Many brass teachers and players in the know about embouchure types will talk about the typical differences in tone between players belonging to different embouchure types, including me. For example, “Low Placement” upstream players tend to have a brighter tone than “Medium High Placement” embouchure type players. But while I think these tendencies have some validity, I think there’s enough variation among individuals belonging to the same embouchure type that you would never want to type someone based on sound alone.
Apparently, Donald Reinhardt claimed that he could tell a player’s embouchure type merely by hearing him or her play. Frankly, I doubt that anyone can do this, but I suppose if anyone could it would have been him. I think a player’s tone can be a clue, but certainly isn’t definitive.
I was curious about this, so I grabbed several audio clips from one of my old embouchure research projects and ran them through Audacity to look at the spectrograph. Here are 6 trumpet players.
Let’s take a look at some trombonists next.
Since I know which player belongs to which embouchure type, it’s easy for me to look and listen to them and think that I’m seeing and hearing a difference. Two of the above trumpet players stand out in particular to me in their spectrograph as being similar, but it might just because I’m looking for a pattern to fit what I already happen to know.
Unfortunately, what I’ve done isn’t going to be a very scientific way of determining a difference in tone between players of different types. I did record them all using the same equipment, but these were in different locations, which is going to affect what the mic is picking up. I didn’t control for how far away the camera/mic was from the player or even if the player was facing towards the mic or towards the side. Some of the players are playing starting on a different note, ascending first or descending first, etc.
In other words, this doesn’t prove anything.
I’d like to hear what you think. Assuming you’re already familiar with the basic brass embouchure types, what is your guess for each player based on the audio file and spectrograph? If you’re using Reinhardt’s embouchure types, all of these players fit IIIA, IIIB, and IV/IVA.
When you’ve left your guess in the comments, you can go here to see the answers.
Here’s a great arrangement and performance of Chega de Saudade by Rafael Rocha and the T-Bones Brazil Ensemble. Rocha plays the solo and wrote the arrangement. While you’re watching it take a close look at Rocha’s embouchure and play “guess the embouchure type.” My guess is after the page break.
I had previously posted Lloyd Leno’s film, “Lip Vibration of Trombone Embouchures” on YouTube and wrote about it here, but at the time YouTube was restricting the length of videos. I broke up the film into three parts in order to get it onto YouTube in its entirety.
I’ve finally gotten around to uploading the entire film in one part. Here it is.
Here’s a pretty neat short video of the Salaputia Brass Ensemble performing the movement “EWAME” from the new album “Sounds of Evolution.” They are all playing into mouthpieces that have cameras installed in them, so that you can see the view of their embouchure inside the mouthpiece while performing. Take a look at them and see if you can guess all of their embouchure types. My guesses will be after the break.
Because we’re only able to get an accurate look at which lip predominates, we’re not going to be able to note the musicians’ embouchure motion, but we can tell the player’s air stream direction. Starting from the upper left and moving across each row here are my guesses.
After over 10 years of blogging I figured that I had already covered this very common embouchure issue in its own post, but after wanting to help out a teacher with some questions about it I searched and realized that I’ve only discussed the smile embouchure in the context other topics. In this post I’m going to dig into the smile embouchure and go over some common suggestions for eliminating it that I think are inefficient before I go over what I’ve found to be the best approach. If you want to skip all that, check out this post on free buzzing.
Around the turn of the last century it was apparently common for brass teachers to actually instruct students to ascend by pulling the mouth corners back into a smile. It works, to a degree, similar to the way that stretching a rubber band while you pluck it will cause the band to vibrate faster and therefore sound a higher pitch. This technique has a characteristic look.
Today this technique is almost universally rejected by brass teachers. It tends to limit the upper register and endurance. Pulling the mouth corners back to ascend eventually reaches a limit to where the musician simply can’t smile even further to ascend, resulting in a range cap. Stretching the lips back also makes the lips more sensitive to mouthpiece pressure. This results in difficulty with endurance and also simply risks injury due to mouthpiece pressure.
