Disney

While available on Disney Celebrating Mickey Blu-ray, you can also watch it in HD Streaming everywhere after it went in public domain

Mono track is on the included Blu-ray; 4K Blu-ray missing original mono. LaserDisc probably better

See caps of Blu-ray vs DVD

1991 CAV LaserDisc

• 1991 CAV LaserDisc includes an approximation of the original Fantasound mix in Dolby Surround using the surviving magnetic mixdown, using Stokowski's original mixing notes as a reference. Original aggressive pans and dynamic range are left in tact.

• The 2000 DVD uses this same mix in discrete 5.0, but with some unnecessary dynamic range compression + a redub of all Deems Taylor audio with Corey Burton.

• The 7.1 mix on the 2010 Blu-ray sounds poor, having been hit with excessive noise reduction, dynamic range compression, original aggressive pans no longer in tact, and the channel usage no longer resembles Stokowski's original intended sound design. 

Disney UK Blu-ray or bootleg 35mm scan having less DNR and digital repaint/recomposit

Disney Blu-ray includes a lossy mastering of the original mono mix, most likely the best sounding version since no LD or VHS included it

1995 Disney CAV LaserDisc

New restoration looks stunning: caps

1995 Disney Archive Collection LaserDisc for OG mono track

Unrestored: 35mm scans or 1990 Disney LaserDisc

Restored: 1998 Disney LaserDisc/VHS and DVD and Blu-ray versions are edited (colors altered, DNR applied, and animation errors fixed)

Unrestored: 35mm scans or 1990 Disney LaserDisc

Restored: Disney Blu-ray

35mm scans, possibly?

Unrestored: 35mm scans

Restored: Disney Blu-ray

35mm scans

1995 Disney CAV LaserDisc

Disney 4K Blu-ray, see caps https://slow.pics/c/hE3HUCdj

Disney 4K Atmos is great, a reference quality track. It's a very slight remix (music seems to be from a better source), but it's completely seamless and faithful to the original, better fidelity than anything since the 1994 30th Anniversary Edition LaserDisc.

All DVDs (and 2010 Blu-ray) sound far worse than the 4K Blu-ray/LaserDisc and have various missing sound cues.

Cropped from 1.37:1 to 1.85:1 for original theatrical distribution. Opened up back to 1.37:1 for remaster per director’s request 

Magnetic Video VHS Tape

Disney Most Wanted Edition DVD and Blu-ray releases are altered

35mm scans or Disney LaserDisc

Disney 4K Blu-ray has the original mono as the 2.0 track but only in lossy DD. Here’s a detailed analysis by a longtime fan of the film.

Disney 4K Blu-ray caps

2027 Original Trilogy restoration/50th anniversary rerelease clips leaked plus release confirmed

OG: "4K80" or "D+80" on the high seas

Special Edition: "4K97_V" or "D_97_VI" on the high seas.

If not, the 4K Blu-rays are generally considered an improvement over the 2011 Blu-rays. (although both restorations are DNR'ed and have issues).

OG: LaserDisc audio is the best option for the Dolby Stereo mixes. 70mm six-track mix is included in 4K80 (taken from an actual 70mm print). There are 16mm rips of the mono mix.

Special Edition: Cinema DTS or 1997 LaserDisc for the Special Edition.