diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index af22075..3440f12 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -142,9 +142,11 @@ bool JuceOplvstiAudioProcessor::isRecording() {
 
 void JuceOplvstiAudioProcessor::startRecording(File *outputFile) {
 	recordingFile = outputFile;
+	Opl->StartCapture(outputFile->getFullPathName().toUTF8());
 }
 
 void JuceOplvstiAudioProcessor::stopRecording() {
+	Opl->StopCapture();
 	recordingFile = NULL;
 }
 
diff --git a/Source/drov1.cpp b/Source/drov1.cpp
new file mode 100644
index 0000000..3ba1aaa
--- /dev/null
+++ b/Source/drov1.cpp
@@ -0,0 +1,213 @@
+#include "JuceHeader.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "drov1.h"
+
+// http://sourceforge.net/p/dosbox/code-0/HEAD/tree/dosbox/tags/RELEASE_0_72/src/hardware/adlib.cpp#l196
+
+// from mem.h
+typedef Bit8u * HostPt;
+#if defined(WORDS_BIGENDIAN) || !defined(C_UNALIGNED_MEMORY)
+
+INLINE Bit8u host_readb(HostPt off) {
+	return off[0];
+};
+INLINE Bit16u host_readw(HostPt off) {
+	return off[0] | (off[1] << 8);
+};
+INLINE Bit32u host_readd(HostPt off) {
+	return off[0] | (off[1] << 8) | (off[2] << 16) | (off[3] << 24);
+};
+INLINE void host_writeb(HostPt off,Bit8u val) {
+	off[0]=val;
+};
+INLINE void host_writew(HostPt off,Bit16u val) {
+	off[0]=(Bit8u)(val);
+	off[1]=(Bit8u)(val >> 8);
+};
+INLINE void host_writed(HostPt off,Bit32u val) {
+	off[0]=(Bit8u)(val);
+	off[1]=(Bit8u)(val >> 8);
+	off[2]=(Bit8u)(val >> 16);
+	off[3]=(Bit8u)(val >> 24);
+};
+
+#else
+
+INLINE Bit8u host_readb(HostPt off) {
+	return *(Bit8u *)off;
+};
+INLINE Bit16u host_readw(HostPt off) {
+	return *(Bit16u *)off;
+};
+INLINE Bit32u host_readd(HostPt off) {
+	return *(Bit32u *)off;
+};
+INLINE void host_writeb(HostPt off,Bit8u val) {
+	*(Bit8u *)(off)=val;
+};
+INLINE void host_writew(HostPt off,Bit16u val) {
+	*(Bit16u *)(off)=val;
+};
+INLINE void host_writed(HostPt off,Bit32u val) {
+	*(Bit32u *)(off)=val;
+};
+
+#endif
+
+#define RAW_SIZE 1024
+static struct {
+	struct {
+		FILE * handle;
+		bool capturing;
+		Bit64s start;
+		Bit64s last;
+		Bit8u index;
+		Bit8u buffer[RAW_SIZE+8];
+		Bit8u regs[2][256];
+		Bit32u used;
+		Bit32u done;
+		Bit8u cmd[2];
+		bool opl3;
+		bool dualopl2;
+	} raw;
+} opl;
+
+static void OPL_RawAdd(Bitu index,Bitu val);
+
+static Bit8u dro_header[]={
+	'D','B','R','A',		/* 0x00, Bit32u ID */
+	'W','O','P','L',		/* 0x04, Bit32u ID */
+	0x0,0x00,				/* 0x08, Bit16u version low */
+	0x1,0x00,				/* 0x09, Bit16u version high */
+	0x0,0x0,0x0,0x0,		/* 0x0c, Bit32u total milliseconds */
+	0x0,0x0,0x0,0x0,		/* 0x10, Bit32u total data */
+	0x0,0x0,0x0,0x0			/* 0x14, Bit32u Type 0=opl2,1=opl3,2=dual-opl2 */
+};
+/* Commands 
+	0x00 Bit8u, millisecond delay+1
+	0x02 none, Use the low index/data pair
+	0x03 none, Use the high index/data pair
+	0x10 Bit16u, millisecond delay+1
+	0xxx Bit8u, send command and data to current index/data pair
+*/ 
+
+static void OPL_RawEmptyBuffer(void) {
+	fwrite(opl.raw.buffer,1,opl.raw.used,opl.raw.handle);
+	opl.raw.done+=opl.raw.used;
+	opl.raw.used=0;
+}
+
+#define ADDBUF(_VAL_) opl.raw.buffer[opl.raw.used++]=_VAL_;
+void OPL_CaptureReg(Bitu reg, Bitu val) { if (opl.raw.capturing) {
+	/* Check if we have yet to start */
+	if (!opl.raw.handle) {
+		if (reg<0xb0 || reg>0xb8) return;
+		if (!(val&0x20))  return;
+		Bitu i;
+		Bit64s t = Time::currentTimeMillis();
+		opl.raw.last=t;
+		opl.raw.start=t;
+		opl.raw.handle=fopen("c:\\temp\\cap.dro", "wb");
