“Unplugged sessions have fallen from favour since their 1990s heyday, but here Mali’s leading diva reminds us that sometimes they can eclipse plugged-in originals. The template is Oumou Sangaré’s 2017 album Mogoya, which has already reappeared as a dance-oriented remix. Acoustic is a different beast entirely. Recorded live in a French studio over two days last August, without amplifiers, overdubs o”