I look forward to the release of these and many other Karajan concerts from Continental and Japanese brodacasters.
Universal which owns DG, Decca and Philips has a problem now that Unitel has been sold off. If you read the small print on their latest UK DVD catalogue for all Unitel derived releases it says 'whilst stocks last'. This means that there are limit stocks of the Boulez Ring, the Karajan Boheme and many other items in this catalogue. My dealers advice is if you want any of them you should get them NOW (he would say that wouldn't he <G>

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I have many of the Unitel concerts you mention on Laserdisc - and they are worthy of re-release - but the sound on some of them is pretty poor, the Brahms 1 for example.
But whilst we chastise DGG one should be grateful to EMI their March batch of archive releases on DVD includes a Karajan concert (does anyone know the programme?)
But Sony should not get off so easily - we await, in UK, the Alpensinfonie. I have it from the US and its a monumnetal reading and a real live document of HvK at work complete with him wincing in pain at some parts as his body buckles in the heat of the moment. But where is the Heldenleben, Metamorphosen (another great reading - better even then the 1982(?) DG CD), T&V and Don Q. Where is the glorious ASZ coupled with a Mozart Divertimento ? Many of these are out in Japan. I suspect there's also a late Brahms cycle in the vaults somewhere - we need that because like the Beethoven it will be in better sound than the equivalent DG releases. There's also a Pictures and more Ravel, not to mention a Bruckner 8.
There may aso be from French TV a Mahler 5 - there's certainly a rehersal.
I share your pain.<G>