While brass pedagogy seems to have come to a general consensus on avoiding the smile embouchure, we don’t have an agreement on the best way to help students make corrections to the smile embouchure. Part of this disagreement is due to every student being a little different and responding to instructions in their own ways, but a large part of the disparity in instruction seems to be due to a general lack of knowledge about what’s happening in the embouchure in the first place.
Awareness and Conscious Effort Is Inefficient
If you’ve never struggled with the smile embouchure yourself it might seem that the best way to eliminate the smile embouchure is to help your student become aware of the problem and ask him or her to consciously stop it. Mirror observation is often used for feedback and brass teachers will often prescribe exercises that start in the range where the corners are not pulling back and ascend gradually into the trouble range. The idea here is to start from a point of good technique (mouth corners in place) and strive to keep that technique the same while ascending.
This usually doesn’t work, at least not very efficiently. It’s notoriously difficult for brass players to make this sort of adjustment for a couple of reason. First, these musicians have a “conditioned response” to ascending on their instrument. It’s simply too habitual for them to just stop. Secondly, and even more relevant, the muscles at and around the mouth corners are usually too weak to hold them in place while ascending.
It’s pretty well established now that the area around mouth corners are responsible for a lot of the muscular effort for a well-formed brass embouchure. There have been studies that empirically investigate which muscles in the embouchure are active while playing a brass instrument. The more advanced the player, the more focused the embouchure effort is on keeping the corners firm (and the chin flat). The advanced trumpet player in the image above (the top row) shows a much more focused muscular effort at the mouth corners (and chin) than the beginner (middle row) and trumpet student (bottom row).
One reason why it’s so difficult for brass students to eliminate the smile embouchure is because the muscles that should be holding the mouth corners in place are too weak. Just as you can’t expect someone to bench press 200 pounds without building up to it, a brass musician can’t hold their mouth corners in place without developing the strength to hold them in position.
Embouchure Problems Are Embouchure Problems – QED
One of the most common approaches I come across from teachers, who I feel should know better, promote the idea the all embouchure problems are really breathing problems. These teachers insist that the best way to help a student make corrections to a smile embouchure are to work on breathing. Many also emphasize assignments of music, rather than technical exercises.
While there’s nothing inherently wrong in teaching good breathing and musical expression, any smile embouchure correction that happens as a result here is largely going to be in spite of, rather than because of the focus on breathing. Don’t misunderstand what I’m pointing out. Excellent brass technique requires efficient breathing and musical expression, but embouchure problems are embouchure problems. Teachers who advocate for developing embouchure technique purely through good breathing and musical expression usually insist that it’s ultimately better to take a student’s attention away from their embouchure. That may be all well and good, depending on the student, but in the process they ignore what the real cause and effect of the smile embouchure actually is. In this case, I think advocating that the teacher have a good understanding of embouchure technique here is different from discussing how much of that to communicate to students and when.
In a little bit I’ll show you how you can get a student to stop pulling the mouth corners back into a smile while forming an embouchure almost immediately (with some qualifications). I have never seen working on breathing to help a student correct a smile embouchure as immediately. If fixing the breathing fixes any “embouchure problem” immediately then the original issue was misdiagnosed. Embouchure problems are embouchure problems – by definition.
Sure, working on breathing and musical expression can (eventually) result in a brass musician correcting the smile embouchure. However, this is because the student is developing embouchure strength and control over time from practicing the instrument, not because the breathing is better or the musician’s mental image of the music is in mind. Furthermore, some players who happen to be more prone to a smile embouchure appear to have difficulty building embouchure strength simply by playing a lot (see Low Placement embouchure type players), at least more so compared to peers who have different anatomical features.
In my experience, regular free buzzing practice is the fastest and most efficient route to eliminating the smile embouchure, for a number of reasons. While I go over my rational, it’s important that I specify how I teach free buzzing and address some common concerns about it.
There are many brass players and teachers who dismiss free buzzing because it doesn’t directly relate to how the instrument is played. This is true, but if you are careful and methodical about your approach you are actually exploiting this difference. Consider the “conditioned response” difficulties I mentioned above.
