It is notable that Ar Log's members are drawn from across the diverse geographic and cultural regions of Wales - and from differing musical backgrounds.
Graham Pritchard was also successful in combining, throughout his career, the complex harmonies of Ar Log with the lighter fiddle style employed by Mynediad am Ddim of which he was also a member.
Burns made the transition between Ar Log and the Hennessys, a south Wales group singing in the English language.
In the absence of drums or percussion, Geraint's energetic guitar style contributed at least as much to the rhythm as to the harmony of the group.
These contrast with sea shanties of J. Glyn Davies ("Fflat Huw Puw" and "Rownd yr Horn").
In 1983, Ar Log's horizons expanded substantially with the addition of Stephen ('Steffan') Rees (accordion, fiddle and keyboards).
By this time, Ar Log had become particularly associated with Dafydd Iwan, a long-standing figure in the Welsh national movement.
In 1983, the group recorded an all-instrumental album, Meillionen (=clover leaf), aimed primarily at the Welsh folk dance community.
Ar Log's ability to convert simple tunes into sophisticated harmonies is demonstrated in tracks such as "Cerrig y Rhyd".
[2] Ar Log V probably remains the group's most prominent album in terms of blending the synthesiser into the traditional elements.
However, by now, Ar Log had essentially become a part-time operation, as the group's members had found full-time employment elsewhere.
In 2004, Dafydd Roberts became Chief Executive of the Welsh record label Sain, which had released several of Ar Log's albums.