Well, I have the CDs and obviously is not a first choice, but I find some
interesting points on it.
I will comment two aspects that I suppose come from Berlioz instructions. I
detected them hearing the CDs, I don’t have the score with me.
The first one is the choice of a “semi-choir” of ten tenors singing in
unison instead a soloist tenor in the Sanctus.
It is not a bad idea. Independently that normally the specifications by
Berlioz to use some 800 people to perform the Requiem are not honored, a
great amount of forces are used in a highly reverberant space (a medieval
cathedral), maybe around 150 to 200 or maybe more. And in this situation,
the tenor, specially if he has a lyric voice cannot be in an equal
situation as the rest of the forces. Of course, the recording engineers can
do miracles with the microphone positions, but such kind of solutions have
the tendency to sound artificially. In this recording, the ten tenors
singing softly in unison, and placed in the back of the choir, sounding
very naturally and pleasant.
The second aspect I like to tell you, is that contrarily to many recordings
that the choir sings loud or sings softly, here it seems that they are more
combinations, at least three; loud (whole choir), soft (whole choir), and
“reduced choir” (or semi-chorus). For example in the Sanctus, the dialog
between the ten-group-tenors and the ladies choir is sung by a reduced
number of ladies, most probably in the range of 15 to 20 persons, and it
sounds beautiful. I assume that are Berlioz suggestions, J. E. Gardiner did
it similarly in his recording of Romeo and Juliette.
The same is done in the Rex Tremendae. The fortissimo and brassy sections
(the Final Judgement) are sung by the whole choir, and the prayer sections
are sung by a reduced choir (semi-chorus). So you can hear an interesting
dialog in the music. We should not forget that this Requiem was composed
for the funeral of one person (Napoleon Bonaparte, I understand) and not
for the funeral of the whole mankind.
For the technology that it was available in 1989, the sound recording is
OK, big dynamic range with no distortion and no clipping.