For advocates of fixing the smile embouchure with breathing and musical expression, my rational for addressing it instead with free buzzing should be already familiar to them.
For example, in order to change the preconditioned responses elicited in a student when playing his or her instrument, Mr. Jacobs will simply remove the musical instrument and have the student blow on the back of the hand, buzz on a mouthpiece, or breathe into a strange apparatus. By conditioning the correct response away from the horn, it is then transferable to the instrument. This offers the additional benefits of keeping exercises from dulling musical passion, enhancing strangeness, allowing a multi-sensoral approach, and avoiding previously conditioned baggage. Most importantly, this additive approach keeps players from having to go back to square one on their instruments-particularly valuable for professional players who must maintain a busy schedule. Thus instead of altering a bad behavior, Mr Jacobs advocates that one simply learn a new correct behavior to supplant it by changing stimuli and eventually transferring the response back to the horn. Meanwhile, the old, undesired behavior will extinguish itself from lack of use.
When a student has developed a habitual way of playing the instrument that is getting in their way, it’s very difficult to approach it from what they are doing wrong. Instead, it’s more effective to go after what to do correctly. Furthermore, crafty teachers like Arnold Jacobs used ways to remove the trigger for the conditioned response (the instrument) and make corrections where those bad habits didn’t come into play. As the proper technique became learned, the instrument was gradually added to the mix.
Free buzzing does exactly this, with the added benefit of actually building strength in the muscles that hold the mouth corners in place. Furthermore, free buzzing higher pitches softly and with a mosquito-like sound makes it virtually impossible to pull the mouth corners back into a smile. Instead of helping to raise the pitch, it hinders it. While free buzzing the brass musician has to keep the corners locked in place.
So to return to what I wrote above, it instantly fixes the smile embouchure, albeit in a different context. It introduces “strangeness” removing the conditioned response. Even better, where playing the instrument allows the student to pull the corners back to ascend before the range caps, free buzzing only reinforces the correct mouth corner position. For these reasons, I feel that using free buzzing to eliminate a student’s smile embouchure is superior to addressing it directly while playing or through breathing and musical expression.
How to Free Buzz
My personal favorite free buzzing exercise to teach is from Donald Reinhardt. He prescribed slightly rolling in the lower lip inward and just over the lower teeth while bringing the top lip down to lightly touching the lower lip.
Without any assistance from the mouthpiece or the instrument, form the lips in the prescribed manner and sustain a buzz on middle concert B flat to the fullest extent of a normal playing breath. . . Buzz and inhale three times in the prescribed manner and strive to make each buzz a higher pitch than the previous one – then rest.
Encyclopedia of the Pivot System, p. 169, by Donald Reinhardt
That’s it. Maybe 3-5 minutes at most. Done as described and with just a little bit of work daily spread out over several weeks it should make for noticeable improvements without the risk of feeling “muscle bound” or otherwise screwing up a brass musician’s chops.
As an aside, I edited out the part where Reinhardt instructs holding your finger over your lips when inhaling and breathing in through the mouth corners for clarity here, but I do teach and recommend that in my more detailed discussion and video of this exercise. I also want to point out that the free buzz should be soft and thin sounding. Try to make it sound like a mosquito buzz.
That one exercise done daily for a few weeks or so should translate into a reduction of the smile embouchure at least, and over time can even eliminate it by itself. If your student needs some more help, there are two additional ideas you can try with free buzzing. One can be helpful for pretty much all players, others require you to know and understand the student’s basic embouchure type. These are also based on (if not outright taken from) exercises I picked up from Reinhardt’s writings.
Using Reinhardt’s description of a free buzz above, instruct your student to free buzz a pitch that is at least F below middle C (concert pitch, in other words F3 or F inside the bass clef). Keep the free buzzing tone soft and mosquito-like. After free buzzing that pitch, have the student play the pitch on their instrument as a long tone, then stop and rest. Then buzz pitches up a scale and repeat this exercise until they start feeling fatigued. Observe how the mouth corners look, but it’s not necessary to have the student watch in a mirror unless it helps then to see it (another option is to have the student watch in the mirror every other pitch). This exercise, which I feel is good for any brass player, can help eliminate the smile embouchure by helping the student to experience the correct mouth corner position while free buzzing and then quickly try to translate that to the instrument.
