h
@@ -98,8 +98,14 @@ enum DivMIDIModes {
   DIV_MIDI_MODE_LIGHT_SHOW
 };
 
+enum DivAudioExportFormats {
+  DIV_EXPORT_FORMAT_S16=0,
+  DIV_EXPORT_FORMAT_F32
+};
+
 struct DivAudioExportOptions {
   DivAudioExportModes mode;
+  DivAudioExportFormats format;
   int sampleRate;
   int chans;
   int loops;
@@ -108,6 +114,7 @@ struct DivAudioExportOptions {
   bool channelMask[DIV_MAX_CHANS];
   DivAudioExportOptions():
     mode(DIV_EXPORT_MODE_ONE),
+    format(DIV_EXPORT_FORMAT_S16),
     sampleRate(44100),
     chans(2),
     loops(0),
@@ -478,8 +485,10 @@ class DivEngine {
   DivChannelState chan[DIV_MAX_CHANS];
   DivAudioEngines audioEngine;
   DivAudioExportModes exportMode;
+  DivAudioExportFormats exportFormat;
   double exportFadeOut;
   int exportOutputs;
+  bool exportChannelMask[DIV_MAX_CHANS];
   DivConfig conf;
   FixedQueue<DivNoteEvent,8192> pendingNotes;
   // bitfield
@@ -1382,6 +1391,7 @@ class DivEngine {
       haltOn(DIV_HALT_NONE),
       audioEngine(DIV_AUDIO_NULL),
       exportMode(DIV_EXPORT_MODE_ONE),
+      exportFormat(DIV_EXPORT_FORMAT_S16),
       exportFadeOut(0.0),
       exportOutputs(2),
       cmdStreamInt(NULL),
@@ -1435,6 +1445,7 @@ class DivEngine {
       memset(sysDefs,0,DIV_MAX_CHIP_DEFS*sizeof(void*));
       memset(walked,0,8192);
       memset(oscBuf,0,DIV_MAX_OUTPUTS*(sizeof(float*)));
+      memset(exportChannelMask,1,DIV_MAX_CHANS*sizeof(bool));
 
       for (int i=0; i<DIV_MAX_CHIP_DEFS; i++) {
         sysFileMapFur[i]=DIV_SYSTEM_NULL;
diff --git a/src/engine/wavOps.cpp b/src/engine/wavOps.cpp
index f904994ac..001e3a3e7 100644
--- a/src/engine/wavOps.cpp
+++ b/src/engine/wavOps.cpp
@@ -46,7 +46,11 @@ void DivEngine::runExportThread() {
       SFWrapper sfWrap;
       si.samplerate=got.rate;
       si.channels=exportOutputs;
-      si.format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
+      if (exportFormat==DIV_EXPORT_FORMAT_S16) {
+        si.format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
+      } else {
+        si.format=SF_FORMAT_WAV|SF_FORMAT_FLOAT;
+      }
 
       sf=sfWrap.doOpen(exportPath.c_str(),SFM_WRITE,&si);
       if (sf==NULL) {
@@ -253,6 +257,7 @@ void DivEngine::runExportThread() {
       logI("rendering to files...");
       
       for (int i=0; i<chans; i++) {
+        if (!exportChannelMask[i]) continue;
         SNDFILE* sf;
         SF_INFO si;
         SFWrapper sfWrap;
@@ -260,7 +265,11 @@ void DivEngine::runExportThread() {
         logI("- %s",fname.c_str());
         si.samplerate=got.rate;
         si.channels=exportOutputs;
-        si.format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
+        if (exportFormat==DIV_EXPORT_FORMAT_S16) {
+          si.format=SF_FORMAT_WAV|SF_FORMAT_PCM_16;
+        } else {
+          si.format=SF_FORMAT_WAV|SF_FORMAT_FLOAT;
+        }
 
         sf=sfWrap.doOpen(fname.c_str(),SFM_WRITE,&si);
         if (sf==NULL) {
@@ -391,7 +400,9 @@ bool DivEngine::saveAudio(const char* path, DivAudioExportOptions options) {
 #else
   exportPath=path;
   exportMode=options.mode;
+  exportFormat=options.format;
   exportFadeOut=options.fadeOut;
+  memcpy(exportChannelMask,options.channelMask,DIV_MAX_CHANS*sizeof(bool));
   if (exportMode!=DIV_EXPORT_MODE_ONE) {
     // remove extension
     String lowerCase=exportPath;
diff --git a/src/gui/exportOptions.cpp b/src/gui/exportOptions.cpp
index f65f38330..47747465b 100644
--- a/src/gui/exportOptions.cpp
+++ b/src/gui/exportOptions.cpp
@@ -34,12 +34,24 @@ void FurnaceGUI::drawExportAudio(bool onWindow) {
   }
   if (ImGui::RadioButton("multiple files (one per chip)",audioExportOptions.mode==DIV_EXPORT_MODE_MANY_SYS)) {
     audioExportOptions.mode=DIV_EXPORT_MODE_MANY_SYS;
-  }
+        }
   if (ImGui::RadioButton("multiple files (one per channel)",audioExportOptions.mode==DIV_EXPORT_MODE_MANY_CHAN)) {
     audioExportOptions.mode=DIV_EXPORT_MODE_MANY_CHAN;
   }
   ImGui::Unindent();
 
