Łukasz Martynowicz

Besides everything what was explained above, there is one other, very important thing to consider: while Hayden layout is both intuitive and very capable, Elise has one annoying limitation - it is not fully chromatic, you don’t get two notes on it. So while 30 button Anglo, any English and bigger Duets are all chromatic in at least part of their ranges, Elise has scope more similar to 20 button anglo. Moreover, the price jump to upgrade from entry level Hayden to „proper” instrument is biggest of all - there is no intermediary level instrument, only Elise and then Peacock (which is still sub-standard), Beaumont and Wakkers. With both Anglo and English systems you have a lot more steps to gradually jump between. So if the price is your main concern I would suggest Anglo as a starting point, as it is the most common system and it is easiest to both buy and sell an instrument.

IMHO thumbs are too cruicial for fine outwards bellows controll and articulation to be „wasted” on just one or two easier to play notes. Besides, thumb joints axis orientation makes thumb movements a lot slower than other fingers’, especially when trying to reach further lower buttons. And frankly speaking even six notes at a time sounds rich enough on a concertina, with eight fingers being enough for smooth chord transitions in nearly all cases. I can imagine two or three thumb operated drone base buttons on the left side outside of Hayden layout being musically usefull, but otherwise it is wasted bellows controll for me.

I do use my pinkies quite often - for low bass in four finger chord accompaniments on the left side and for sharps in chromatic melodies and as an intermediary finger in some downward chord progressions. This is why I use thumbstraps, my handstraps are so loose, that I don’t have any point of contact with hand rail - if I have to make a silent squeeze I rest one of my fingers on the board. Switching hand position in handstrap is IMHO key ability on Hayden.

I have something similar to ideas mentioned above in mind for my yet-to-be-finished 66 button Hayden. My idea is to have a thumb strap (I already use one on my Elise), a wide pinky „saddle” instead of handrail and I also wanted to experiment with a different approach to handstraps - make it a set of rigid but deflectable slides that do not restrain hand movement about thumb pivot point while giving the same controll as a tight strap. This way changing the hand orientation to flat or sharp keys should not affect bellows control or stability while playing.

When I wrote about neck strap earlier it was a bit of simplification - mine was asymmetric, going over one shoulder and under another, then splitting in two on each side. It provided a very good stabilization and held concertina in very precise position and did not strain my neck. But it required a slightly twisted back to have totally immobilized left end and when one of my spinal discs punctured I could not play this way anymore. Now I have switched to additional thumbstraps and a raised knee standing position and I have discovered that I have a lot more feel for volume controll this way, so I don’t experiment with straps anymore.

At least one player tried not only resting, but also straping via velcro patches. On similar note, I have observed differences in my performance depending on the kind of trousers I rest my concertina on, with the best results with my bare skin - not only giving me additional traction, but also better tactile feedback. I can play softer and with less overall volume that way.

The reason I play with unsupported melody side is that for me personally, playing left hand side requires a lot more concentration (I'm very dominantly right handed). So I can both play melody and controll bellows with my right hand, but I can't play even the basic um-pah rhytm with free floating bass side. In the beginning I used neck strap and my hip in sitting position to stabilize the concertina and make the "loose end" move in a steady, predictable manner, but it created different problems and due to back injury I cannot play that way anymore. Nowadays I use thumb straps in addition to hand straps and play standing with knee support. With my previous setup, neck strap provided a constant pivot point of the free end, the attachment point of neck strap, and it was of little difference if concertina was moving inwards or outwards. But with my new setup, harder squeze of the bellows make an air "cushion" that provide an unstable pivot point for the melody side located at the bass side making the melody end to want to "slide" a bit on this cushion. This does not occur with chord heavy arangements, but with lighter and faster styles and single note accompaniments, this effect is significant enough to have to counter it by thumb tension, which makes my entire hand to be a bit stiffer and fast passages harder to play on the push. Just for the sake of completeness, bellows resistance on the pull has a stable, "self centering" vector, so it does not require any compensation. Combined with more ergonomic muscle work it makes it far easier for me to play some passages on the pull.

To add on that: for me, as a duet player, pull is much more natural from ergonomic point of view to a point, where I can play some phrases only on a pull or heavily struggle to play them on push, so if I could I would only play on pull . This is because I play fast phrases/short notes using retracting finger muscles which are naturally weaker and are further inhibited with push bellows direction. Another reason is because I operate bellows with my melody hand and pull direction is stable ballance wise (you go away from pivot point) and push can become unstable with higher volume and requires more controll.

