update to 1.9.7

examples/PlayFLAC-SD-SPDIF/PlayFLAC-SD-SPDIF.ino

@@ -1,4 +1,8 @@
 #include <Arduino.h>
+#ifdef ARDUINO_ARCH_RP2040
+void setup() {}
+void loop() {}
+#else
 #include "AudioFileSourceSD.h"
 #include "AudioOutputSPDIF.h"
 #include "AudioGeneratorFLAC.h"
@@ -8,7 +12,7 @@
 // Espressif Audio Development Framework at:
 // https://docs.espressif.com/projects/esp-adf/en/latest/design-guide/audio-samples.html
 //
-// On ESP8266 you might need to reencode FLAC files with max '-2' compression level 
+// On ESP8266 you might need to re-encode FLAC files with max '-2' compression level 
 // (i.e. 1152 maximum block size) or you will run out of memory. FLAC files will be 
 // slightly bigger but you don't loose audio quality with reencoding (lossles codec).
 
@@ -61,8 +65,10 @@ void loop() {
         }
       } 
     } else {
-      Serial.println(F("Playback form SD card done\n"));
+      Serial.println(F("Playback from SD card done\n"));
       delay(1000);
     }       
   }
 }
+#endif
+