src: Update test_record.py.

Signed-off-by: Damien George <damien@micropython.org>

Author: dpgeorge

src/test_record.py

@@ -22,11 +22,11 @@
     "00000"
 )
 
-my_recording = audio.AudioFrame(5000)
+my_recording = audio.AudioRecording(duration=5000)
 
 while True:
     if button_a.is_pressed():
-        microphone.record_into(my_recording, wait=False)
+        my_track = microphone.record_into(my_recording, wait=False)
         display.show([mouth_open, mouth_closed], loop=True, wait=False, delay=150)
         while button_a.is_pressed() and microphone.is_recording():
             sleep(50)
@@ -35,9 +35,13 @@
         while button_a.is_pressed():
             sleep(50)
         display.clear()
-        my_recording *= 2  # amplify volume
+        # amplify volume
+        GAIN = 2
+        #my_recording *= GAIN
+        for i in range(len(my_track)):
+            my_track[i] = max(0, min(128 + GAIN * (my_track[i] - 128), 255))
     if button_b.is_pressed():
-        audio.play(my_recording, wait=False)
+        audio.play(my_track, wait=False)
         level = 0
         while audio.is_playing():
             l = audio.sound_level()
@@ -47,7 +51,7 @@
                 level *= 0.95
             display.show(play * min(1, level / 100))
             x = accelerometer.get_x()
-            my_recording.set_rate(max(2250, scale(x, (-1000, 1000), (2250, 13374))))
+            my_track.set_rate(max(2250, scale(x, (-1000, 1000), (2250, 13374))))
             sleep(5)
         display.clear()
     sleep(100)