It’s somewhat rough, but I think this’ll give you an idea…
Point 2 Things We’ve Done So You Can Use Your Melodion Forever
Mouthpiece Secret Number 1
It’s straight making it ideal for breath to flow to the instrument. The mouthpiece is rounded making tonguing and tremolo easy. The ring/stopper around the mouthpiece reduces fatigue. It’s a smooth fit with the Melodion.
Mouthpiece Secret Number 2
The pipe mouthpiece is designed so that it catches moisture preventing build up inside the instrument. Since the same sized mouthpiece connectors have been used since about 20 years ago, you can use the newer mouthpieces on our older instruments as well.
Reeds are the Life of the Melodion
The reeds should be known as the life of the instrument. They are unlikely to break or rust. They are made using a special kind of bronze. They are tuned using computers allowing them to hold their pitch forever.
Inside of the Melodion
The breath that enters the instrument goes through our original air chambers allowing for the ideal flow. This is the secret of the soft and beautiful tone. Also, the key angle / key mold makes it very durable.
I’m a big fan of Suzuki Melodions– they’re my favorite so far. However, I think this is just a lot of marketing talk! I think those are some dubious claims regarding pitch. With that said, I’d love to hear the new electric soprano :).
BTW, Here is a video of the group called P-ブロッ (Apparently P-Blot in English):
The PDF you linked, Bruno, refers to them. I didn’t even know they existed- so this is exciting. I hope to find more of them. I sometimes wish I lived in Tokyo when I was in Japan so I could go to that venue (Super Deluxe) all the time!
Anyways, I hope this helps 😀
A little OT, but I thought this looked like a good read– http://www.makotonomura.net/blog/texts/melodica/
It came up in my P-Blot search.