It is not the TTS part . But only for the Google Maps Navigation ! It is possible to port them from other navigation software to Android .
And most important :NO ROOT NEEDED !
It is my believe that this is possible on all Android devices wich run Google Maps Navigation . But since i only own an S3 , i only can confirm that it is working at the S3 for the moment .
*EDIT* I just tested this on my girlfriend's Galaxy Note , SHe has it Stock , and it worked . No hassel , just renamed the original file to : instruction-voices.org.zip , placed the modded one there two , fired up navigation and immediatley i heard the modded voice
Sadly for the moment , i just made one in Dutch wich you can get here
I've also made one with the voice of Snoop , but since that one isn't finished yet , i shall not post it yet .
It works like this :
Open the app navigation , so that the app makes the files on your sd-card .
When you navigate on your device to :
You will find an map wich contains an voice-instructions.zip file . In that file lies the .ogg files wich contain the voices of the navigation part .
If you want to place your own voice . Open that voice-instruction.zip file listen to every .ogg file, change every file with an soundeditor program like audacity . When you are finished put al the files.in an .zip with the name voice-instruction .
Make an back up of the original voice-instruction.zip , and delete it from your folder . Place the modded on there and you are good to go !
I am not responsible for what happens (to you or others) on the road when you are listening to this or your own creation after following this !
Keep your eyes on the road ! gheghe
Also an other warning : i've encounterd some residu of the old voice even after replacing the modded voice for the original one ( thats how i got back to stock again ) to get rid of that i deleted the buffer and data in : settings/aplications/all /maps . But doing so it also deleted every route etc.
Someone gave me the tip to just delete the cache , but i did not come that far yet , so watch out when you follow this , you maby can lose some data ! Again , doing this is at your own risk !
I am looking forward to the future of the navigation voices ! May it be grow as big as TomTom !!
Have fun !
For UK (metric system) : Download = to be placed in : storage/sdcard/Android/data/com.google.android.apps.maps/testdata/voice/en_GB.f4cac31d
For UK (imperial system) : Download = To be placed in : storage/sdcard/Android/data/com.google.android.apps.maps/testdata/voice/en_GB.i.a3ef9dbb
For US (metric system) : Download = to be placed in : storage/sdcard/Android/data/com.google.android.apps.maps/testdata/voice/en_US.f4cac31d
For US (imperial system) : Download = to be placed in : storage/sdcard/Android/data/com.google.android.apps.maps/testdata/voice/en_US.a3ef9dbb