If you are interested in DSD256 recordings from analogue 15ips 2 track tapes, Bob Witrak has been doing those for some time. His company is High Definition Tape Transfers and he gets classical and jazz (many are from Jonathan Horwich, a fine jazz producer and engineer in Chicago) and if they are good enough to not need any editing, he records them directly onto DSD256 using the Merging Technologies HAPI system. His website is
https://www.highdeftapetransfers.com.
For tapes that need a little editing, he transfers to DXD352 which I buy and will also offer them converted to DSD128 and other formats.
At last count he has well over 100 albums recorded in DSD256 (he calls it pure DSD256 if it is directly recorded to DSD256 from tape). He also has done other hirez formats, including some multichannel recordings. Many are classic recordings from the Golden Age of analogue, and many are recent releases, particularly the jazz ones. His mch recordings are, IIRC, all PCM hirez.
Bob offers the files in different formats - for example, the pure DSD256, he also offers in DSD128, and DSD64, as well as different PCM formats. I always get the format of the original file - normally DSD256 or DXD384. The lower resolution files are cheaper than the higher rez ones. The prices are competitive with other download sites, cheaper during his sales mentioned below. The engine he uses to provide the files for download seems to work very well, and I like that in your account, you have all the files you have ever ordered from him available for download, in case you accidentally mess up or erase the file.
Bob frequently has sales - 20% off plus an additional 10% for larger purchases, centered around the different holidays. Today is the last day of his President's Day sale. I have purchased a large number of his albums, almost all of the DSD256 and DXD352 classical albums. Most of the tapes he dubs from are 15ips 2 track, though a few are from 7.5ips 2 track, and 7.5ips 4 track.
Larry