SouthPark the "diminished" part of "diminished third" has a meaning. Someone posted a link with a very good explanation.

I find it hard to understand why you keep arguing your (incorrect) point if you don't have any music theory background. It's like my dad arguing with my sister about a chemistry thing because "my intuition says blah blah blah". She has a Ph.D. in chemistry. If you don't understand, then it's best to just let it lie, or even better, study the subject until you understand it! But don't keep arguing with everyone with totally wrong information and expect that someone will be won over.

      twocats Nope ... the point is ... I pointed out that the guy in the vid incorrectly wrote and said that the interval is a third. It is not a third obviously. And diretonic wrote that the source is correct. And the source and diretonic and tc3 are all incorrect.

      On the contrary. It's you that didn't understand the situation, and then decided to conjure up something about me not knowing theory.

      I see what's happening now. You failed to understand that the discussion was actually about the mistake the guy made ... where he mistakenly told people that the interval is still a third. And indeed it is not a third.

      It's actually possible that you don't understand that a diminished third is not a third of any kind in the scale system we're using ... the major/minor scale. That is ... you're the one that doesn't understand something here. And yet, you're firing disrespectful shots when it's you that hasn't even understood the situation ... not a good habit.

      I will write this ... if you diminish a third ... then the result of that operation requires a name ... such as 'diminished third'. It's no longer a third at all. The name 'diminished third' does not mean it is still a third of 'some' or any kind.

      I will also write ... those geniuses that make up the theory reckon that the diminished third is an operation on a minor third. Specifically the operation reduces a minor third interval by one semitone. Equivalently .... it probably could also be considered as reducing a major third interval by two semitones.

        Hi Southpark

        Another way to think of it (in my simplistic way) is it's equivalent to double sharps and double flats. Why do we call any note a double sharp/flat? F## is actually a G. Ebb is actually a D etc etc. But of course we do have double sharps and double flats to make sense when writing music sometimes.

        It's a similar logic with diminished 3rds.
        Diretonic is a very knowledgeable chap, and you only have to look it up on-line to find out that he's right.

        Of course you call it whatever you like, but it is a diminished 3rd.

        The joy of music theory 🙂

        Cheers


        Simon
        All round average Jazz, Blues & Rock player.
        Currently working towards ABRSM grade 8.

          SouthPark That's why they shutted up and didn't say a word after realising they're wrong.

          No, it's because there's no point in explaining it to you. I'm shutting up, too 🙄

            SouthPark

            Maybe it's a good idea to leave a conversation for a while when you feel frustrated or angry. When you keep writing when you feel like that there is a chance you are starting to write things that are not very nice. And I think that just happened.

                Josephine I wasn't frustrated. I didn't start it.

                Make sure to notice how that started. It was someone else.

                But good point made ... it's better that I don't get drawn into being set up. You can see what was happening.

                twocats not sure why you're insisting on incorrectly explaining music theory if you don't know music theory?

                    Simonb Of course you call it whatever you like, but it is a diminished 3rd.

                    The main thing is ... a diminished third is not a third of any sort.

                    Simonb Diretonic is a very knowledgeable chap

                    He is indeed. But he's incorrect in this particular case.

                        Simonb Another way to think of it (in my simplistic way) is it's equivalent to double sharps and double flats. Why do we call any note a double sharp/flat? F## is actually a G. Ebb is actually a D etc etc. But of course we do have double sharps and double flats to make sense when writing music sometimes.

                        I like this analogy. I know nothing about music theory, so I googled. One particular answer on Quora by Allen Bachelder makes a whole lot of sense to me.

                        The gist is "third" refers to all intervals that the two written note letters (e.g. C-E) has one more note letter (e.g. D) between them. So, any permutation of C-E, no matter how many sharps or flats are added, are all thirds. For example, Cb-E, Cb-E#, C-Eb, C#-Eb, Cb-Eb, and even to the extreme C##-Ebb!

                        Along the same logic, anything C-D is "second", like C#-D# (which is enharmonic to the diminished third C#-Eb).

                        I have no proof this is correct. But if Allen Bachelder is who as his signatures claims with a doctorate from Eastman School of Music, and says that the rule outlined above is how you pass the theory exam there, then I think it's pretty convincing.

