add synthio example.

Author: FoamyGuy

examples/fruitjam_synthio_speaker.py

@@ -0,0 +1,27 @@
+# SPDX-FileCopyrightText: Copyright (c) 2025 Tim Cocks for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+import time
+
+import synthio
+
+import adafruit_fruitjam
+
+pobj = adafruit_fruitjam.peripherals.Peripherals(audio_output="headphone")
+
+synth = synthio.Synthesizer(sample_rate=44100)
+pobj.audio.play(synth)
+VOLUMES = [5, 7, 10, 12, 15]
+C_major_scale = [60, 62, 64, 65, 67, 69, 71, 72, 71, 69, 67, 65, 64, 62, 60]
+while True:
+    print("\n=== Synthio Test ===")
+    for vol in VOLUMES:
+        pobj.volume = vol
+        print(f"Speaker volume: {vol}")
+        for note in C_major_scale:
+            synth.press(note)
+            time.sleep(0.1)
+            synth.release(note)
+            time.sleep(0.05)
+
+    time.sleep(1.0)