sometimes to the point of breaking the musical line because for the next note you sing you reset your voice back to where you started. If you cresc, that's fine, but keep the volume going until the musical line suggests a change, or don't cresc so much. This may be happening because when you find a comfortable placement for your voice, you sing comfortably, which is good. The problem might be that when you change vowels or consonants you lose placement and then have to find it again? If that's the case, I would work on doing things that help you keep placement no matter what your mouth is doing.
This song seems to have more moods to it than you seem to allow it to have. I don't know the song very well, but that's my initial impression.
I must say that I was puzzled by the critiques. For one thing, there is no such thing as diaphragmatic vibrato, as it is physically impossible to directly control the diaphragm. A lot of faulty voice teaching is based on misunderstanding what we can and cannot control in the body. The closest she could come to that would be, I guess, deliberately inducing hiccups. Maybe the comment meant something more like generating vibrato from abdominal muscles, but that would produce a pretty different sound from what m1469 is making.
It is a bit more pronounced on the bigger singing, which means it (the vibrato) is fulfilling its main function: to balance and protect the vocal mechanism when more demands are put on it, such as loud singing and high sustained singing. Overall, it's pretty consistent. When you hear it go in and out a bit, the voice just needs to keep spinning forward (in terms of energy and momentum) so the phrase drives all the way to the end-- ideally feeling the high point or arrival on the last accented syllable. I think you could just experiment with basically doubling the length of the phrases in your mind, in terms of energy and crescendo, and then just notice whether you are letting the voice go "dead" on moving notes-- maybe see if you can keep it alive every single moment, if you know what I mean. But really, the voice is working beautifully.
It was suggested that the aria has many more moods, but it doesn't. The recit actually does-- it's all over the place, but that's not the part she sang here (m1469, sing the recit!). The slow half of the aria is a question (a pretty sad question) and the fast half is her wistful yearning that her own faithfulness would bring back her man. That's about it. I like the slow section quite a bit slower, and would be willing to hear several more breaths in exchange for the extra drama of a slower tempo.
I did notice that on sustained notes (which are often in the upper range) I generally do tend to let it out more than on moving notes. However, what jlh has commented on, as far as it being inconsistent and even distracting from the music at times, I am willing to consider with my teacher. I did also notice that on sustained notes in the middle of phrases, I crescendoed... a musical decision I will need to "deal with".
according to this following thread - there IS a mistaken vibrato that is controlled mostly by the diaphram (but, as pointed out, is not the 'true' vibrato) and perhapsm1469is NOT doing this. www.p277.ezboard.com/fdaringdivapre20thcenturyartsong.showMessage?topic=617topic
oh. forget the link (unless u want to google 'diphramatic vibrato' and click on the fourth or fifth link down - with ezboard in it).
So yeah, I just had to go back and find this! How's the singing coming, m1469?