diff --git a/libraries/zmusic/mididevices/mididevice.h b/libraries/zmusic/mididevices/mididevice.h
index 27e06e170..5cda68017 100644
--- a/libraries/zmusic/mididevices/mididevice.h
+++ b/libraries/zmusic/mididevices/mididevice.h
@@ -70,18 +70,18 @@ public:
 	SoftSynthMIDIDevice(int samplerate, int minrate = 1, int maxrate = 1000000 /* something higher than any valid value */);
 	~SoftSynthMIDIDevice();
 
-	void Close();
-	bool IsOpen() const;
-	int GetTechnology() const;
-	int SetTempo(int tempo);
-	int SetTimeDiv(int timediv);
-	int StreamOut(MidiHeader *data);
-	int StreamOutSync(MidiHeader *data);
-	int Resume();
-	void Stop();
-	bool Pause(bool paused);
+	void Close() override;
+	bool IsOpen() const override;
+	int GetTechnology() const override;
+	int SetTempo(int tempo) override;
+	int SetTimeDiv(int timediv) override;
+	int StreamOut(MidiHeader *data) override;
+	int StreamOutSync(MidiHeader *data) override;
+	int Resume() override;
+	void Stop() override;
+	bool Pause(bool paused) override;
 
-	virtual int Open();
+	virtual int Open() override;
 	virtual bool ServiceStream(void* buff, int numbytes);
 	int GetSampleRate() const { return SampleRate; }
 	SoundStreamInfo GetStreamInfo() const override;
diff --git a/libraries/zmusic/mididevices/music_adlmidi_mididevice.cpp b/libraries/zmusic/mididevices/music_adlmidi_mididevice.cpp
index 54f7e6ef3..acb0c695b 100644
--- a/libraries/zmusic/mididevices/music_adlmidi_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_adlmidi_mididevice.cpp
@@ -46,14 +46,14 @@ public:
 	ADLMIDIDevice(const ADLConfig *config);
 	~ADLMIDIDevice();
 	
-	int OpenRenderer();
+	int OpenRenderer() override;
 	int GetDeviceType() const override { return MDEV_ADL; }
 
 protected:
 	
-	void HandleEvent(int status, int parm1, int parm2);
-	void HandleLongEvent(const uint8_t *data, int len);
-	void ComputeOutput(float *buffer, int len);
+	void HandleEvent(int status, int parm1, int parm2) override;
+	void HandleLongEvent(const uint8_t *data, int len) override;
+	void ComputeOutput(float *buffer, int len) override;
 	
 private:
 	int LoadCustomBank(const ADLConfig *config);
@@ -236,7 +236,7 @@ MIDIDevice *CreateADLMIDIDevice(const char *Args)
 		if (*bank >= '0' && *bank <= '9')
 		{
 			// Args specify a bank by index.
-			int newbank = (int)strtoll(bank, nullptr, 10);
+			config.adl_bank = (int)strtoll(bank, nullptr, 10);
 			config.adl_use_custom_bank = false;
 		}
 		else
diff --git a/libraries/zmusic/mididevices/music_fluidsynth_mididevice.cpp b/libraries/zmusic/mididevices/music_fluidsynth_mididevice.cpp
index e9b009950..2021b7451 100644
--- a/libraries/zmusic/mididevices/music_fluidsynth_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_fluidsynth_mididevice.cpp
@@ -59,17 +59,17 @@ public:
 	FluidSynthMIDIDevice(int samplerate, std::vector<std::string> &config, int (*printfunc_)(const char *, ...));
 	~FluidSynthMIDIDevice();
 	