+		if (!opl.raw.handle) {
+			opl.raw.capturing=false;		
+			return;
+		}
+		memset(opl.raw.buffer,0,sizeof(opl.raw.buffer));
+		fwrite(dro_header,1,sizeof(dro_header),opl.raw.handle);
+		/* Check the registers to add */
+		for (i=0;i<256;i++) {
+			if (!opl.raw.regs[0][i]) continue;
+			if (i>=0xb0 && i<=0xb8) continue;
+			ADDBUF((Bit8u)i);
+			ADDBUF(opl.raw.regs[0][i]);
+		}
+		bool donesecond=false;
+		/* Check if we already have an opl3 enable bit logged */
+		if (opl.raw.regs[1][5] & 1)
+			opl.raw.opl3 = true;
+		for (i=0;i<256;i++) {
+			if (!opl.raw.regs[1][i]) continue;
+			if (i>=0xb0 && i<=0xb8) continue;
+			if (!donesecond) {
+				/* Or already have dual opl2 */
+				opl.raw.dualopl2 = true;
+				donesecond=true;
+				ADDBUF(0x3);
+			}
+			ADDBUF((Bit8u)i);
+			ADDBUF(opl.raw.regs[1][i]);
+		}
+		if (donesecond) ADDBUF(0x2);
+	}
+	/* Check if we enable opl3 or access dual opl2 mode */
+	if (cmd == 5 && index && (val & 1)) {
+		opl.raw.opl3 = true;
+	}
+	if (index && val && cmd>=0xb0 && cmd<=0xb8) {
+		opl.raw.dualopl2 = true;
+	}
+	/* Check how much time has passed, Allow an extra 5 milliseconds? */
+	Bit64s t = Time::currentTimeMillis();
+	if (t > (opl.raw.last+5)) {
+		Bitu passed = (Bitu)(t - opl.raw.last);
+		opl.raw.last = t;
+		while (passed) {
+			passed-=1;
+			if (passed<256) {
+				ADDBUF(0x00);					//8bit delay
+				ADDBUF((Bit8u)passed);			//8bit delay
+				passed=0;
+			} else if (passed<0x10000) {
+				ADDBUF(0x01);					//16bit delay
+				ADDBUF((Bit8u)(passed & 0xff));	//lo-byte
+				ADDBUF((Bit8u)(passed >> 8));	//hi-byte
+				passed=0;
+			} else {
+				ADDBUF(0x01);					//16bit delay
+				ADDBUF(0xff);					//lo-byte
+				ADDBUF(0xff);					//hi-byte
+				passed-=0xffff;
+			}
+		}
+	}
+	/* Check if we're still sending to the correct index */
+	if (opl.raw.index != index) {
+		opl.raw.index=(Bit8u)index;
+		ADDBUF(opl.raw.index ? 0x3 : 0x2);
+	}
+	ADDBUF(cmd);
+	ADDBUF((Bit8u)val);
+	if (opl.raw.used>=RAW_SIZE) OPL_RawEmptyBuffer();
+}}
+
+void OPL_ToggleCapture() {
+	/* Check for previously opened file */
+	if (opl.raw.handle) {
+		OPL_RawEmptyBuffer();
+		/* Fill in the header with useful information */
+		host_writed(&dro_header[0x0c],(Bit32u)(opl.raw.last-opl.raw.start));
+		host_writed(&dro_header[0x10],opl.raw.done);
+		if (opl.raw.opl3 && opl.raw.dualopl2) host_writed(&dro_header[0x14],0x1);
+		else if (opl.raw.dualopl2) host_writed(&dro_header[0x14],0x2);
+		else host_writed(&dro_header[0x14],0x0);
+		fseek(opl.raw.handle,0,0);
+		fwrite(dro_header,1,sizeof(dro_header),opl.raw.handle);
+		fclose(opl.raw.handle);
+		opl.raw.handle=0;
+	}
+	if (opl.raw.capturing) {
+		opl.raw.capturing=false;
+		//LOG_MSG("Stopping Raw OPL capturing.");
+	} else {
+		//LOG_MSG("Preparing to capture Raw OPL, will start with first note played.");
+		opl.raw.capturing=true;
+		opl.raw.index=0;
+		opl.raw.used=0;
+		opl.raw.done=0;
+		opl.raw.start=0;
+		opl.raw.last=0;
+	}
+}
\ No newline at end of file
diff --git a/Source/drov1.h b/Source/drov1.h
new file mode 100644
index 0000000..10fdc65
--- /dev/null
+++ b/Source/drov1.h
@@ -0,0 +1,5 @@
+#include "dosbox.h"
+
+extern void OPL_CaptureReg(Bitu index,Bitu val);
+
+extern void OPL_ToggleCapture();
diff --git a/Source/hiopl.cpp b/Source/hiopl.cpp
index 687b276..4f4f752 100644
--- a/Source/hiopl.cpp
+++ b/Source/hiopl.cpp
@@ -6,6 +6,9 @@
 // A wrapper around the DOSBox and ZDoom OPL emulators.
 
