TTS works but you need to make sure the info.ini has the correct engine (tts_engine="nuance_ve1") and voice data (E.g eng) Basarsoft needs, you must have the correct content in tts_nua_ve1 folder for the voice to work even though it shows up it the settings.

Basarsoft does not use global Android TTS settings like other Nextgen versions, it uses the local data in the tts_nua_ve1 folder that sits in the IGO_basar.

I have a working Avic setup with TTS, copying the voice from Avic to Basarsoft did not work as it was setup to use Android TTS.

I use this [Only registered and activated users can see links. ] voice for Avic but it didn't show up in Basarsoft until I edited it.

I could be wrong but this is how it finally worked for me.
quoted in OP