-	int OpenRenderer();
+	int OpenRenderer() override;
 	std::string GetStats() override;
-	void ChangeSettingInt(const char *setting, int value);
-	void ChangeSettingNum(const char *setting, double value);
-	void ChangeSettingString(const char *setting, const char *value);
+	void ChangeSettingInt(const char *setting, int value) override;
+	void ChangeSettingNum(const char *setting, double value) override;
+	void ChangeSettingString(const char *setting, const char *value) override;
 	int GetDeviceType() const override { return MDEV_FLUIDSYNTH; }
 	
 protected:
-	void HandleEvent(int status, int parm1, int parm2);
-	void HandleLongEvent(const uint8_t *data, int len);
-	void ComputeOutput(float *buffer, int len);
+	void HandleEvent(int status, int parm1, int parm2) override;
+	void HandleLongEvent(const uint8_t *data, int len) override;
+	void ComputeOutput(float *buffer, int len) override;
 	int LoadPatchSets(const std::vector<std::string>& config);
 	
 	fluid_settings_t *FluidSettings;
@@ -199,7 +199,6 @@ FluidSynthMIDIDevice::FluidSynthMIDIDevice(int samplerate, std::vector<std::stri
 		fluidConfig.fluid_chorus_speed, fluidConfig.fluid_chorus_depth, fluidConfig.fluid_chorus_type);
 
 	// try loading a patch set that got specified with $mididevice.
-	int res = 0;
 
 	if (LoadPatchSets(config))
 	{
diff --git a/libraries/zmusic/mididevices/music_opl_mididevice.cpp b/libraries/zmusic/mididevices/music_opl_mididevice.cpp
index 075499429..f7503f689 100644
--- a/libraries/zmusic/mididevices/music_opl_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_opl_mididevice.cpp
@@ -60,18 +60,18 @@ class OPLMIDIDevice : public SoftSynthMIDIDevice, protected OPLmusicBlock
 {
 public:
 	OPLMIDIDevice(int core);
-	int OpenRenderer();
-	void Close();
-	int GetTechnology() const;
+	int OpenRenderer() override;
+	void Close() override;
+	int GetTechnology() const override;
 	std::string GetStats() override;
 
 protected:
-	void CalcTickRate();
-	int PlayTick();
-	void HandleEvent(int status, int parm1, int parm2);
-	void HandleLongEvent(const uint8_t *data, int len);
-	void ComputeOutput(float *buffer, int len);
-	bool ServiceStream(void *buff, int numbytes);
+	void CalcTickRate() override;
+	int PlayTick() override;
+	void HandleEvent(int status, int parm1, int parm2) override;
+	void HandleLongEvent(const uint8_t *data, int len) override;
+	void ComputeOutput(float *buffer, int len) override;
+	bool ServiceStream(void *buff, int numbytes) override;
 	int GetDeviceType() const override { return MDEV_OPL; }
 };
 
diff --git a/libraries/zmusic/mididevices/music_opnmidi_mididevice.cpp b/libraries/zmusic/mididevices/music_opnmidi_mididevice.cpp
index 81fee8a88..d00f050ae 100644
--- a/libraries/zmusic/mididevices/music_opnmidi_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_opnmidi_mididevice.cpp
@@ -47,13 +47,13 @@ public:
 	~OPNMIDIDevice();
 	
 	
-	int OpenRenderer();
+	int OpenRenderer() override;
 	int GetDeviceType() const override { return MDEV_OPN; }
 	
 protected:
-	void HandleEvent(int status, int parm1, int parm2);
-	void HandleLongEvent(const uint8_t *data, int len);
-	void ComputeOutput(float *buffer, int len);
+	void HandleEvent(int status, int parm1, int parm2) override;
+	void HandleLongEvent(const uint8_t *data, int len) override;
+	void ComputeOutput(float *buffer, int len) override;
 	
 private:
 	int LoadCustomBank(const char *bankfile);
diff --git a/libraries/zmusic/mididevices/music_softsynth_mididevice.cpp b/libraries/zmusic/mididevices/music_softsynth_mididevice.cpp
index 25250f93c..b346b7d37 100644
--- a/libraries/zmusic/mididevices/music_softsynth_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_softsynth_mididevice.cpp
@@ -369,7 +369,6 @@ bool SoftSynthMIDIDevice::ServiceStream (void *buff, int numbytes)
 	float *samples = (float *)buff;
 	float *samples1;
 	int numsamples = numbytes / sizeof(float) / 2;
-	bool prev_ended = false;
 	bool res = true;
 
 	samples1 = samples;
diff --git a/libraries/zmusic/mididevices/music_timidity_mididevice.cpp b/libraries/zmusic/mididevices/music_timidity_mididevice.cpp
index 981c03dc6..44837462f 100644
--- a/libraries/zmusic/mididevices/music_timidity_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_timidity_mididevice.cpp
@@ -71,16 +71,16 @@ public:
 	TimidityMIDIDevice(int samplerate);
 	~TimidityMIDIDevice();
 	