 Hiopl::Hiopl(int buflen, Emulator emulator) {
+	captureHandle = NULL;
+	StopCapture();
+
 	adlib = new DBOPL::Handler();
 	zdoom = JavaOPLCreate(false);
 
@@ -74,6 +77,7 @@ void Hiopl::_WriteReg(Bit32u reg, Bit8u value, Bit8u mask) {
 		zdoom->WriteReg(reg, value);
 	//}
 	regCache[reg] = value;
+	_CaptureRegWriteWithDelay(reg, value);
 }
 
 void Hiopl::_ClearRegBits(Bit32u reg, Bit8u mask) {
@@ -222,6 +226,142 @@ void Hiopl::_milliHertzToFnum(unsigned int milliHertz,
 	return;
 }
 
+static Bit8u dro_header[]={
+	'D','B','R','A',		/* 0x00, Bit32u ID */
+	'W','O','P','L',		/* 0x04, Bit32u ID */
+	0x0,0x00,				/* 0x08, Bit16u version low */
+	0x1,0x00,				/* 0x09, Bit16u version high */
+	0x0,0x0,0x0,0x0,		/* 0x0c, Bit32u total milliseconds */
+	0x0,0x0,0x0,0x0,		/* 0x10, Bit32u total data */
+	0x0,0x0,0x0,0x0			/* 0x14, Bit32u Type 0=opl2,1=opl3,2=dual-opl2 */
+};
+
+static Bit8u dro_opl3_enable[]={
+	0x03,	// switch to extended register bank
+	0x05,	// register 0x105
+	0x01,	// value 0x1
+	0x02	// switch back to regular OPL2 registers
+};
+
+void Hiopl::StartCapture(const char* filepath) {
+	if (NULL != captureHandle) {
+		StopCapture();
+	} else {
+		lastWrite = -1;
+		captureLengthBytes = 0;
+		captureStart = Time::currentTimeMillis();
+		captureHandle = fopen(filepath, "wb");
+		fwrite(dro_header, 1, sizeof(dro_header), captureHandle);
+		for (int i = 0; i <= 0xff; i++) {
+			_CaptureRegWrite(i, 0);
+		}
+		//_CaptureRegWrite(0x1, 0x20);
+		/*
+		for (int ch = 1; ch <= CHANNELS; ch++) {
+			int offset1 = this->_GetOffset(ch, 1);
+			int offset2 = this->_GetOffset(ch, 2);
+			int offset0 = this->_GetOffset(ch);
+			_CaptureRegWrite(0x20 + offset1, regCache[0x20 + offset1]);
+			_CaptureRegWrite(0x20 + offset2, regCache[0x20 + offset2]);
+			_CaptureRegWrite(0x40 + offset1, regCache[0x40 + offset1]);
+			_CaptureRegWrite(0x40 + offset2, regCache[0x40 + offset2]);
+			_CaptureRegWrite(0x60 + offset1, regCache[0x60 + offset1]);
+			_CaptureRegWrite(0x60 + offset2, regCache[0x60 + offset2]);
+			_CaptureRegWrite(0x80 + offset1, regCache[0x80 + offset1]);
+			_CaptureRegWrite(0x80 + offset2, regCache[0x80 + offset2]);
+			_CaptureRegWrite(0xe0 + offset1, regCache[0xe0 + offset1]);
+			_CaptureRegWrite(0xe0 + offset2, regCache[0xe0 + offset2]);
+			_CaptureRegWrite(0xc0 + offset0, regCache[0xc0 + offset0]);
+		}
+		*/
+		_CaptureOpl3Enable();
+		for (Bit8u i = 0x20; i <= 0x35; i++) {
+			_CaptureRegWrite(i, regCache[i]);
+		}
+		for (Bit8u i = 0x40; i <= 0x55; i++) {
+			_CaptureRegWrite(i, regCache[i]);
+		}
+		for (Bit8u i = 0x60; i <= 0x75; i++) {
+			_CaptureRegWrite(i, regCache[i]);
+		}
+		for (Bit8u i = 0x80; i <= 0x95; i++) {
+			_CaptureRegWrite(i, regCache[i]);
+		}
+		_CaptureRegWrite(0xbd, regCache[0xbd]);
+		for (Bit8u i = 0xc0; i <= 0xc8; i++) {
+			_CaptureRegWrite(i, regCache[i] | 0x30);	// enable L + R channels
+		}
+		for (Bit8u i = 0xe0; i <= 0xf5; i++) {
+			_CaptureRegWrite(i, regCache[i]);
+		}
+	}
+}
+
+INLINE void host_writed(Bit8u *off, Bit32u val) {
+	off[0]=(Bit8u)(val);
+	off[1]=(Bit8u)(val >> 8);
+	off[2]=(Bit8u)(val >> 16);
+	off[3]=(Bit8u)(val >> 24);
+};
+
+void Hiopl::StopCapture() {
+	if (NULL != captureHandle) {
+		Bit32u lengthMilliseconds = (Bit32u)(3000 + Time::currentTimeMillis() - captureStart);
+		host_writed(&dro_header[0x0c], lengthMilliseconds);
+		host_writed(&dro_header[0x10], captureLengthBytes);
+		//if (opl.raw.opl3 && opl.raw.dualopl2) host_writed(&dro_header[0x14],0x1);
+		//else if (opl.raw.dualopl2) host_writed(&dro_header[0x14],0x2);
+		//else host_writed(&dro_header[0x14],0x0);
+		host_writed(&dro_header[0x14], 0x1);	// OPL3
+		fseek(captureHandle, 0, 0);
+		fwrite(dro_header, 1, sizeof(dro_header), captureHandle);
+		fclose(captureHandle);
+	}
+	captureHandle = NULL;
+	captureLengthBytes = 0;
+	lastWrite = -1;
+	captureStart = -1;
+}
+
+void Hiopl::_CaptureDelay(Bit16u delayMs) {
+	Bit8u delay[3];
+	delay[0] = 0x01;
+	delay[1] = delayMs & 0xff;
+	delay[2] = (delayMs >> 8) & 0xff;
+	fwrite(delay, 1, 3, captureHandle);
+	captureLengthBytes += 3;
+}
+
+void Hiopl::_CaptureRegWrite(Bit32u reg, Bit8u value) {
+	if (reg <= 0x4) {
+		Bit8u escape = 0x4;
+		fwrite(&escape, 1, 1, captureHandle);
+		captureLengthBytes += 1;
+	}
+	Bit8u regAndVal[2];
+	regAndVal[0] = (Bit8u)reg;
+	regAndVal[1] = value;
+	fwrite(regAndVal, 1, 2, captureHandle);
+	captureLengthBytes += 2;
+}
+
+void Hiopl::_CaptureRegWriteWithDelay(Bit32u reg, Bit8u value) {
+	if (NULL != captureHandle) {
+		Bit64s t = Time::currentTimeMillis();
+		if (lastWrite >= 0) {
+			// Delays of over 65 seconds will be truncated, but that kind of delay is a bit silly anyway..
+			_CaptureDelay((Bit16u)(t - lastWrite));
+		}
+		_CaptureRegWrite(reg, value);
+		lastWrite = t;
+	}
+}
+
+void Hiopl::_CaptureOpl3Enable() {
+	fwrite(dro_opl3_enable, 1, 4, captureHandle);
+	captureLengthBytes += 4;
+}
+
 Hiopl::~Hiopl() {
 