If the student is one of the downstream embouchure types, particularly the Very High Placement type, you can take the above exercise but instead of free buzzing and then playing the pitch on the instrument next, have him or her free buzz into the instrument. For some downstream embouchure type players this can be an excellent way to fine tune other elements of embouchure form as well as the mouth corner position. Low Placement/upstream type brass player will not want to practice buzzing into the instrument, since their mouthpiece placement too drastically changes certain elements of their embouchure form while playing compared to free buzzing.
Free buzzing ticks off all the boxes that we know is effective for correcting instrumental technique. It specifically strengthens the muscles we want. It forces the brass musician’s mouth corner form towards the habit we’re trying to develop while also removing the trigger for the habit we’re trying to eliminate. Lastly, it’s effective over time, but it’s probably more efficient than any other common approach to correcting the smile embouchure.
Remember, keep your student’s free buzzing light, soft, and somewhat airy sounding. A little bit every day spread out over time is much better than a lot at once.
One final idea for those teachers who insist that everything their student works on should have musical value. Use the same described procedure for free buzzing (soft and thin sounding, keep it above F3, etc.) but free buzz simple tunes. Personally, I think it’s fine to work on instrumental technique by removing it from a musical context at times, but if your student has difficulty switching focus back on the music or slips too easily into trying to multitask while playing, free buzzing melodies has the same benefits.
Donald Reinhardt created an exercise he called the “Pivot Stabilizer.” He intended students to use this exercise as their first notes of the day. Here is the exercise, with some hand written notes and instructions for a specific trumpet student.
In order to better understand this exercise you first should forget about the embouchure “pivot.” Reinhardt defined it a certain way, but unless you studied it from him you almost certainly don’t understand what it is. Instead, think of this as an exercise to stabilize a brass musician’s “embouchure motion.”
Embouchure Motion – The natural motion a brass player makes when changing registers where the mouthpiece and lips together will be pushed and pulled along the teeth and gums in a generally up and down motion. The position of the mouthpiece on the lips doesn’t change, just the relationship of the mouthpiece rim and lips to the teeth and gums. Some players will push upward to ascend while others will pull down. Some players will have a track of their embouchure motion that is side to side. For more details on this phenomenon go here.
Assuming that you fully understand the embouchure motion definition above, you can make use of Reinhardt’s exercise to help make a student’s embouchure motion function more efficiently with less conscious effort. The arrows drawn into the music above are a specific trumpet student’s embouchure motion direction, just make sure that you’re instructing (or using, if this is for your own practice) the correct embouchure motion for the individual student. The student should use this exercise as a way to find where the tone is most open and resonant for each particular note.
The first time through each three measure set the student should watch what the embouchure motion looks like in a mirror. On the repeat Reinhardt instructed the student to close his or her eyes and instead focus on the feel of the embouchure motion assisting with the slurs. The “V” after each set was Reinhardt’s notion to remove the mouthpiece from the lips for a moment before moving on to the next set.
One thing I wanted to adjust for this exercise was the starting note and where the “home base” range for this exercise lies. For many students, particularly the Very High Placement and Low Placement embouchure types, it can be more useful to use a higher pitch as the central range point. Many of these musicians will find it easier to play correctly in their upper register, so slurring up to the high range before playing down to their low range gives them a better chance to descend correctly (as opposed to slurring down to the low range before up to the high range, as Reinhardt’s original exercise).
The above exercise duplicates the purpose of Reinhardt’s “Pivot Stabilizer” but moves the center of the exercise to G on top of the staff (for trumpet) and also has the student playing an ascending slur first, before descending to low C.
If you want to experiment with your own practice or teaching using these exercises here are some printable files for you.
I’m overdo for another “Guess the Embouchure Type” post. This one is actually quite challenging. Take a look at Sergei Nakariakov performing Carnival of Venice and see if you can guess his embouchure type.
