Not known Details About matangi mantra
ॐ शुक्रप्रियायै विद्महे श्रीकामेश्वर्यै धीमहि तन्नः श्यामा प्रचोदयात्॥Madhyama is listened astrally (this mantra is staying listened even exterior) plus the deity related is Chinnamastadevi.If you simply give oneself to that