I don't get any sounds at all from Navigator 11 free running on an HTC HD2. (except a short beep when using volume up/down) I have installed English voices. I see a file sounds_en.mca and sounds_xx_signal.mca in the same folder as the map data united_kingdom_osm.mca
I am using NavigatorFree on a Samsung Galaxy III, Android 4.1.1 The sound in Navigator is somehow linked to Music Player. If the sound is on mute in Music Player, i do not have sound in Navigator, and vice versa. Not sure why there is this link between various apps. Music Player mute/unmute controls sound in my MobileMetronome app the same way. If I get a bluetooth call in the car, Navigator may lose sound; I can switch it back on by going to Music Player, where I find that the volume has been switched automatically by the device to mute, so I switch it back on. This app has personality, I'll give it that. Wouldn't travel without it, though.