Un problème médical (sans entrer dans les détails, je parle d'une acromégalie) a agit négativement sur le positionnement de ma langue et l'ouverture des cordes vocales m'empéchant de produire les sons dans les registres graves du saxophone (nécessitant que les cordes vocales soient bien ouvertes et la langue dans a position la plus basse possible). J'ai failli abandonner la pratique du saxophone. Dans une dernière tentative j'ai décidé de tenter l'utilisation de becs Syos pour l'alto et le soprano. Et dans les 2 cas, par un miracle inexpliquable, j'ai retrouvé la faculté de jouer des sons graves mais dans le cas du Dayna Sephens avec une brillance et puissance jamais obtenue sur mon saxophone soprano. Magnifique. Syos devrait être remboursé par la mutuelle santé :) !

Good performance over the entire range. I tried several mouthpieces that promised a good dark tone. Thin was the best overall.

After a really long break from playing clarinet - which I never fully enjoyed - I picked up the soprano. To find out if this would actually work out at all for me, I got myself a really cheap instrument on ebay (Thomann TSS 350 for those who are interested). I got along pretty well but when I tried to play with others I quickly realized the massive intonation issue and I always was too flat. I was not even using the stock mouthpiece but a mouthpiece made by a well known manufacturer of reeds.
I was close to scrap my horn and get a better one, but as I planned to buy a better mouthpiece anyways I luckily tried it the other way around. And surprise - with the Syos mouthpiece my issues are solved. One can even notice it's the same mouthpiece Dayna Stephens is playing. And to be clear on that: If Dayna says it takes a lot of air, he really means it. This allows to play very smoothly and softly without sounding muffled with the same intensity through all registers. I will definitely get either a Spark or a Morning Lockett mpc at some point to get more variety and flexibility.
Lesson learned: Never ever underestimate the mouthpiece.

As expected from description an previous reviews: a full and warm sound across the entire range. Works well with my Yamaha Z82 soprano

So often in soprano mouthpieces one is forced to choose between ease of intonation and range, depth and control of timbre. How can you sing if there is just a fixed shape to your sound? My Dayna Stephens mouthpiece has allowed me to whisper or scream without losing control of a focused dark sound that can become challenging in the smaller instrument. Working inside a shorter standing wave also typically becomes challenging for intonation when you feature a "phat" sound for your aesthetic preference. This mouthpiece responds effortlessly with my voicing and I can achieve good intonation even with wide intervals and with my early apprenticeship on a new member of the saxophone family. Thanks so much for letting me get drawn into the sound, and learn to sing on the soprano. Bravo!!