The music seems to be literally bouncing off the walls. Vocals in English, Cantonese and Putonghua intertwine and travel across the small room and back again, transporting the listener.
It's a new genre called 9D music - and it's a distinctly local sound. The lyrics derive mainly from Taoism and the notes, its creators say, travel on sonic paths arranged according to the Tao of I-ching.
And it's not just for entertainment. The music is created with tranquillity in mind, providing soothing sounds to calm listeners' nerves, and improve health and fortune. It's a departure from the city's usual fare of Canto-pop and indie - and those behind it are hoping it will become China's answer to New Age music.
The man behind the sound is Junno Tang Hong-si. Formerly a triad member, Tang turned to Taoism. He came up with the idea of melding the I-ching, fung shui, Taoism and music nine years ago. He thought it might be a way to help unemployed dropouts hooked on internet cafes.
'Back then, I wondered why the kids were so addicted to the world of computer games,' said Tang, the chairman of the Institute of Confucianism, Buddhism and Taoism.
Tang, who is also a member of the Taoist Association's youth committee, learnt how to play computer games to try to reach this section of society. 'Later I realised that it wasn't just the computer games ... It was the multidimensional sound effects in this world of online games that got them hooked - like the music and sounds used in a battle game.'