There arose during the middle of the 12th 
          Century a school of polyphonic composition centred on the new cathedral 
          of Notre Dame at Paris. The achievements of the Parisian school led 
          by Léonin were remarkable. He composed polyphonic settings of 
          the solo portions of Responsaries, Graduals, Alleluias etc., writing 
          melismata of great length over the sustained notes of the plainsong 
          - the vox principalis, or as it was known, the tenor, for it hung on 
          to each pitch, whilst the newly composed part was known as the vox originalis 
          or the duplum. 
        
        So, who was Léonin, or (as he should be known by his 
          official Latinised title) Magister Léoninus? Well we don’t really know. 
          It is only through a document known as ‘anonymous IV’ c.1280 written 
          by a monk at the lively and intellectual monastery, [possibly one Coussemaker] 
          in Bury St. Edmunds that we learn of his existence. "Magister Léoninus 
          was the best composer of organum who composed …. to increase the divine 
          service." We are told that he wrote a cycle of "two-part settings 
          of the most important chants in the liturgical year – Christmas, Easter, 
          Assumption and others; this cycle was called the Magnus liber organi, 
          - The great book of organum" (booklet notes by Mark Everist). His 
          work was built upon by the better-known Perotinus (c.1160-1220) whose 
          music has been recorded more often including a superb disc by the Hilliard 
          ensemble (ECM 1385). In the past Léonin had to share a record with Perotin, 
          or with anon., but in recent years he has been allowed to speak for 
          himself. I am thinking of the ground-breaking first Léonin disc by Red 
          Byrd (CDA 66944) recorded in December 1996, and of a disc by Ensemble 
          Organum recorded in 1984 (HMCD 1148), which to my mind is much less 
          successful. David Munrow also tackled a handful of pieces in his ‘Music 
          of the Gothic Era’ recorded in 1975.
        
        At that time Munrow could confidently write "Léonin’s 
          Magnus Liber consisted of thirty-four polyphonic pieces for the canonical 
          hours and fifty nine for the Mass itself". Present scholarship 
          is not so certain, and it may be best to think instead of a ‘school 
          of Léonin’ rather as art scholars refer to the ‘school of Giotto’ or 
          of ‘Simone Martini’.
        
        What you hear in this music is an aural manifestation 
          of the solid and ritually ornamented rhythms of the pillars and arcades 
          of a 12th Century church be it in England or France. You should try 
          to bear in mind not the St. Denis you now know in Paris but the earlier 
          Romanesque building rebuilt at the end of Léonin’s life by Bishop Suger. 
          We can only guess at its details but enter a Cathedral, say at Elne 
          in Catalonia or Waltham Abbey in Essex then you have some idea of where 
          this music was first heard.
        
        If you want to hear some of the earliest attempts at 
          two-part writing you should try ‘Anglo-Saxon Christmas’ with 10th 
          Century mass music from the Winchester Troper. (On Herald HAVPCD 151 
          directed by Mary Berry).
        
        Red Byrd’s first disc concentrated almost entirely 
          on ‘Alleluya’ settings, which followed the Gradual at major feasts; 
          now they concentrate on the ‘Respond’. This term means responsory or 
          preferably the main section of a responsorial chant, as opposed to the 
          verse. Thus, a responsory or a Gradual consists of Respond and verse.
        
        What makes these performances so important is the not 
          only the virtuosity of the two soloists but also their use of rhythm. 
          The situation is set out clearly in the booklet notes, and I quote. 
          Léonin’s duplum did two things. 1. "He laid out the lowest part 
          in long notes and wrote highly elaborate, rhapsodic lines above it." 
          And 2. " he took the long melismas of the chant and organized them 
          into repeating rhythmic cells and wrote a correspondingly tight rhythmic 
          duplum above it." This has until recently manifested itself in 
          dancing compound time rhythms constantly being employed. This is the 
          case with David Munrow’s performances (which are notated in 6/8 time) 
          where the long notes in the tenor are also played by a set of hand bells. 
          This rhythmic procedure is known as discantus. Mark Everist however 
          adds, "Both types exist within the same composition". Thus 
          is set out for us in the booklet how this works. Some sections are performed 
          freely; there is no sense of regular pulse or of modern-day bar-lines. 
          Others, often shorter, are given the regular compound time rhythms mentioned 
          above. These are then balanced against chunks of plainchant, sung here 
          by the excellent sextet of male voices Yorvox.
        
        Ensemble Organum in their recording, which is not at 
          present available, put Léonin’s organum in the context of a Mass for 
          Christmas morning, meaning that there is yards of plainsong to negotiate. 
          Also with Ensemble Organum the discantus sections do not grow so naturally 
          out of the melismatic sections by comparison with Red Byrd. 
        
        These recordings by Red Byrd are the first to use all 
          of these techniques within a piece and not to set them in a liturgical 
          context. Not only do we have satisfactory contrasts but also the music 
          moves in an architectural space, aided here by the wonderful acoustic. 
          Volume 1 does not state its recording venue, it may well have not been 
          at St. Andrew's Holborn as the Cappella Amsterdam, who sang the plainsong, 
          appear to be microphoned rather too closely and have less air around 
          them. Yorvox are miked more evocatively seemingly in the chancel whereas 
          the soloists are in front of the nave screen. The text is always beautifully 
          enunciated.
        
        For me then this is an outstanding release where scholarship 
          and superb vocal musicianship go hand in hand. I am left in admiration 
          of the entire project. However, like Frankie Dettori, whose admiration 
          was totally for his mount after winning the Derby, one should point 
          the finger of praise at the score.
        
        
        Gary Higginson