Where the facts come from. Every spec, feature tick and claim comes from the maker's own page, a store listing, a manual or a retailer's spec sheet, read on 2026-10-07, and the exact words relied on are kept with each row (open "Sources" on any card). Store ratings and review counts are the stores' own on that date, pulled through Sonar, an app-store analytics service. A feature is marked yes only when one of those sources says it; when none does, it is shown as unknown rather than as no.
How it was checked. Every row was researched once and then handed to a second, independent pass whose only job was to break it: open the same pages, check every spec, every tick, every rating and every quote. Rows it could not confirm were corrected, marked unknown, or dropped before publishing.
What this page does not measure yet. We have not put a drum recording through every app at half speed and compared how the hits survive. Time-stretching smears sharp attacks, and drums are all sharp attacks, so it matters; when we test it, the method will be here.
Prices. Every price is in US dollars, read on 2026-10-07 on the store or page named next to it, with a link: Sweetwater, Musician's Friend or the maker's own store for gear and books, the US App Store's in-app purchase list or the maker's pricing page for apps. When a maker sells for less on its own website than in the app, both are shown. Prices change, so the date is part of the fact: check the store before you buy. Nothing on this page is an affiliate link.
Photos. Product photos and icons belong to their makers and publishers, taken from their own pages to show which product a card is about. Each card names its source; a maker who wants a photo removed can write to support@upbeat.studio.