Quad90 might sound like some long-lost early 90s rave outfit (white jumpsuits and medical masks de rigueur) but is actually the name (meaningless but cool they say) chosen by singers Amelia Lironi and Naomi Mackay for a band which moves to more of a disco beat. ‘Chic are a really big influence for us,’ says Lironi. ‘But it’s not all happy disco songs. Our music also has a darker undertone.’

That hint of post-punk flintiness can be heard all the way through their catalogue to date, from serene shoulder shimmy debut single ‘Le Blank’ right through to the blithe ‘Sentimental Sunday’, infused with the soulful breeziness of early 80s Glasgow outfits such as Sunset Gun and The French Impressionists.

With their unison vocals in that Chic style, Lironi and Mackay blend beautifully. Both have been singing since childhood, Mackay in choirs and Lironi performing backing vocals over the years for her parents’ various musical exploits. Mum is Katy Lironi of The Secret Goldfish and dad is Douglas MacIntyre, who currently records as Port Sulphur but has played with the likes of Love And Money and Jazzateers, runs the much-loved Frets concert series in Lironi’s native Strathaven, and helms the coolly curated Creeping Bent records.

Much as Lironi appreciates her musical background (Clare Grogan is her aunt, and dad even plays in her band), she found her own path while studying music performance at Busby’s Riverside Music College, where she first met Mackay. The pair discovered their simpatico vocal blend when they were put into a college band together. ‘One day you would be working with someone on jazz, the next you were with someone who wanted to do heavy rock, so you had to be quite versatile,’ recalls Lironi. ‘It pushed you out of your comfort zone but you could make it your own. Because we were around so many different styles of music, it’s hard to stick to one thing. Quad90 is quite different again. Because we were friends before, it’s a good foundation. When we sing together our voices sync into one and we do that on purpose so it sounds really smooth and whole, and then we can play about with different harmonies.’

In the past couple of years, the duo have released a steady stream of singles on the ever industrious Last Night From Glasgow label; calling-card ‘Le Blank’ was chosen by 6Music presenters Deb Grant and Tom Ravenscroft as one of their singles of the year. Quad90 have also just played their most high-profile gig to date, supporting BMX Bandits at Celtic Connections, and in September will release their eponymous debut album which they’ve worked on with honorary band member Samuel Joseph Smith at the analogue wonderland that is Green Door Studio in Glasgow’s West End. ‘The songs have their cool wee individual twists,’ says Lironi, but she does promise that, true to their roots, at least one track is ‘very disco.’

Quad90’s new single ‘Sentimental Sunday’ is released by Last Night From Glasgow on Friday 21 February.