It’s been a while since I’ve done a “Guess the Embouchure Type,” so I’m way overdue. Here is a video of the Cannonball Adderley Quintet playing Work Song. Nat Adderley’s solo starts at 2:39 if you want to skip straight to that. Although the video resolution is pretty low, I think you can a close enough look at Nat’s chops that you can make a fairly accurate guess as to his basic embouchure type. My guess after the break.
The following rant was inspired by a Trombone Pedagogy Facebook group thread started by a teacher who was wondering how to help a young student who was playing with his lower lip predominant. The teacher was asking for advice on how to correct this embouchure. My rant below is in response to many of the ensuing comments. I will be paraphrasing instead of directly quoting, in part because these responses are so common and don’t really need an attribution for context.
First, a little background on what an upstream embouchure is. All brass musicians, regardless of what they might think they are doing or should be doing, play in such a way that one lip or another predominates inside the mouthpiece. When the upper lip is predominant, most common, the air stream passes the lips in a downward direction.
Most brass players have an embouchure that is similar, although the amount of upper to lower lip may be different. A minority of brass musicians, however, do the opposite. These players place the mouthpiece closer to the chin and because of the predominance of lower lip the air stream gets directed upwards.
With that basic understanding out of the way, I will get into addressing some of these typical comments.
Change the mouthpiece placement. That student will thank you for it later.
While it does happen that students will adopt an upstream embouchure when they should be playing downstream, it’s much more common for these “low placement embouchure type” players to be playing that way because it is the most efficient embouchure type for their anatomical features. Before you change the mouthpiece placement you need to address issues with embouchure form, breathing, tonguing, posture, etc. Usually if you correct those other playing characteristics the embouchure will function better.
Sometimes you can disguise those other issues by changing the mouthpiece placement, but that’s only covering up the real problems the student is having. Before the embouchure form is developed properly, for example, you just can’t tell where the best mouthpiece placement is for a particular student.
That student should try another instrument instead. Has he/she considered a woodwind instrument or vocals?
I tend to avoid encouraging a student to change to a different instrument if they’ve expressed an interest in their brass instrument. Sure, maybe some folks will take to another instrument and never look back, but that’s a solution in search of a problem. If you need more bass clarinetists in your band be honest about why you are encouraging the change. If you’re suggesting the change because you don’t know how to help that student, then do some homework and learn. This is your responsibility as a teacher (or even as someone giving advice on the internet). Ask questions. That’s what the Facebook Trombone Pedagogy group is for!
Upstream players are players who have a protruded lower jaw or an underbite. That’s what makes them upstream.
Players with an underbite almost always play better with an upstream embouchure, but that alone isn’t going to make their embouchure upstream. There must be more lower lip inside the mouthpiece in order for their embouchure to function upstream (Caveat – Sometimes lip texture comes into play. It’s rare, but you might look at an embouchure from the outside and think it’s one direction but when you look on a transparent mouthpiece the lip position seem flipped. My feeling is that moving the mouthpiece placement to a more appropriate placement can often help).
I don’t have a way to post the video clip (nor have I obtained permission), but my teacher, Doug Elliott, made a film in the 1980s called The Brass Player’s Embouchure. In this film he shows a trombonist with an underbite, but with a mouthpiece placement that was close to the nose and it function downstream. Moving this player’s mouthpiece placement so that it had more lower lip inside worked better.
And not all upstream players will have a protruded jaw position anyway.
Look again at the downstream embouchure example I posted above and note his jaw position. Jaw position while playing will be an influence, but doesn’t actually make a player upstream or downstream.
Also worth considering are Donald Reinhardt’s embouchure types. While I prefer to teach and communicate using different terminology, he did make note of players with particular jaw positions while at rest compared to playing. For example, he classified players with a natural, even bite.
Such brass musicians will almost always need to place the mouthpiece either very high (close to the nose, downstream) or very low (close to the chin, upstream). It might go either way, and for players like this it is sometimes quite difficult to tell which way it might go. Even if that is a very accomplished brass musician (read through what Brad Goode has written about figuring out his embouchure type).
