{"id":9269,"slug":"shazam-apple-gap-depth-sensitivity-2026","title":"The same Shazam-to-Apple overlap measured at four Shazam chart depths, 15 African markets, 16 August to 6 November 2026","source":"This desk's own Shazam and Apple Music daily chart collection (afw_chart_snapshot \/ afw_chart_entry)","source_url":"","source_type":"computed","method":"Population: every date on which this desk's chart store holds both a Shazam song chart and an Apple Music songs chart for the same African market, 16 August to 6 November 2026, giving 1044 paired market-days across 15 markets. Apple's songs chart is exactly 100 positions in every one of these markets and Shazam's is 200, so Shazam is truncated to its top 100 before any comparison, making both windows 100 slots wide. Titles are matched on a normalised string: Unicode decomposed and accent-stripped, lowercased, parenthesised or trailing featured-artist credits removed, all remaining punctuation reduced to single spaces. A Shazam slot counts as same-day overlap if its normalised title is anywhere in that market's Apple songs top 100 on that same date, and as never-charting if it is absent from that market's Apple songs top 100 on every date the store holds, including dates with no Shazam chart, which makes the never-charting count conservative. Percentages are computed in this dataset, not in prose. The overlap is then recomputed four times on the identical 1044 paired market-days, truncating Shazam to its top 10, top 25, top 50 and top 100 while holding Apple's window at its full 100 positions. If the gap were an artefact of comparing a deep chart against a shallow one, it would shrink toward zero as the Shazam cut-off tightens.","unit":"count","license":"Afrobeats Wire's compilation and analysis are licensed CC BY 4.0. Rights in the underlying source data remain with the source named above.","confidence":"high","retrieved":"2026-11-06 07:49:23","n":4,"first_party":0,"columns":[{"key":"scenario","label":"Scenario","type":"text"},{"key":"shazam_depth","label":"Shazam depth","type":"number"},{"key":"shazam_slots","label":"Slots measured","type":"number"},{"key":"same_day_slots","label":"On Apple same day","type":"number"},{"key":"same_day_pct","label":"Same-day overlap, %","type":"number"},{"key":"never_slots","label":"Never on Apple top 100","type":"number"},{"key":"never_pct","label":"Never-charting, %","type":"number"}],"rows":[{"scenario":"Shazam top 10 vs Apple songs top 100","shazam_depth":10,"shazam_slots":10369,"same_day_slots":5088,"same_day_pct":49.07,"never_slots":3917,"never_pct":37.78},{"scenario":"Shazam top 25 vs Apple songs top 100","shazam_depth":25,"shazam_slots":25956,"same_day_slots":9730,"same_day_pct":37.49,"never_slots":13101,"never_pct":50.47},{"scenario":"Shazam top 50 vs Apple songs top 100","shazam_depth":50,"shazam_slots":51927,"same_day_slots":15700,"same_day_pct":30.23,"never_slots":30310,"never_pct":58.37},{"scenario":"Shazam top 100 vs Apple songs top 100","shazam_depth":100,"shazam_slots":103990,"same_day_slots":24710,"same_day_pct":23.76,"never_slots":67852,"never_pct":65.25}]}