Fix more Teensy LC warnings

analyze_fft256.cpp

@@ -31,6 +31,7 @@
 
 
 // 140312 - PAH - slightly faster copy
+__attribute__((unused))
 static void copy_to_fft_buffer(void *destination, const void *source)
 {
 	const uint16_t *src = (const uint16_t *)source;
@@ -41,6 +42,7 @@ static void copy_to_fft_buffer(void *destination, const void *source)
 	}
 }
 
+__attribute__((unused))
 static void apply_window_to_fft_buffer(void *buffer, const void *window)
 {
 	int16_t *buf = (int16_t *)buffer;

effect_freeverb.cpp

@@ -73,6 +73,7 @@ AudioEffectFreeverb::AudioEffectFreeverb() : AudioStream(1, inputQueueArray)
 
 
 // cleaner sat16 by http://www.moseleyinstruments.com/
+__attribute__((unused))
 static int16_t sat16(int32_t n, int rshift) {
     // we should always round towards 0
     // to avoid recirculating round-off noise

effect_midside.cpp

@@ -25,6 +25,9 @@
  */
 
 #include <Arduino.h>
+
+#if !defined(KINETISL)
+
 #include "effect_midside.h"
 
 void AudioEffectMidSide::update(void)
@@ -92,3 +95,4 @@ void AudioEffectMidSide::update(void)
 	release(blocka);
 	release(blockb);
 }
+#endif

output_tdm.cpp

@@ -25,6 +25,9 @@
  */
 
 #include <Arduino.h>
+
+#if !defined(KINETISL)
+
 #include "output_tdm.h"
 #include "memcpy_audio.h"
 #include "utility/imxrt_hw.h"
@@ -336,3 +339,4 @@ void AudioOutputTDM::config_tdm(void)
 #endif
 }
 
+#endif

synth_whitenoise.cpp

@@ -35,7 +35,7 @@ void AudioSynthNoiseWhite::update(void)
 	audio_block_t *block;
 	uint32_t *p, *end;
 	int32_t n1, n2, gain;
-	uint32_t lo, hi, val1, val2;
+	uint32_t lo, hi;
 
 	gain = level;
 	if (gain == 0) return;
@@ -46,6 +46,8 @@ void AudioSynthNoiseWhite::update(void)
 	lo = seed;
 	do {
 #if defined(__ARM_ARCH_7EM__)
+		uint32_t val1, val2;
+		
 		hi = multiply_16bx16t(16807, lo); // 16807 * (lo >> 16)
 		lo = 16807 * (lo & 0xFFFF);
 		lo += (hi & 0x7FFF) << 16;
@@ -75,6 +77,8 @@ void AudioSynthNoiseWhite::update(void)
 		*p++ = val1;
 		*p++ = val2;
 #elif defined(KINETISL)
+		uint32_t val1;
+		
 		hi = 16807 * (lo >> 16);
 		lo = 16807 * (lo & 0xFFFF);
 		lo += (hi & 0x7FFF) << 16;