Any DG analog recording converted to digital and output onto CD sounds mediocre. Abbado's recording of Simon Boccanegra comes to mind - the vinyl version is marvellous. Some of the DDD CDs are also poor - I found the highly-regarded Brahms 4 by Carlos Kleiber to be unlistenable on CD, but the LP version is superb.
As to Karajan's recordings, those done in the Berlin Philharmonie from around 1978 onwards are compromised. Earlier ones are much better, on both DG and EMI. Simon Rattle's output with the Berlin Philharmonic suffers likewise and I refuse to buy any of it. Having recently heard them live I believe that the BPO are still playing as if Karajan were on the rostrum anyway.
On the other hand there are some stunning DG LPs from Barenboim when he was in charge in Paris. Abbado and Giulini in Chicago, and just about anyone in Vienna.
As to Karajan's recordings, those done in the Berlin Philharmonie from around 1978 onwards are compromised. Earlier ones are much better, on both DG and EMI. Simon Rattle's output with the Berlin Philharmonic suffers likewise and I refuse to buy any of it. Having recently heard them live I believe that the BPO are still playing as if Karajan were on the rostrum anyway.
On the other hand there are some stunning DG LPs from Barenboim when he was in charge in Paris. Abbado and Giulini in Chicago, and just about anyone in Vienna.