আইটিসি স্পিরিট বক্স - ইন্সট্রুমেন্টাল ট্রান্স কমিউনিকেশন স্পিরিট বক্স
The application contains several soundbanks with various phonemes and sounds, including those in dead languages. Designed for researchers of the paranormal.
Does not contain whole words, numbers, sentences of syllables.
Keep in mind that what you may consider nonsense may simply be words in another language, because the spirit does not have to speak exactly in the language that you speak.