Properly silence buffer while not in use, fixes #14866

servers/audio/audio_stream.cpp

@@ -76,14 +76,14 @@ void AudioStreamPlaybackResampled::mix(AudioFrame *p_buffer, float p_rate_scale,
 			internal_buffer[1] = internal_buffer[INTERNAL_BUFFER_LEN + 1];
 			internal_buffer[2] = internal_buffer[INTERNAL_BUFFER_LEN + 2];
 			internal_buffer[3] = internal_buffer[INTERNAL_BUFFER_LEN + 3];
-			if (!is_playing()) {
-				for (int i = 4; i < INTERNAL_BUFFER_LEN; ++i) {
-					internal_buffer[i] = AudioFrame(0, 0);
+			if (is_playing()) {
+				_mix_internal(internal_buffer + 4, INTERNAL_BUFFER_LEN);
+			} else {
+				//fill with silence, not playing
+				for (int i = 0; i < INTERNAL_BUFFER_LEN; ++i) {
+					internal_buffer[i + 4] = AudioFrame(0, 0);
 				}
-
-				return;
 			}
-			_mix_internal(internal_buffer + 4, INTERNAL_BUFFER_LEN);
 			mix_offset -= (INTERNAL_BUFFER_LEN << FP_BITS);
 		}
 	}