Rename AudioPlaySDcardWAV to AudioPlaySdWav

examples/PlayWavFromSdCard/PlayWavFromSdCard.ino

 // Create the Audio components.  These should be created in the
 // order data flows, inputs/sources -> processing -> outputs
 //
-AudioPlaySDcardWAV wav;
+AudioPlaySdWav     wav;
 AudioOutputI2S     dac;
 
 // Create Audio connections between the components

play_sd_wav.cpp

 #define STATE_PARSE4			11 // ignoring unknown chunk
 #define STATE_STOP			12
 
-void AudioPlaySDcardWAV::begin(void)
+void AudioPlaySdWav::begin(void)
 {
 	state = STATE_STOP;
 	state_play = STATE_STOP;
 }
 
 
-bool AudioPlaySDcardWAV::play(const char *filename)
+bool AudioPlaySdWav::play(const char *filename)
 {
 	stop();
 	wavfile = SD.open(filename);
 	return true;
 }
 
-void AudioPlaySDcardWAV::stop(void)
+void AudioPlaySdWav::stop(void)
 {
 	__disable_irq();
 	if (state != STATE_STOP) {
 	}
 }
 
-bool AudioPlaySDcardWAV::start(void)
+bool AudioPlaySdWav::start(void)
 {
 	__disable_irq();
 	if (state == STATE_STOP) {
 }
 
 
-void AudioPlaySDcardWAV::update(void)
+void AudioPlaySdWav::update(void)
 {
 	// only update if we're playing
 	if (state == STATE_STOP) return;
 // https://ccrma.stanford.edu/courses/422/projects/WaveFormat/
 
 // Consume already buffered data.  Returns true if audio transmitted.
-bool AudioPlaySDcardWAV::consume(void)
+bool AudioPlaySdWav::consume(void)
 {
 	uint32_t len, size;
 	uint8_t lsb, msb;
 	p = buffer + 512 - size;
 start:
 	if (size == 0) return false;
-	//Serial.print("AudioPlaySDcardWAV write, size = ");
+	//Serial.print("AudioPlaySdWav write, size = ");
 	//Serial.print(size);
 	//Serial.print(", data_length = ");
 	//Serial.print(data_length);
 
 	  // this is not supposed to happen!
 	  //default:
-		//Serial.println("AudioPlaySDcardWAV, unknown state");
+		//Serial.println("AudioPlaySdWav, unknown state");
 	}
 	state_play = STATE_STOP;
 	state = STATE_STOP;
 
 
 
-bool AudioPlaySDcardWAV::parse_format(void)
+bool AudioPlaySdWav::parse_format(void)
 {
 	uint8_t num = 0;
 	uint16_t format;

play_sd_wav.h

 #include "AudioStream.h"
 #include "SD.h"
 
-class AudioPlaySDcardWAV : public AudioStream
+class AudioPlaySdWav : public AudioStream
 {
 public:
-	AudioPlaySDcardWAV(void) : AudioStream(0, NULL) { begin(); }
+	AudioPlaySdWav(void) : AudioStream(0, NULL) { begin(); }
 	void begin(void);
 
 	bool play(const char *filename);