-	int OpenRenderer();
-	void PrecacheInstruments(const uint16_t *instruments, int count);
+	int OpenRenderer() override;
+	void PrecacheInstruments(const uint16_t *instruments, int count) override;
 	int GetDeviceType() const override { return MDEV_GUS; }
 	
 protected:
 	Timidity::Renderer *Renderer;
 	
-	void HandleEvent(int status, int parm1, int parm2);
-	void HandleLongEvent(const uint8_t *data, int len);
-	void ComputeOutput(float *buffer, int len);
+	void HandleEvent(int status, int parm1, int parm2) override;
+	void HandleLongEvent(const uint8_t *data, int len) override;
+	void ComputeOutput(float *buffer, int len) override;
 };
 
 
@@ -265,7 +265,7 @@ bool GUS_SetupConfig(const char* args)
 	if (*args == 0) args = gusConfig.gus_config.c_str();
 	if (stricmp(gusConfig.loadedConfig.c_str(), args) == 0) return false; // aleady loaded
 
-	MusicIO::SoundFontReaderInterface *reader;
+	MusicIO::SoundFontReaderInterface *reader = nullptr;
 	if (musicCallbacks.OpenSoundFont)
 	{
 		reader = musicCallbacks.OpenSoundFont(args, SF_GUS | SF_SF2);
diff --git a/libraries/zmusic/mididevices/music_timiditypp_mididevice.cpp b/libraries/zmusic/mididevices/music_timiditypp_mididevice.cpp
index 7b43f34b6..bffebf4b1 100644
--- a/libraries/zmusic/mididevices/music_timiditypp_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_timiditypp_mididevice.cpp
@@ -48,8 +48,8 @@ public:
 	TimidityPPMIDIDevice(int samplerate);
 	~TimidityPPMIDIDevice();
 
-	int OpenRenderer();
-	void PrecacheInstruments(const uint16_t *instruments, int count);
+	int OpenRenderer() override;
+	void PrecacheInstruments(const uint16_t *instruments, int count) override;
 	//std::string GetStats();
 	int GetDeviceType() const override { return MDEV_TIMIDITY; }
 
@@ -58,9 +58,9 @@ public:
 protected:
 	TimidityPlus::Player *Renderer;
 
-	void HandleEvent(int status, int parm1, int parm2);
-	void HandleLongEvent(const uint8_t *data, int len);
-	void ComputeOutput(float *buffer, int len);
+	void HandleEvent(int status, int parm1, int parm2) override;
+	void HandleLongEvent(const uint8_t *data, int len) override;
+	void ComputeOutput(float *buffer, int len) override;
 	void LoadInstruments();
 };
 
@@ -198,7 +198,7 @@ bool Timidity_SetupConfig(const char* args)
 	if (*args == 0) args = timidityConfig.timidity_config.c_str();
 	if (stricmp(timidityConfig.loadedConfig.c_str(), args) == 0) return false; // aleady loaded
 
-	MusicIO::SoundFontReaderInterface* reader;
+	MusicIO::SoundFontReaderInterface* reader = nullptr;
 	if (musicCallbacks.OpenSoundFont)
 	{
 		reader = musicCallbacks.OpenSoundFont(args, SF_GUS | SF_SF2);
diff --git a/libraries/zmusic/mididevices/music_wildmidi_mididevice.cpp b/libraries/zmusic/mididevices/music_wildmidi_mididevice.cpp
index 0ffea96ab..1bdd7e738 100644
--- a/libraries/zmusic/mididevices/music_wildmidi_mididevice.cpp
+++ b/libraries/zmusic/mididevices/music_wildmidi_mididevice.cpp
@@ -51,19 +51,19 @@ public:
 	WildMIDIDevice(int samplerate);
 	~WildMIDIDevice();
 	
