This three-disc set is designed certainly for those wishing to explore and understand Deryck Cooke's realisation of Mahler's tenth Symphony. It is not designed for those who are new to the work. For those simply wanting a credible recording of it, they should look elsewhere, for example to that by Simon Rattle and the Berlin Philharmonic.
Part of the reason I say this is that, although the third of the three discs contains a full Proms performance of the symphony, this is in mono and has the usual drawbacks of a live radio performance, namely coughing and spluttering and the shifting of feet from people who have stood for considerable time. Indeed, the whole three CDs are disappointingly in mono, and this makes the set really for the committed Mahlerian rather than for the debutant. The poor sound quality arises due to these being for radio transmission rather then a performance to be made for sale. It is not that there is excessive hiss and crackle, but instead to the rough edge of the orchestra's sound.
In the first CD, Cooke stresses that his is a realisation rather than a completion. Mahler's score was complete more or less, certainly in terms of thematic lines, although even here there were a few gaps that Cooke had to conjecturally fill. There were more gaps where the full orchestration was concerned, but Cooke has nevertheless skilfully made real, I believe, a version of the tenth with which we can all be at least content, if not 100% happy. On the first CD he goes through the five movements over thirty-five minutes, stage-by-stage prior to its performance on the second CD. Cooke makes plain he did not subscribe to the view that Mahler saw his tenth as a valediction; rather it is a benediction, moving in stages from `inferno' to `paradiso'.
So CD2 is the resulting realisation of Mahler's non-orchestrated sketches, as well as those parts that he did manage to orchestrate. The gaps, then, are essentially in the two scherzos. As Colin Matthews makes plain in his excellent sleevenotes, it was here, "where it seemed that the texture was deficient, amounting to not much more than five minutes of missing music", that Cooke had to draw deep inspiration. Cooke never claimed that he had completed Mahler's work. As Colin Matthews goes on to say, "Cooke was more aware than anyone of the imperfections of the [realised] work as it stands, and that Mahler was the only person who could have improved it."
There is very little in this set about Mahler the man. The focus is on his tenth and Cooke's realisation. For those wanting to explore this aspect, this is a marvellous, nay indispensable collection. For those wanting to know more about Mahler as a composer in his last years or about how Mahler himself composed what he could of the tenth symphony, they are likely to be disappointed.