On Easter Sunday this year, Italian tenor Andrea Bocelli performed Amazing Grace to an uncharacteristically empty square in front of the Duomo cathedral in Milan, Italy, as part of Music For Hope - a free 30-minute concert for a world under lockdown.

While there was no one there physically, millions from around the globe tuned in to watch the concert's livestream on YouTube. At its peak, there were 2.8 million concurrent viewers, making it one of the biggest musical livestream performances of all time and the largest simultaneous audience for a classical livestream in YouTube history.

Whether it is a global event like Bocelli's Music For Hope and the recent star-studded One World: Together At Home, or an intimate weekly livestream session from American band Death Cab For Cutie frontman Ben Gibbard's home studio, the face of concerts, tours and festivals has changed in the wake of the coronavirus pandemic.

Neither major, international music highlights like Coachella and Tomorrowland nor concerts on the local front, including those by Green Day, A-Ha and Stormzy, have been spared, with cancellations and postponements announced.

But all is not lost. As the pandemic continues to keep much of the world indoors, there are now free music shows one can view from the comfort of home as artists, also homebound, use platforms like Instagram Live, Facebook, YouTube and Zoom to stay connected to fans.

Some, like rock bands Metallica and Radiohead, are digging into their archives and sharing never-before-screened full-length concerts in their entirety.

It seems going online has galvanised the artists as well.

In a pre-recorded message before one of the streams, Metallica drummer Lars Ulrich said: "I hope that everybody out there is doing as well as can be expected under the circumstances... I hope that Metallica is helping at some level with all the craziness that you guys are going through - it's certainly helping at this end."

And Death Cab For Cutie's Gibbard told Rolling Stone magazine the weekly broadcasts have "given (him) purpose".

He said: "In these uncertain times, it's been really helpful to me and my mental health to know, 'Okay, it's 4pm, I got to have a job. I can't disappoint these people. I have to get on the computer and play music.'"

Several public health experts in the United States have said that concerts will not be safe to attend "until fall 2021 at the earliest", so watching gigs online might be something music fans have to embrace.

Avid concertgoer Arisya Sulaiman, 32, likens these unfiltered livestreams, which are generally stripped of fancy production, to "intimate bedroom sessions". So far, she has caught streams by the likes of American pop stars JoJo and John Legend, and Malaysian singers Yuna and Sheila Majid, mostly via Instagram Live.

"The sessions are so candid, down-to-earth and relatable. They may not be (full) concerts, but they are a new level of fan service," says the post producer. The last gig she attended was by London jazz group Ezra Collective on March 3 at 222 Arts Club.

"It's still a world away from the experience of watching the artist in concert because you don't have the professionals to balance the audio, but the dialling in by other artists to collaborate live is cute," she says.

Some fans go the extra mile to turn watching from home into an event. Marketing manager Lily Kim, 29, sets calendar reminders and has "strobe lights and drinks on standby" as she tunes in to the weekly livestreams of Belgian dance music festival Tomorrowland.

Meanwhile, tech editor Chesca Tan, 29, has been looking forward to watching Japanese rock band One OK Rock, who are streaming six past concerts via YouTube Premieres until the end of May. The band's gig at the Singapore Indoor Stadium on May 9 has been postponed.

"To get in the mood, I definitely need to watch it on my TV in high definition and have the speakers up to get the full experience, as much as a living room can provide," says Ms Tan. "I also have my friends on FaceTime so we can try to cheer together."

Concerts you can watch while in isolation

#METALLICAMONDAYS

Legendary American heavy metal band Metallica are showcasing some of the best performances in their catalogue via full-length concerts streamed every Monday (8pm, United States time, or 8am, Singapore time, on Tuesday).

A pre-recorded message by one of the band members kicks things off, in which they share an anecdote about why the show or setlist was special.

So far, shows ranging from Copenhagen in 2009 to Paris in 2017 have been streamed.

Watch it on: facebook.com/Metallica or bit.ly/3bwiylc