diff --git a/Core/HLE/sceAtrac.cpp b/Core/HLE/sceAtrac.cpp
index 7fcfc949d5..db27f22461 100644
--- a/Core/HLE/sceAtrac.cpp
+++ b/Core/HLE/sceAtrac.cpp
@@ -179,20 +179,9 @@ struct AVPacket {
 #endif
 
 struct Atrac {
-	Atrac() : atracID_(-1), dataBuf_(0), decodePos_(0), bufferPos_(0),
-		channels_(0), outputChannels_(2), bitrate_(64), bytesPerFrame_(0), bufferMaxSize_(0), jointStereo_(0),
-		currentSample_(0), endSample_(0), firstSampleOffset_(0), dataOff_(0),
-		loopStartSample_(-1), loopEndSample_(-1), loopNum_(0),
-		failedDecode_(false), ignoreDataBuf_(false), codecType_(0),
-		bufferState_(ATRAC_STATUS_NO_DATA) {
+	Atrac() {
 		memset(&first_, 0, sizeof(first_));
 		memset(&second_, 0, sizeof(second_));
-#ifdef USE_FFMPEG
-		codecCtx_ = nullptr;
-		swrCtx_ = nullptr;
-		frame_ = nullptr;
-		packet_ = nullptr;
-#endif // USE_FFMPEG
 		context_ = 0;
 	}
 
@@ -401,40 +390,40 @@ struct Atrac {
 		return remainingBytes / bytesPerFrame_;
 	}
 
-	int atracID_;
-	u8 *dataBuf_;
+	int atracID_ = -1;
+	u8 *dataBuf_ = nullptr;
 
-	u32 decodePos_;
+	u32 decodePos_ = 0;
 	// Used by low-level decoding and to track streaming.
-	u32 bufferPos_;
-	u32 bufferValidBytes_;
+	u32 bufferPos_ = 0;
+	u32 bufferValidBytes_ = 0;
 	u32 bufferHeaderSize_ = 0;
 
-	u16 channels_;
-	u16 outputChannels_;
-	u32 bitrate_;
-	u16 bytesPerFrame_;
-	u32 bufferMaxSize_;
-	int jointStereo_;
+	u16 channels_ = 0;
+	u16 outputChannels_ = 2;
+	u32 bitrate_ = 64;
+	u16 bytesPerFrame_ = 0;
+	u32 bufferMaxSize_ = 0;
+	int jointStereo_ = 0;
 
-	int currentSample_;
-	int endSample_;
-	int firstSampleOffset_;
+	int currentSample_ = 0;
+	int endSample_ = 0;
+	int firstSampleOffset_ = 0;
 	// Offset of the first sample in the input buffer
-	int dataOff_;
+	int dataOff_ = 0;
 
 	std::vector<AtracLoopInfo> loopinfo_;
 
-	int loopStartSample_;
-	int loopEndSample_;
-	int loopNum_;
+	int loopStartSample_ = -1;
+	int loopEndSample_ = -1;
+	int loopNum_ = 0;
 
-	bool failedDecode_;
+	bool failedDecode_ = false;
 	// Indicates that the dataBuf_ array should not be used.
-	bool ignoreDataBuf_;
+	bool ignoreDataBuf_ = false;
 
-	u32 codecType_;
-	AtracStatus bufferState_;
+	u32 codecType_ = 0;
+	AtracStatus bufferState_ = ATRAC_STATUS_NO_DATA;
 
 	InputBuffer first_;
 	InputBuffer second_;
diff --git a/Core/HLE/sceAtrac.h b/Core/HLE/sceAtrac.h
index f0914c1c63..cc2c14e943 100644
--- a/Core/HLE/sceAtrac.h
+++ b/Core/HLE/sceAtrac.h
@@ -48,8 +48,7 @@ typedef AtracStatus AtracStatus_le;
 typedef swap_struct_t<AtracStatus, swap_32_t<AtracStatus> > AtracStatus_le;
 #endif
 
-typedef struct
-{
+struct SceAtracIdInfo {
     u32_le decodePos; // 0
     u32_le endSample; // 4
     u32_le loopStart; // 8
@@ -76,15 +75,14 @@ typedef struct
     u32_le secondBufferByte; // 68
     // make sure the size is 128
 	u8 unk[56];
-} SceAtracIdInfo;
+};
 
-typedef struct
-{
+struct SceAtracId {
 	// size 128
     SceAudiocodecCodec codec;
 	// size 128
     SceAtracIdInfo info;
-} SceAtracId;
+};
 
 // provide some decoder interface
 
diff --git a/Core/HW/Atrac3Standalone.cpp b/Core/HW/Atrac3Standalone.cpp
index da1ccdcd21..1e505c02db 100644
--- a/Core/HW/Atrac3Standalone.cpp
+++ b/Core/HW/Atrac3Standalone.cpp
@@ -16,13 +16,13 @@ inline int16_t clamp16(float f) {
 class Atrac3Audio : public AudioDecoder {
 public:
 	Atrac3Audio(PSPAudioType audioType, int channels, size_t blockAlign, const uint8_t *extraData, size_t extraDataSize) : audioType_(audioType) {
-		blockAlign_ = blockAlign;
+		blockAlign_ = (int)blockAlign;
 		if (audioType == PSP_CODEC_AT3PLUS) {
 			at3pCtx_ = atrac3p_alloc(channels, &blockAlign_);
 			if (at3pCtx_)
 				codecOpen_ = true;
 		} else if (audioType_ == PSP_CODEC_AT3) {
-			at3Ctx_ = atrac3_alloc(channels, &blockAlign_, extraData, extraDataSize);
+			at3Ctx_ = atrac3_alloc(channels, &blockAlign_, extraData, (int)extraDataSize);
 			if (at3Ctx_)
 				codecOpen_ = true;
 		}