-	int OpenRenderer();
-	void PrecacheInstruments(const uint16_t *instruments, int count);
-	std::string GetStats();
+	int OpenRenderer() override;
+	void PrecacheInstruments(const uint16_t *instruments, int count) override;
+	std::string GetStats() override;
 	int GetDeviceType() const override { return MDEV_WILDMIDI; }
 	
 protected:
 	WildMidi::Renderer *Renderer;
 	std::shared_ptr<WildMidi::Instruments> instruments;
 	
-	void HandleEvent(int status, int parm1, int parm2);
-	void HandleLongEvent(const uint8_t *data, int len);
-	void ComputeOutput(float *buffer, int len);
-	void ChangeSettingInt(const char *opt, int set);
+	void HandleEvent(int status, int parm1, int parm2) override;
+	void HandleLongEvent(const uint8_t *data, int len) override;
+	void ComputeOutput(float *buffer, int len) override;
+	void ChangeSettingInt(const char *opt, int set) override;
 	void LoadInstruments();
 
 };
@@ -244,7 +244,7 @@ bool WildMidi_SetupConfig(const char* args)
 	if (*args == 0) args = wildMidiConfig.config.c_str();
 	if (stricmp(wildMidiConfig.loadedConfig.c_str(), args) == 0) return false; // aleady loaded
 
-	MusicIO::SoundFontReaderInterface* reader;
+	MusicIO::SoundFontReaderInterface* reader = nullptr;
 	if (musicCallbacks.OpenSoundFont)
 	{
 		reader = musicCallbacks.OpenSoundFont(args, SF_GUS);
diff --git a/libraries/zmusic/midisources/midisource_mus.cpp b/libraries/zmusic/midisources/midisource_mus.cpp
index b5c2dfc8c..0791bfdcf 100644
--- a/libraries/zmusic/midisources/midisource_mus.cpp
+++ b/libraries/zmusic/midisources/midisource_mus.cpp
@@ -177,7 +177,6 @@ std::vector<uint16_t> MUSSong2::PrecacheData()
 	std::vector<uint16_t> work;
 	const uint8_t *used = MusData.data() + sizeof(MUSHeader) / sizeof(uint8_t);
 	int i, k;
-	size_t p = 0;
 
 	int numinstr = LittleShort(MusHeader->NumInstruments);
 	work.reserve(LittleShort(MusHeader->NumInstruments));
diff --git a/libraries/zmusic/streamsources/music_dumb.cpp b/libraries/zmusic/streamsources/music_dumb.cpp
index 95de21e77..1fbc78651 100644
--- a/libraries/zmusic/streamsources/music_dumb.cpp
+++ b/libraries/zmusic/streamsources/music_dumb.cpp
@@ -152,17 +152,6 @@ typedef struct MODMIDICFG
 
 // CODE --------------------------------------------------------------------
 
-//==========================================================================
-//
-// time_to_samples
-//
-//==========================================================================
-
-static inline uint64_t time_to_samples(double p_time,int p_sample_rate)
-{
-	return (uint64_t)floor((double)p_sample_rate * p_time + 0.5);
-}
-
 //==========================================================================
 //
 // ReadDUH
diff --git a/libraries/zmusic/streamsources/music_xa.cpp b/libraries/zmusic/streamsources/music_xa.cpp
index 45f2d6614..8bd0eb23d 100644
--- a/libraries/zmusic/streamsources/music_xa.cpp
+++ b/libraries/zmusic/streamsources/music_xa.cpp
@@ -291,7 +291,6 @@ bool XASong::Start()
 
