diff --git a/Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/.qt_py_rp2040.test.only b/Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/.feather_rp2040.test.only
similarity index 100%
rename from Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/.qt_py_rp2040.test.only
rename to Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/.feather_rp2040.test.only
diff --git a/Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/PWMAudio_Mono_RP2040.ino b/Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/PWMAudio_Mono_RP2040.ino
index 13caa521d..349ddaacc 100644
--- a/Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/PWMAudio_Mono_RP2040.ino
+++ b/Adafruit_STEMMA_Audio_Amp/Arduino/PWMAudio_Mono_RP2040/PWMAudio_Mono_RP2040.ino
@@ -1,3 +1,8 @@
+// SPDX-FileCopyrightText: 2023 Kattni Rembor for Adafruit Industries
+// SPDX-FileCopyrightText: Earle F. Philhower, III
+//
+// SPDX-License-Identifier: MIT
+
 /*
   This example plays a tune through a mono amplifier using a simple sine wave.