SINGAPORE - There were few or no complaints about the sound at the National Stadium after concerts by Stefanie Sun and Mariah Carey earlier this year.
But Taiwanese singer Jay Chou's gig at the same venue last Saturday led unhappy fans to vent their anger on social media, lambasting the concert's "horrible sound system" and "poor quality".
Local sound engineers that Life! spoke to say that what is called a bad sound can be subjective.
There are usually various factors that lead to fans being unhappy with the quality of the audio at gigs. Among these are the size and shape of the venue, the position of the seats, the engineers twiddling the knobs and the audio equipment used.
Sound engineering veteran Shah Tahir, 56, who has worked on major events such as the National Day Parade, says that the venue and environment are usually the No. 1 cause of lousy sound at shows.
"The National Stadium has a bowl-shaped, closed environment, so there will be a lot of acoustic problems. In that situation, the type, amount and design of the speakers that you use can counter the problems.
"You can have the best system in the world but if it's in a place that is not going to work, then it won't work right."
Chou fan Anne Loh, who has been to all of his past concerts here, tells Life! that the audio on Saturday was the worst she had heard yet.
"The sound was very muffled and the bass was too overpowering," says Ms Loh, a 41-year-old magazine editor. "Jay sounded bad but his backing singers sounded even worse, sometimes you couldn't hear them at all.
"The sound at his concert at the Singapore Indoor Stadium last year was not perfect but was much better. I was expecting the National Stadium to have a better sound because it's a new building."
This problem was in addition to complaints about a leak in the retractable roof of the stadium. On Sunday, The Straits Times had reported that fans posted photos of a big area where there was no shelter inside the venue, which they said was letting rain get into the concert area.
Chou's concert organisers, Multimedia Entertainment, told Life! that they were responsible for the sound engineering at the concert and worked with an external partner for sound and equipment. They declined to reveal whom they contracted for the job.
The company's events director Adeline Low says: "We tested the sound before the concert and found it to be satisfactory."
Multimedia, which organised Chou's three sold-out concerts at the Singapore Indoor Stadium last year, is currently gathering feedback from the fans who went to the show.
Ms Low says: "There have been calls to stage Jay's next concert back at the Indoor Stadium. We will consider all factors before deciding on next venue."
Sound engineer and music producer Leonard Soosay, who has engineered live sound for artists like Mandarin singer Stefanie Sun and indie band Electrico, however, says that stadiums have the potential to provide great sound in a concert.
"Look at London's Wembley Stadium. It's not just a sports venue, and it's not designed to have the best acoustics but a lot of concerts with great sound have been held there," says the 48-year-old. "The experts who work on shows there have refined their techniques over the years to optimise the sound of gigs."
Not all fans were upset by what they heard at Chou's Saturday show, though. Travel manager Peter Koh, a fan of Chou's for 14 years, says he was happy with the sound at the gig.
The 42-year-old says: "I wouldn't say the sound was perfect, there was definitely echo in some parts but overall, I could hear everything and I did not have any problems with the sound."