That’s an [insert one brass instrument type here] thing. Those of us who play [insert other brass instrument type here] can’t/shouldn’t play upstream.
After 20 years of studying brass embouchures on all instruments intensively, I’ve come to the conclusion that while there are some differences that the size of the mouthpiece causes, it’s only a matter of scale and that the same embouchure characteristics are found on all the brass instruments.
Now it’s easier to find examples with trumpet players for a couple of reasons. Consider that the larger the mouthpiece, the more likely that the chin or nose will get in the way of placing very high or very low. A trumpet mouthpiece, on the other hand, allows much more leeway for getting the most efficient ratio of upper to lower lip for the particular player. That said, horn players are much less varied, which I believe is due to the adherence of a particular pedagogue’s advice as well as a comparative lack of players who are self taught and simply do what works instead of what is commonly taught.
That’s an [insert musical style] thing. It won’t work for [insert another musical style].
It’s only good for [high or low register playing]. It won’t work for [low or high register playing].
Embouchure type is influenced by the musician’s anatomical features, not playing style, instrument choice, or musical genre.
When you place the mouthpiece with so much rim contact on the upper lip, it isn’t free to vibrate and causes problems.
Both lips do vibrate in conjunction, but they do not vibrate with equal intensity. The predominant lip inside the mouthpiece vibrates with greater intensity. Brass embouchures appear to be sort of between a double reed phenomenon, where both reeds vibrate with equal intensity, and a clarinet reed, where the reed vibrates against the surface of the mouthpiece. For a brass embouchure to function efficiently the lip that has more rim contact (the upper lip in the case of the upstream brass musician) will function somewhat like the clarinet mouthpiece while the other lip (lower lip for upstream embouchures) is more like the reed.
This isn’t arm chair speculation. You can see it in Lloyd Leno’s film quite easily. Here’s part 1 of 3, but the link is to the entire playlist.
If you watch the entire film you’ll also be able to note some downstream trombonists in the film who place the mouthpiece with a great deal of rim contact on the lower lip. For some reason this isn’t as widely discouraged, even by the same players who make this argument when it concerns an upstream embouchure.
I am an experienced teacher and performer and I have never come across a successful upstream player.
My first response to this is that you’re probably not qualified (yet!) to identify one when you see it. Furthermore, if you don’t consider embouchure types to be a useful pedagogical tool, then you’re simply not going to look for them – even if you know what to look for. So many teachers seem to think that by watching a player blow air, free buzz, mouthpiece buzz, talk, whatever, that you’re going to be able to determine a player’s embouchure type. You can’t. Or at least I can’t and I doubt you can.
I’ve gotten to the point where I don’t need a transparent mouthpiece to type most players’ embouchures, but I know the limitations of this and will grab a transparent mouthpiece when needed. Simply put, the most accurate method of typing a brass musician’s embouchure is to look at how they play while playing the instrument into a transparent mouthpiece. Rim visualizers can give you important clues, but the lack of resistance and the reflection of the standing wave back to the lips (as well as other factors) come into play and make a rim visualizer less accurate.
To my knowledge, no one has yet conducted a robust enough study to determine the percentage of upstream players, but by my best guess I would say around 10%-15%. That’s a sizable enough minority that anyone who takes the time to actually look for upstream players among your students and performing colleagues will find them. If you’re not seeing them, you’re probably not looking.
That said, an awful lot of teachers who should know better make a big deal about “correcting” an upstream embouchure when they see one. I get emails and private messages all the time from folks describing this situation. Particularly for teachers who work with older students you’re going to find fewer upstream students because they get “weeded out” by well-intentioned, but ignorant teachers. Either those students quit brass out of frustration or they play with less success than they could because they had their embouchure changed to a less efficient one. I’m a good example of the later, although I was never changed to downstream. I was instructed from the get go to play downstream. Which leads to:
We should teach what’s most common because that will have the best chance of success.