                            SouthPark Diretonic and tc3 already know that they're wrong. That's why they shutted up and didn't say a word after realising they're wrong.

                            I hadn’t ‘shutted up’. I’d hoped you would do some research and understand your error.

                            Ultimately, as Simon has pointed out, it will make no difference to you or the kind of music you make if you name a diminished third incorrectly. You can happily develop a home-spun theory of your own, neither you nor your music will come to any harm. But a serious student participating in this forum could carry forward your mistake and fail a question in an important examination.

                            The pity is you’ve dug yourself so deep in your error you’ve persuaded yourself to dig deeper. So please, make an effort to stop. Understand the notion of ‘received opinion’ and refrain from corrupting accepted theory. (Perhaps at this point the thread could be locked to prevent your further confusion?)

                                iternabe
                                Hi
                                Yes, I was going to post something similar.
                                I think this is correct, but I'm sure there are better qualified people than me who'll confirm it.

                                I've studied theory academically at a high level (equiv to honours degree), but it was quite a long time ago now, and unless you keep using it you tend to forget it. Especially as you get older!

                                Cheers

                                Simon
                                All round average Jazz, Blues & Rock player.
                                Currently working towards ABRSM grade 8.

                                  diretonic You're the one that failed. Just to confirm .... you reckon that the interval formed by C# and E-flat belongs in the category of a 'third', right? And you think that this particular kind of 'third' is classified as a 'diminished third', right?

                                  It is you that needs to do research and understand your mistake.

                                    diretonic I just saw SouthPark's comment quoted in your post. I have them on ignore, so I haven't seen any of their responses, and don't intend to.

                                    Enthusiastic but mediocre amateur.

                                        TC3 I just saw SouthPark's comment quoted in your post. I have them on ignore, so I haven't seen any of their responses, and don't intend to.

                                        TC3, what a good idea. By responding to his nonsense I realise I'm an accomplice to the crime....now where's that ignore button....

                                          Yep ... that would be about right. If you were 100% confident that you are right, then you would have shown formal theory ... from text books, official music theory documents etc by now.

                                          Basically ... you thought you understood what a diminished third (interval) is ... but you didn't realise that it is not a 'third' (interval) of any sort at all. It is a result of carrying out a semitone reduction operation on a minor third, resulting in a major second interval.

                                          And the name 'diminished third' does not mean that it is in the category of a 'third'.

                                          The word 'diminished' only signifies the operation carried out on a minor third interval to form a different interval. The result (outcome) being a 'major second' interval, but is equivalent to the defined 'diminished third' interval.

                                          Keeping in mind that the name 'diminished third' is an interval equivalent to a 'major second' (interval). But the word 'third' in 'diminished third' absolutely does not mean that the diminished third interval is a 'third' (of any kind). It is absolutely not a 'third' (of any variety).

                                            SouthPark I was not trying to be mean and I apologize if it came off that way. But please think about the likelihood of you being correct when everyone else is disagreeing with you, including people who have studied theory at a high level.

                                            I'm going to put you on Ignore for my own peace of mind. Your attitude reminds me of my dad, who was a brilliant man who thought that his opinion was worth more than everyone else's, even if he knew nothing about the subject. There's just no point in having a discussion.

                                                twocats But please think about the likelihood of you being correct when everyone else is disagreeing with you, including people who have studied theory at a high level.

                                                For other aspects of music theory, there can be uncertainty. But the probability of me being wrong in this particular aspect (topic) of 'diminished third' is zero.

                                                With the major and minor scale ... once you 'diminish' a minor third, the resulting interval will be no longer a 'third' (of any kind), even though they/we/you call it a diminished third.

                                                That name (diminished third) is only due to the operation that was/is carried out/applied. It does not mean that a 'diminished third' interval is another 'class' (or incarnation or realisation or type or kind etc) of a 'third interval'.

                                                The rest of your post ... due to the particular 'veil' (ie. V.I.) tactics you're using ... well ...... I'm not going to 'go there'.

                                                For records - the origins of the 'not a third of any sort' (theory discussion) is from this - LINK related to POST.

