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Hello, All! Happy New Year! I was helping my older son (the budding musician) with a school project and I tried to find a good timeline of audio recording media for CONSUMER DELIVERY and I realized that it is more difficult to create than it initially appears. What I really would like to see are date ranges for Development (which can involve limited commercialization) Major Factor Dominant Format Decline of Format Niche application of Format End of Format Not all formats would have all dates. I see this ultimately as a coloured bar chart with hotter colours as it is used more. I would like to address (at least) the following formats. I have Developed and Ended dates for all of them (any corrections would be appreciated). I use 2025 to mean "ongoing" as it makes the math easier and these will run off the right side of the chart. Here is what I'm hoping for (and these are guesstimates). Note that all dates are not required for each format. See the LP for a completely filled sequence. Should I start with sheet music? ? ? Cylinder Developed 1877 Ended 1931 Acoustical 78s Developed 1897 Ended 1931 Electrical 78s Developed 1924 Ended 1962 **Long Play 33 Developed 1948 Major 1952 Dominant 1955 Decline 1980 Niche 1990 Ended 2025 Single 45 Developed 1949 Ended 1990 2-track reel Developed 1953 Ended 1960 4-track cart Developed 1956 Ended 1965 4-track reel Developed 1958 Major 1963 Decline 1970 Ended 1980 cassette Developed 1963 Major 1970 Dominant 1978 Decline 1993 Niche 2002 Ended 2008 8-track cart Developed 1965 Major 1968 Decline 1978 Ended 1988 CD Developed 1982 Major 1986 Dominant 1990 Decline 2006 Ended 2025 DCC Developed 1992 Ended 1996 MD Developed 1992 Major 1995 Decline 2000 Ended 2009 Digital Downloads Developed 1994 Major 1999 Dominant 2006 Ended 2025 Another way of showing this (and more difficult in Excel) would be to have the width of the line indicate the relative dominance of a format on a given date. I don't think we have enough data to do that for all of these. Whatever dates any of you would like to modify or add, I would appreciate it. Thanks! Cheers, Richard Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX Detailed contact information: http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.