There is some logic to this, but in the case of mouthpiece placement I don’t even think we should talk about it with beginners. Teach embouchure form, not mouthpiece placement, and most of the time I’ve found the student will naturally gravitate to the best embouchure type for his or her anatomy. When it doesn’t, then it’s time to intervene, but this correction needs to be an educated choice that eliminates difficulties in embouchure form (or breathing, tonguing, whatever is influencing the student’s embouchure in a negative way) first.
I am an experienced teacher and never have to consider a brass embouchure type. It’s unnecessary and even makes things worse!
It does take some effort to learn how to type a brass student’s embouchure and use it to make embouchure corrections and design a course of study and practice that will work best for the individual student, but it’s not rocket science. If you found studying music history and music theory to inform your brass playing in a positive way then you already understand how taking the time to learn about different related topics is useful. If embouchure analysis is making things worse it’s because the analysis is faulty in the first place. Learn how brass embouchures actually function and apply what you learn, adjusting as you need to. And if the student is analyzing their embouchure technique at the wrong time, help your student learn to focus on one thing at a time while practicing for a bit each day and focus on the musical expression the rest of the time.
So for some time now my I have had decreased range and endurance. I think it is due to a weak upper lip. When I get about a G above the staff my emborchure changes and goes from a 1 third top, 2 thirds bottom to a 1 fourth top, 3 fourths bottom. Is there a way to just strength my upper lip?
Here, then, is my slightly edited response in that topic.
My short advice is to place the mouthpiece where you put it for the high range and learn to play your entire range there. It may take some weeks of practice before you start becoming comfortable enough to play that way always, but you’ll probably be better off in the long term. If you want to understand why I feel this way, read on.
When I get about a G above the staff my emborchure changes and goes from a 1 third top, 2 thirds bottom to a 1 fourth top, 3 fourths bottom.
Since I have not watched you play in person, you should take my advice with a grain of salt. That said, based on your description you have a “low placement” upstream embouchure type. It’s neither good nor bad, it’s sort of like being left handed. It’s less common than the downstream embouchure types, so you’ll see fewer players around using it. It also is different from the other embouchure types and certain instructions you might get that work great for downstream players actually work against low placement players. I’ve taught many upstream players and happen to be one myself.
Your switch in mouthpiece placement at a certain point in your range is actually a pretty common upstream problem. Again, without watching you play I can’t be certain if this applies to you or not, but almost every time I’ve seen this (and experienced it in my own playing at one time) the solution is not to try to keep your low register placement for the high register, it’s to learn to play your entire range with the high register placement. And this placement has been without exception, for these players, a placement with more lower lip inside the mouthpiece (placement closer to the chin).
Something that helped me and many of my students with similar issues is to place the mouthpiece on your lips where it works best for the high range, play an open note in your high range, and slowly and softly slur down a partial and back up, then back down two partials and up, down three and up, etc. Accept a thinner sound for the moment, just learn what your chops need to do in order to descend with the high register setting. Avoid dropping your jaw as much as possible for this and don’t worry if you can’t get much lower than where you want to reset.
If you watch yourself in a mirror while doing this you might be able to notice that you’re pushing your lips and mouthpiece together upward towards the nose as you descend. This is natural and proper for upstream players (the downstream embouchures can either do the same or reverse, depending on type). The track of this “embouchure motion” of up to descend and down to ascend can be close to straight up and down, or it can be angled, but it should probably be a straight line and consistently work in the same direction (i.e., up and slightly to the right to descend, down and slightly to the left to ascend). If you find yourself needing to reverse the direction of this you might be going too far with it.
Along with good breathing and proper tongue arch to change registers, finding the exact spot for your embouchure motion for each pitch is going to help you open up your sound and keep your mouthpiece placement consistent for your entire register. A good analogy is that your chops are, for now, like a muscle car. The engine sounds pretty rough when you’re idling at the stop light, but once your up to highway speed it’s very smooth. Once you can “tune up” your playing mechanics to adjust you’re “engine” will work fine in all registers.
Again, all the above makes certain assumptions based only one what you’ve written here already, and I could be way off base. I also want to mention that much of what I wrote would be wrong for most other players, so for any folks who disagree, please put my advice in that context.