And great samples they are too, illustrating my own problem also.
I had been trying to tune my Phonak Nathos Autos. I asked the advice of another forum member here by private message how they eliminated their vibrato situation and using DSL v5a was apparently the answer.
I thought I had already tried all the Fitting Formulas and had decided upon Adaptive Phonak Digital Contrast being the best sounding - save for the vibrato. So I tried DSL v5a and it did indeed reduce the vibrato but not totally eliminate it. So I went through all the Fitting Formulas again and found that NAL-NL 2 Tonal was even better. I still had vibrato sometimes but less often than I had previously.
Two days ago, I tried some Oticon Dynamo SP8s and the audiologist said that he’d been advised to use the NAL-RP fitting formula (Rationale in the Genie software) to match my previous use comfort and the result was brilliant! Sadly, that formula, whatever it is, is not available in the Phonak Target software but I found it strange that it was similar (sounding at least) to what I found the best for the Phonaks.