VIVALDI: CONCERTI DA CAMERA VO

Though regulated by no Grand Plan, the recording of Vivaldi's with-wind chamber works on Compact Disc progresses apace so let us take stock. Twenty-two works (RV87–108) are listed by Ryom as ''concertos for several different instruments with basso continuo'', one (RV93), with no wind instrument, is unsuited to the above ensembles. Seventeen of the remaining 21 are contained within the recordings by Petri/Holliger et al (PH) on Philips, and the London Harpsichord Ensemble (LHE) on Unicorn-Kanchana, with a few overlaps easily identified by consulting the earlier reviews. Ryom also lists five ''sonatas for two different instruments'' (RV82–86), two of which (RV84 and 86) are apt to all three groups and PH include the latter in their two-disc set. Every item in the programme of Cologne Camerata (CC) is covered by the other recordings, both of high quality, but it is not simply a matter of 'counting noses'; PH and the LHE use modern instruments but CC use period ones, sounding about one s