Adding my two cents to slant vs no slant question. I play on Elise (slanted) but when deciding on orientation for the instrument I'm building, I decided to go with no slant, and the reason are multiple. The origin of Hayden slant is not because of ergonomics, but because slant make keys "sorted" by pitch in relation to handrest and make it possible to overlay buttons on the stave in order. But on Elise this is true only for the right hand keyboard, because slant is mirrored while note layout is not - as far as I know this is also true for H-1 and H-2. This makes it a bit awkward to play rich harmony progressions, because left hand has to be positioned slightly differently than right hand on the same chords (for example, it is far easier for me to play minor chords on the right side than on the left) and it is my common mistake to misplace my ring finger on the left side to 4th lower than intended, because my intuition seeks the button where there is none. Due to this I found that I unconsiously straighten the orientation by leaning concertina a bit forward (I use thumb straps). I have experimented with proper slant on both sides and it makes playing chords easier and more natural, but it results with instrument differing too much from both common slant implementation and no-slant Wikki orientation to retain easy instrument switching ability.

Thank you for this link, I saw this discussion a while earlier than this current thread, before I got steadily back on track of who posts what here nowadays, so I missed that it was your post. It is indeed exactly about what I was asking about and is perfectly in line with my position on the topic from years back. Glad to see that someone worked on theory behind it. The reason why I asked about this is simple - this transient period is far more important part of "why and how free reeds generate sound" question than the focus of this thread and there was a long history of discussions about how free reeds work here on this forum completely ignorant about this transient, usually leading to completely false conclusions. Now I'm perfectly satisfied with the scope of your answers and understand, that you have divided your works into separate chunks and hopefully at the end of your journey you will indeed come up with what I would call a complete free reed theory. As to DIX reeds, I must apoogize, after 5 years I misremembered my experiments from back then - I have mixed up effects of various shoe materials vs geometry and scaling. I dug up those a moment ago and Johann is right - they have overall different geometry and scaling than their typical accordion counterparts. If you still want to know more about them here's a link to harmonikas.cz with description and schematics https://www.harmonikas.cz/en/dix-1#obsah

I know that resonance and coupling matter in case of chamber layout - I was merely stating the fact, that Tom's work does not include (or it hasn't been clearly stated, that it does) chamber geometry and tongue geometry (as you more broadly point out). And with DIX reeds I don't think it's related to resonance, but to minutia of airflow around the tongue in the initial stage of agitation, restricting development of higher modes of vibration, and I brought this up as an extreme case of reed/shoe geometry influence on the tone - DIX reeds are just a tiny variation on otherwise classic accordion reed design - trapezoid tongue in non-tapered opening.

Tom, your initial post adresses differences in timbre between materials and your answer to David describes how reed shoe amplifies tongue vibration, but nowhere you adress how the vibration itself starts, which is what David asks for and what is the crux of the the question "how free reed works" and a subject of endless debates on this forume since forever. I don't know if you are aware, but couple of first oscilations of the tongue happen above the upper plane of the frame, with movements yet too small to close the gap entirely (I've been away from this forum for nearly 5 years and may have missed some important arguments; I saw there was at least one topic about turbulent flow being the source of initial vibration while I was absent). The tongue is already oscilating when it enters the frame, at which point "exactly like child on a swing" and "water hammer" analogies are adequate illustrations of how already existing oscilation is fed energy and reaches peak volume, but all those descriptions concern free reed at fully developed swing. If the initial pressure rise is too steep the reed chokes, because if you apply "fully developed swing" physics to a stationary tongue (not already oscilating slightly above the shoe) what you get is a simple one way pressure valve, with equilibrium position where the spring force of the tongue equalizes the pressure force applied to it. It is the same if the reed is set without the initial gap at all and from what you have presented here to this point I don't know if your model discerns between the initial setup with and without a gap as it should to be true. No model of the free reed will be complete without explaining first weak cycles before the tongue enters the frame. Your model should also be able to explain why "tongue tip over hole end of the chamber" produces significantly weaker speaking reed than "rivet over hole end of the chamber" configuration with every other parameter remaining the same. You might also want to test your model trying to explain why DIX reeds, regardless of materials used, produce less higher harmonics than non-DIX equivalents by the means of only two tiny holes at the tip corners of the shoe.

Thank you Don for providing at least button counts of those boxes. Sadly those do not look promising.

I know this is thread necromancy, but it seems rather appropriate place to ask this - it is now mid 2019, is Troubadour still planned or has the idea of mid range Hayden been finally abandoned?

66 or 64 if links will work as indended, 62 otherwise, in Wicki parallel layout, although the initial design includes an experimental handrest/thumbstrap that enable a switch between slant/no slant as I learned to play Hayden layout on Elise, which has a slant. But as this is my first build and goals and methods shifted around few times already, I don't really know where I'll arive at the end. At the moment I'll simply focus getting to playable state and modify it further if necessary. By the way, I stumbled upon your YT channel a month back or so - a great showcase of what duetts are capable of. Something I dearly missed all those years back, when non-folk arrangements were rare to find and there were only a handfull of recordings on Haydens.