A voice may drop octaves.Logical formLearned from7 sentences. Some octaves can be higher.Logical formLearned from6 sentences. A range can be constituted-of-or-filled-with octaves.Logical formLearned from6 sentences. A voice may raise some octaves.Logical formLearned from6 sentences. Octaves can be bare.Logical formLearned from5 sentences. A vocal range can be octaves.Logical formLearned from5 sentences. Octaves can be in a bass.Logical formLearned from5 sentences. A person may turn on some (octave high pass filter).Logical formLearned from5 sentences. Octaves may pertain-to an acoustic bass.Logical formLearned from5 sentences. Some octaves can be constituted-of-or-filled-with handbells.Logical formLearned from5 sentences. Some octaves can be constituted-of-or-filled-with sound.Logical formLearned from5 sentences. Octaves may undergo a use.Logical formLearned from4 sentences. Octaves may have size.Logical formLearned from4 sentences. A total can be constituted-of-or-filled-with some octaves.Logical formLearned from4 sentences. A vocal range may span some octaves.Logical formLearned from4 sentences.