Critical reaction is that the 1995-97 acoustical revamp was largely successful, though with room for further improvement, particularly in the upper registers. Reviews at the time noted "...hall sounded altogether new, with a depth and spaciousness never before heard here. ... The low strings, especially, had a new warmth and solidity, and the whole bass and baritonal range of the orchestra provided a firmer basis and a mellower foil for the sound above it, which has always been brash and brilliant. ... Not that everything is perfect. High frequencies can still sound glassy, and the high strings have not yet benefited as much as their brethren. acoustician R. Lawrence Kirkegaard had already begun to work on the problem after a private concert on Tuesday evening and continues to do so.", "The orchestra now has a mellow bass sound that simply didn't exist before. Bass drums, previously the source of loud, dry thwacks, have a new resonance and texture. Violins have a richer color.", and "It's fair to say that Orchestra Hall is, overall, vastly improved. The reverberation time, almost nonexistent before, is much lengthened. The strings, particularly in the lower ranges, are far more audible than was once the case, and all of the instruments resound with far more bloom, warmth, and brilliance. The sound is a good deal better in the other traditional trouble spot, the main floor beneath the balcony overhang, superb in the lower balcony and altogether glorious in the gallery.".