Answer by taking a quote from the following article:

The Twilight Sad are a Scottish post-punk/indie rock band, comprising James Graham (vocals) and Andy MacFarlane (guitar). The band are currently signed to Fat Cat Records and have released four full-length albums, as well as several EPs and singles. Their 2007 debut album, Fourteen Autumns & Fifteen Winters, drew widespread acclaim from critics, who noted Graham's thick Scottish accent and MacFarlane's dense sonic walls of shoegazing guitar and wheezing accordion. The Twilight Sad's notoriously loud live performances have been described as "completely ear-splitting," and the band toured for the album across Europe and the United States throughout 2007 and 2008.

Guitarist Andy MacFarlane composed the song "The Weath-er Is Bad" for Semiconductor Films' short film Brilliant Noise, a film pieced together from archive NASA footage of the sun's surface. The song was later included on the Killed My Parents and Hit the Road compilation. MacFarlane also provided a remix of Errors' song "Bridge or Cloud?" in January 2010, which was posted as a free download on NME's website. In February 2011, MacFarlane provided a remix of Fat Cat labelmate Ensemble's track "Before Night", which was posted as a "song of the day" on The Line of Best Fit's website.  Singer James Graham appears on the live album Quietly Now! by fellow Scottish band Frightened Rabbit, providing additional vocals on the track "Keep Yourself Warm". In 2011, Graham appeared as a guest vocalist and songwriter on the album First Edition by The Fruit Tree Foundation, a supergroup collaboration of Scottish musicians headed by Rod Jones and Emma Pollock for the benefit of the Mental Health Foundation for Scotland. In 2015, Graham participated in Aidan Moffat's backing band during Moffat's UK tour performing Scottish folk songs. The tour was part of the documentary film Where You're Meant to Be, which was released the following year. In 2016, Graham featured as a guest vocalist with supergroup Minor Victories on their song "Scattered Ashes (Song for Richard)". The track appeared on Minor Victories' self-titled album. In 2017, Graham co-founded the band Out Lines, with fellow musicians Kathryn Joseph and Marcus Mackay. Out Lines's debut album, Conflats, was released on 27 October 2017 via Rock Action Records, Mogwai's label, where Graham also works outside his Twilight Sad duties.  Under the name Orzelda, former bassist Craig Orzel released a solo album, The Wee Shop Is Filled with Delights, in 2008, with the EPs My Dress Up and Spiders following in 2010.

what other side project did he work on?
In 2011, Graham appeared as a guest vocalist and songwriter on the album First Edition by