Exactly as the title says.
Pro Tools 10 with ONE HDX card (c.€10,000) will give you a max of 256 audio tracks.
Pro Tools 10 (€605) will give you 96 audio tracks.
Pro Tools 10 with Complete Production Toolkit (c.€2,400) will give us 256 audio tracks.
Of course if one is to up the sampling rate to 88.2kHz or 96kHz the audio track limitation halfs, and further still if at 192kHz the audio track count is quartered!
..... Cubase 6 (c.€550) = Unlimited Audio Tracks and has never heard of 'Voices' nonsense unless they are in a song!