I believe that an easier way to understand this is to say that a major interval inverted becomes minor but a perfect interval inverted is still perfect. What you said is accurate but harder for me to grasp. Norm Barrett Mike Lafleur wrote: > To paraphrase John W. Travis in "Let's Tune Up," p. 118: > > A Major interval is an interval in which the upper tone is in the scale > of the lower tone. While the fourth and the fifth fall into that > category, the lower tones of those intervals are also in the scale of > the upper tones, and the intervals are therefore called perfect. This > does not apply to the other major intervals. > > I hope this is accurate and answers your question. It is something I (a > dabbler in music and tuning) have recently learned. > > > Rogerio Cunha wrote: > > > > To the list > > > > I would like to receive an explanation of why the 4ths and 5ths > > intervals they are not major or minor and are . > > I read something about few time ago but now I don't remember where I > > did. > > Thanks to all > > > > Rogerio Cunha > > IC Member of the Guild > > rogeriocunha@openlink.com.br > > rogerio@airandinas.com
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