                                                  I generally have precious little knowledge about music theory, but I found the article at the below link to be an interesting read:

                                                  https://music.stackexchange.com/questions/105433/whats-the-reason-for-naming-major-second-a-diminished-third

                                                  One of the authors appears to suggest that it depends on the context of sheet music whether an interval is shown as a diminished third or as a major second. Please note here that the emphasis is not on whether it IS a major second or it IS a diminished third (I think the author recognizes the enharmonic equivalency), but instead how either of them is SHOWN in sheet music notation.

                                                  I think in case of Aron Bernstein's "Intervals Part 2" video at 53 seconds, Aron explains the convention how to show a third in music notation, and that one can modify the third from major to minor to diminished by adding music notation (sharp/flat). And I understand from Wiki (Diminished Third) that in 12-tone equal temperament, a diminished third is enharmonic with the major second. But since the video at 53 seconds does not specifically focus on music context, the question does not arise which enharmonic notation representation (diminished third or major second) Aron should/could have shown. The presentation at that point focuses on third intervals, and consistent with that he shows the notation representation of a third with added sharp/flat to arrive at diminished third, major third, and minor third. I think Aron did not intent to talk about a second interval at that moment, so he opted not to mention at that time that a diminished third is enharmonic to a major second, and consequently did not use the notation representation for a major second.

                                                  That's just my 2 cents. All the best.

                                                  Thanks for posting MandM. I don't have a problem with the names 'diminished third' and 'major second' (intervals) being equivalent/enharmonic etc.

                                                  I'm just pointing out to diretonic, twocats and tc3 that a 'diminished third' isn't actually a 'third' (or is no longer a 'third') once we lop off a semitone from a minor third interval. (or equivalently lopping off two semitones from a major third interval).

                                                  Major and minor intervals are based on note spans and/or counting degree (relative to a reference note). Once a diminishing is carried out on a 'third' (eg. on a minor third) - the result is no longer going to be a 'third' of any kind.

                                                  The name 'diminished third' is actually meaning we cut down a minor third interval to create another interval, which somebody had to give a name for -- and that name turned out be 'diminished third'. It is not actually a type of 'third' (interval). It pertains to an operation applied to a particular kind of 'third' (eg. the minor third). After the operation, we end up with a chosen name that tells us what operation was done on something (or equivalently - the result of the operation with the operation name) - ie. the diminishing of cutting down of something - leading to the name 'diminished third' (interval). And that interval is not a type of 'third'.

                                                    SouthPark I hear you, or at least I know where you are coming from. You are pointing out that the below (a diminished third) has only 2 steps, so why would it be referred to as a type of third interval.

                                                    I think the others know that the diminished third has only 2 steps, but I think they want to point out that there is value/reason why a 2-step interval is sometimes shown in sheet music in diminished third notation, and then referred to as a "third" (diminished).

                                                    Some of my background is in programming, so here is a (not quite fitting, but the best that I can do for now) example:

                                                    The mathematical term (3-1) = ? You say why would it not be 2 ? It's clearly a 2, no ? Let's not call it 3, or anything else.

                                                    However, there may be benefits in calling the result still a "3" but with a modifier added. Maybe call the modifier "minus" where it is understood that minus refers to "-1". What could be the benefit ? Maybe keeping the term a "3" simplifies programming, variable labeling, relative offset, or something to that effect.

                                                    So, that is why I do not mind so much that a 2-step interval, in certain situations, is being referred to and shown as diminished third. I trust that there are benefits in music why this methodology was kept. Wish you a good weekend.

                                                        SouthPark here was one thing I detected in the Intervals Part 2 lessons after going to that link -- is a mistake/error in the lesson. At 53 seconds, the interval C# and E-flat is a 'second' (major second). The teacher told people that it is still a third. Also noticed that the Part 1 intervals lessons doesn't cover black coloured notes

                                                        I don't have time atm to watch the video. However, C# to Eb is indeed a 3rd, not a 2nd. Several ways to get there:

                                                        CE = M3
                                                        C Eb = m3

                                                        C# Eb = dim3

                                                        or ....
                                                        C# E# = M3
                                                        C# E = m3
                                                        C# Eb = dim3

                                                        check: dim3 is enharmonic equivalent of M2 (the part you discovered)

                                                        Edit: I have no idea why that one line comes out bold and huge. I'm not shouting - it's the software.

                                                        Edit 2: I now see there's a whole discussion about this. For anyone who is starting to learn, trust me: the teacher is correct, that that is a dim3.