Thanks, skeptic. I think that's a perfectly fair point. Hopefully it was easy to see that I was attempting to 'gently goad' more experienced listeners who own the Yggdrasil to address a wider audience! The Yggdrasil is very interesting for lots of reasons: R2R DACs, implementation of a different type of filter when many R2R designers are abandoning both digital and analogue filters, and so on.
In the past, DACs offering greater resolution have seemingly done so at the expense of other musical traits. The interest here, for me at least, is whether this design manages to keep it all. Really good DACs, no matter the design, simply sound like music and the performance, the sound so well-put together that realism and verisimilitude shines through. Examples of the Yggdrasil aren't readily available here in New Zealand to hear (unless there is someone in Auckland who has one and wants to invite guests around?). Probably not anywhere but the US and EU yet.
Music lovers know who they are! They don't need me to identify them. For my part, while not attempting to start my musical career at 2, I did start violin (Emanuel Hurvitz, Adrian Levine, Diana Cummings, Derek Collier being teachers) and piano at 4, finished all my grades appropriately by 12 (violin), led every youth orchestra I played in, studied at the Royal Academy of music, was a chorister at Westminster Cathedral under Stephen Cleobury, recorded on Decca, played at all the major concert halls of London (Albert Hall, St John's Smith's Sq, all the South Bank auditoria, etc) as well as at the Proms. But none of this is terribly relevant, unless it means that - like you - I may have a well-trained ear and some ability.
For more involved listening sessions, I don't use headphones at all - so your point on our headphone rig is taken. We use our Audio Innovations L2 (CIFTE 12AU7s, Brimar EZ80), Beam Echo DL7 35 (with KT77s, NOS Mullard GZ34s, Valvo EF86s and Tesla frame-grid 12AX7s, Gresham iron) into stacked Quads (57s). I think we do just fine for resolution so we'd be eager to hear the Yggdrasil, should it prove compelling enough to try.