dˌɪstɹɪbjˈuːʃən ʌv spˈɛlɪŋz wɪð sˈɪŋɡəl ænd dʒˈɛmᵻnˌeɪɾᵻd kˈɑːnsənənts ɪnðɪ ˈoʊldɪst ɛkstˈænt mˈɑːnjuːmənts ˈɪndᵻkˌeɪts ðætðə ɹˈiːflɛksᵻz ʌv pɹˈoʊɾoʊˈɪndoʊjˌʊɹɹəpˈiən vˈɔɪsləs stˈɑːps wɜː spˈɛld æz dˈʌbəl kˈɑːnsənənts ænd ðə ɹˈiːflɛksᵻz ʌv pˌiːˌaɪˈiː vˈɔɪst stˈɑːps æz sˈɪŋɡəl kˈɑːnsənənts.
Distribution of spellings with single and geminated consonants in the oldest extant monuments indicates that the reflexes of Proto-Indo-European voiceless stops were spelled as double consonants and the reflexes of PIE voiced stops as single consonants.