Nobody really knows what CMJ stands for, but then few of New York’s residents know of the five-day music festival’s existence either. Involving more than 1200 bands and 75 cross-borough venues, CMJ is for the real music fans - dare I say, geeks even - as the smallest, newest and most unlikely of musical acts enjoy the opportunity of a truly open platform for industry professionals, bloggers and downtown hipsters’ appreciation alike. Closest comparisons include the Edinburgh Fringe and Austin’s South By South West which happens in Texas every spring. But this is, after all, unique New York and CMJ is a truly NY event: non-stop and all night, featuring yellow cabs and mean door staff.

As the London Jazz Festival approaches, it's an unlikely fact worth noting that some of the bestselling instrumental jazz records of the last few years have been from Ethiopia. Ethiopian jazz composer Mulatu Astatke, now 66, is the best-known practitioner and enjoying an Indian summer. A key feature of the 2007 The Very Best of Éthiopiques compilation, once heard his music is not easily forgotten.

The music of Sibelius might speak of Finland, its unpopulated spaces, vast inland lakes, semi-Arctic climate and long, dark nights, but the annual Lost in Music festival brings together a bewildering array of Finnish bands and singers that range from rockabilly and ska to introspective folk and – of course, the national staple – heavy metal.

McDonald's (the hamburger people) are rarely acknowledged for their contributions to the arts, but without them we may never have witnessed the meteoric rise of composer Eric Whitacre. When he was 14, he heard a casting call on the radio for a McDonald's TV ad, persuaded his mother to drive him into Reno, Nevada to join the throng of hopeful teenagers, and ended up making a brief appearance in the "McDonald’s Great Year" commercial.

Maybe I hadn’t been paying enough attention. It was only at last year’s Children in Need concert, broadcast on prime time which featured the great and the good of British pop that it finally sunk in just how huge Muse have become – they were there appearing with Sir Paul McCartney, Take That, Leona Lewis and Paolo Nutini. Weren’t Muse the alternative Radiohead-lite band from Devon who sing politically loaded and enjoyably paranoid lyrics against the system and all it stands for?

With his sublime renditions of Azerbaijan's classical music, Alim Qasimov is one of the world's great performers. On the eve of the singer's appearance at the Barbican’s Transcender Weekend of spiritual trance music, where he is performing this Sunday, theartsdesk recalls a trip to the old Soviet state to drink vodka, play chess and find out about this extraordinary singer.

The group Pingasan’k “calls for good spirits”. The name refers to “a bucket to put rice in, tied with the bark of a tree”. Regardless of rice or spirits, this band touched my heart. The gentle, haunting sounds come from the bamboo tube zithers (pratuon’k) made from giant mountain bamboo, which is only cut down when they see the moon. “We do not want our instrument to smell sweet or our insects will bite it,” explains leader Arthur Kanying.

As there's something of a forest theme this weekend on theartsdesk, with the Royal Opera House's If-A-Tree festival curated by Joanna McGregor with Scanner, and a report from this year's Borneo Rainforest World Music Festival, and here, a diary of an extraordinary trip I took in 2003 to sample the culture and music of the Pygmies deep in the heart of the Central African Republic.