Download MP3 The Sound of Oi/Oy - Vowel Diphthong 'oi/oy' / Long Vowel 'oi/oy' - English4abc - Phonics song Download MP4 The Sound of Oi/Oy - Vowel Diphthong 'oi/oy' / Long Vowel 'oi/oy' - English4abc - Phonics song