This data is updated every 15 minutes (at 0, 15, 30 and 45 minutes past the hour)
- A 'recording' is, usually, a complete 'work' or composition (the exceptions are where multiple, very short compositions by a composer are 'grouped' into a single recording). Thus, all four movements of Beethoven's 5th Symphony count as a single 'recording'; the entire 4+ hours of Wagner's Götterdämmerung likewise counts as another, separate and single recording ...and so on. Neither the number of CDs the music came on, nor the number of tracks it might be comprised of, are ever counted separately from the work of which they are a part, in other words.
- The average number of recordings played per day is the count of the plays to date, divided by the number of days on which at least something was played, starting from January 9th 2021. A day on which no music at all is played is not included in the divisor to obtain the average per-day play count. Thus, if I played 10 recordings each on Monday, Tuesday and Wednesday, then zero recordings on Thursday and Friday, the average plays-per-day figure calculated on Saturday would be 10 (that is, 10+10+10, divided by the three days on which any music at all was played), not 6 (which is what 10+10+10+0+0 ÷ 5 would get you).
- The 'total number of recordings' statistic is a count of unique 'extended composition names' (See Axiom 5). Thus, Beethoven's Symphony No. 5 will be counted multiple times, because Bernstein, Klemperer, Rattle, Gardiner, Markevitch and the world and his dog all made recordings of that symphony, and examples of each exist in the collection. The conductor (or other 'distinguishing performer') makes each instance of the same composition get counted as a separate 'recording'.
- Each recording has an accurate duration measured in seconds. If a particular recording is comprised of multiple tracks, the duration of each track is summed to yield a single 'per recording' duration (again, in seconds) for the whole work. All the per-recording durations are then summed together and are finally divided by 86,400 to convert the total seconds duration into a total duration expressed as a number of days.
- A physical CD can contain anywhere from barely 40 minutes of music to just about 80 minutes of music. For the purposes of calculating a 'standard CD equivalent', a play-length of 70 minutes has been assumed. By dividing the collection's total duration by that 'idealised' CD duration, you get an approximate count of how many physical CDs would be needed to store all of my music. I have no idea how many physical CDs I actually have, especially since I switched to buying FLAC downloads from the likes of Prestoclassical in around 2015: large parts of my collection have therefore never existed in physical form.
- The count of 'plays' is taken from Giocoso's plays table; the count of 'recordings' is taken from Giocoso's recordings table; the count of unplayed recordings is obtained by selecting those records from recordings that do not have a corresponding row in the plays table. Divide the unplayed count by the total number of recordings to calculate the percentage of recordings not yet played (in either Giocoso or its predecessor application, AMP). Note that this means I've actually played practically all of my music collection at some point or other over the past couple of decades -but the 'percentage unplayed' figure specifically refers to the amount of music I haven't played in those two specific pieces of music player software only, and only since January 9th 2021.