 };
diff --git a/Source/hiopl.h b/Source/hiopl.h
index 60e6142..f0e99b2 100644
--- a/Source/hiopl.h
+++ b/Source/hiopl.h
@@ -57,6 +57,10 @@ class Hiopl {
 		void SetFrequency(int ch, float frqHz, bool keyOn=false);
 		void _WriteReg(Bit32u reg, Bit8u value, Bit8u mask=0x0);
 		void _ClearRegBits(Bit32u reg, Bit8u mask);
+
+		void StartCapture(const char* filepath);
+		void StopCapture();
+
 		~Hiopl();
 	private:
 		Emulator emulator;
@@ -68,6 +72,15 @@ class Hiopl {
 		int _GetOffset(int ch);
 		void _milliHertzToFnum(unsigned int milliHertz, unsigned int *fnum, unsigned int *block, unsigned int conversionFactor=49716);
 		void _ClearRegisters();
+		void _CaptureDelay(Bit16u delayMs);
+		void _CaptureRegWriteWithDelay(Bit32u reg, Bit8u value);
+		void _CaptureRegWrite(Bit32u reg, Bit8u value);
+		void _CaptureOpl3Enable();
 		std::map<int, int> _op1offset;
 		std::map<int, int> _op2offset;
+
+		FILE* captureHandle;
+		Bit64s captureStart;
+		Bit64s lastWrite;
+		Bit32u captureLengthBytes;
 };