+  if (audioExportOptions.mode!=DIV_EXPORT_MODE_MANY_SYS) {
+    ImGui::Text("Bit depth:");
+    ImGui::Indent();
+    if (ImGui::RadioButton("16-bit integer",audioExportOptions.format==DIV_EXPORT_FORMAT_S16)) {
+      audioExportOptions.format=DIV_EXPORT_FORMAT_S16;
+    }
+    if (ImGui::RadioButton("32-bit float",audioExportOptions.format==DIV_EXPORT_FORMAT_F32)) {
+      audioExportOptions.format=DIV_EXPORT_FORMAT_F32;
+    }
+    ImGui::Unindent();
+  }
+
   if (ImGui::InputInt("Sample rate",&audioExportOptions.sampleRate,100,10000)) {
     if (audioExportOptions.sampleRate<8000) audioExportOptions.sampleRate=8000;
     if (audioExportOptions.sampleRate>384000) audioExportOptions.sampleRate=384000;
@@ -59,25 +71,63 @@ void FurnaceGUI::drawExportAudio(bool onWindow) {
     if (audioExportOptions.fadeOut<0.0) audioExportOptions.fadeOut=0.0;
   }
 
+  bool isOneOn=false;
+  if (audioExportOptions.mode==DIV_EXPORT_MODE_MANY_CHAN) {
+    ImGui::Text("Channels to export:");
+    ImGui::SameLine();
+    if (ImGui::SmallButton("All")) {
+      for (int i=0; i<DIV_MAX_CHANS; i++) {
+        audioExportOptions.channelMask[i]=true;
+      }
+    }
+    ImGui::SameLine();
+    if (ImGui::SmallButton("None")) {
+      for (int i=0; i<DIV_MAX_CHANS; i++) {
+        audioExportOptions.channelMask[i]=false;
+      }
+    }
+    ImGui::SameLine();
+    if (ImGui::SmallButton("Invert")) {
+      for (int i=0; i<DIV_MAX_CHANS; i++) {
+        audioExportOptions.channelMask[i]=!audioExportOptions.channelMask[i];
+      }
+    }
+
+    if (ImGui::BeginChild("Channel Selection",ImVec2(0,200.0f*dpiScale))) {
+      for (int i=0; i<e->getTotalChannelCount(); i++) {
+        String name=fmt::sprintf("%d. %s##_CE%d",i+1,e->getChannelName(i),i);
+        ImGui::Checkbox(name.c_str(),&audioExportOptions.channelMask[i]);
+        if (audioExportOptions.channelMask[i]) isOneOn=true;
+      }
+    }
+    ImGui::EndChild();
+  } else {
+    isOneOn=true;
+  }
+
   if (onWindow) {
     ImGui::Separator();
     if (ImGui::Button("Cancel",ImVec2(200.0f*dpiScale,0))) ImGui::CloseCurrentPopup();
     ImGui::SameLine();
   }
 
-  if (ImGui::Button("Export",ImVec2(200.0f*dpiScale,0))) {
-    switch (audioExportOptions.mode) {
-      case DIV_EXPORT_MODE_ONE:
-        openFileDialog(GUI_FILE_EXPORT_AUDIO_ONE);
-        break;
-      case DIV_EXPORT_MODE_MANY_SYS:
-        openFileDialog(GUI_FILE_EXPORT_AUDIO_PER_SYS);
-        break;
-      case DIV_EXPORT_MODE_MANY_CHAN:
-        openFileDialog(GUI_FILE_EXPORT_AUDIO_PER_CHANNEL);
-        break;
+  if (isOneOn) {
+    if (ImGui::Button("Export",ImVec2(200.0f*dpiScale,0))) {
+      switch (audioExportOptions.mode) {
+        case DIV_EXPORT_MODE_ONE:
+          openFileDialog(GUI_FILE_EXPORT_AUDIO_ONE);
+          break;
+        case DIV_EXPORT_MODE_MANY_SYS:
+          openFileDialog(GUI_FILE_EXPORT_AUDIO_PER_SYS);
+          break;
+        case DIV_EXPORT_MODE_MANY_CHAN:
+          openFileDialog(GUI_FILE_EXPORT_AUDIO_PER_CHANNEL);
+          break;
+      }
+      ImGui::CloseCurrentPopup();
     }
-    ImGui::CloseCurrentPopup();
+  } else {
+    ImGui::Text("select at least one channel");
   }
 }