 bool XASong::GetData(void *vbuff, size_t len)
 {
-	auto olen = len;
 	float *dest = (float*)vbuff;
 	while (len > 0)
 	{
diff --git a/libraries/zmusic/zmusic/configuration.cpp b/libraries/zmusic/zmusic/configuration.cpp
index 547485a55..c583b17fe 100644
--- a/libraries/zmusic/zmusic/configuration.cpp
+++ b/libraries/zmusic/zmusic/configuration.cpp
@@ -148,6 +148,9 @@ bool ChangeMusicSetting(ZMusic::EIntConfigKey key, MusInfo *currSong, int value,
 {
 	switch (key)
 	{
+		default:
+			return false;
+			
 		case adl_chips_count: 
 			ChangeAndReturn(adlConfig.adl_chips_count, value, pRealValue);
 			return devType() == MDEV_ADL;
@@ -466,6 +469,9 @@ bool ChangeMusicSetting(ZMusic::EFloatConfigKey key, MusInfo* currSong, float va
 {
 	switch (key)
 	{
+		default:
+			return false;
+			
 		case fluid_gain: 
 			if (value < 0)
 				value = 0;
@@ -615,6 +621,9 @@ bool ChangeMusicSetting(ZMusic::EStringConfigKey key, MusInfo* currSong, const c
 {
 	switch (key)
 	{
+		default:
+			return false;
+			
 		case adl_custom_bank: 
 			adlConfig.adl_custom_bank = value;
 			return devType() == MDEV_ADL;
diff --git a/libraries/zmusic/zmusic/musinfo.h b/libraries/zmusic/zmusic/musinfo.h
index 04661d10e..ed907fb22 100644
--- a/libraries/zmusic/zmusic/musinfo.h
+++ b/libraries/zmusic/zmusic/musinfo.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <string>
 #include "mididefs.h"
 
 // The base music class. Everything is derived from this --------------------
diff --git a/src/sound/backend/i_sound.cpp b/src/sound/backend/i_sound.cpp
index 25ce6f6d5..b593fee3f 100644
--- a/src/sound/backend/i_sound.cpp
+++ b/src/sound/backend/i_sound.cpp
@@ -321,7 +321,7 @@ void I_ShutdownSound()
 	}
 }
 
-const char *GetSampleTypeName(enum SampleType type)
+const char *GetSampleTypeName(SampleType type)
 {
     switch(type)
     {
@@ -331,7 +331,7 @@ const char *GetSampleTypeName(enum SampleType type)
     return "(invalid sample type)";
 }
 
-const char *GetChannelConfigName(enum ChannelConfig chan)
+const char *GetChannelConfigName(ChannelConfig chan)
 {
     switch(chan)
     {
diff --git a/src/sound/backend/i_soundinternal.h b/src/sound/backend/i_soundinternal.h
index 80a57b7ec..75874b6c3 100644
--- a/src/sound/backend/i_soundinternal.h
+++ b/src/sound/backend/i_soundinternal.h
@@ -6,6 +6,7 @@
 #include "doomtype.h"
 #include "vectors.h"
 #include "tarray.h"
+#include "zmusic/sounddecoder.h"
 #include "../../libraries/music_common/fileio.h"
 
 class FileReader;
@@ -116,9 +117,6 @@ struct FISoundChannel
 
 void FindLoopTags(MusicIO::FileInterface *fr, uint32_t *start, bool *startass, uint32_t *end, bool *endass);
 
-
-const char *GetSampleTypeName(enum SampleType type);
-const char *GetChannelConfigName(enum ChannelConfig chan);
 class SoundStream;
 
 
diff --git a/src/sound/backend/oalsound.cpp b/src/sound/backend/oalsound.cpp
index d5265cdbf..3236b2b32 100644
--- a/src/sound/backend/oalsound.cpp
+++ b/src/sound/backend/oalsound.cpp
@@ -47,6 +47,9 @@
 #include "zmusic/sounddecoder.h"
 #include "filereadermusicinterface.h"
 
+const char *GetSampleTypeName(SampleType type);
+const char *GetChannelConfigName(ChannelConfig chan);
+
 FModule OpenALModule{"OpenAL"};
 
 #include "oalload.h"