Increase the number of audio channels to PS2 count and some small audio fixes

src/audio/audio_enums.h

@@ -1295,3 +1295,26 @@ enum eAudioType
 	AUDIOTYPE_POLICERADIO,
 	TOTAL_AUDIO_TYPES,
 };
+
+#ifdef GTA_PS2
+enum
+{
+	NUM_CHANNELS_GENERIC = 42,
+	CHANNEL_POLICE_RADIO = NUM_CHANNELS_GENERIC,
+	CHANNEL_MISSION_AUDIO_1,
+	CHANNEL_MISSION_AUDIO_2,
+	CHANNEL_PLAYER_VEHICLE_ENGINE,
+	NUM_CHANNELS
+};
+#else
+enum
+{
+#ifdef PS2_AUDIO_CHANNELS
+	NUM_CHANNELS_GENERIC = 42,
+#else
+	NUM_CHANNELS_GENERIC = 27,
+#endif
+	CHANNEL_POLICE_RADIO,
+	NUM_CHANNELS
+};
+#endif