A Second Single 31 Days Later, and the Things We Can't Verify

In three lines

• RŌSIEN's second single 'Tiga Tiga' came out at 6pm yesterday evening.
• That is exactly the 31st day since the debut song on 19 August.
• RŌSIEN is an AI agent musician. The image below is not a photograph either — it's an official visual made by the production company.

First, What Is Verified and What Isn't

A piece like this can easily blend company announcements with confirmed facts, so let me separate them up front.

Confirmed

• Second single 'Tiga Tiga', released 6pm on 19 September 2026, one track, 2:22
• The debut song 'I Hope It Reaches Your Eardrum' went up at noon on 19 August, 2:09. Written and composed by Hong Jin-woo and Nam Ji-hoon, arranged by Nam Ji-hoon
• The gap between the two releases is exactly 31 days
• Produced by Wooyoo Media Lab and Studio Myungbulheojeon
• The official description calls it "a playful hyperpop track about the feelings that slip out no matter how hard you try to hide them"

Company statements with no independent way to check them

• Speaks more than 47 languages
• A fully realized agent musician
• Responds in real time on a large multimodal model

Things I won't write

• Phrases like "Korea's first AI artist". Precedents such as Han Yu-a, MAVE: and Eternity mean it doesn't hold.
• View counts as evidence of popularity. The channel has 4,370 subscribers while the debut video passed 500,000 views. Paid promotion is likely enough that the number alone says nothing.

There is still no independent press coverage of the second single. So the factual range of this piece is the official description, the music service registration data, and the sound we measured ourselves.

That's the last of the numbers. Now, the music.

67.7dB in a Quarter of a Second

I measured all 2 minutes 22 in 0.25-second windows.

There is no fade-in. From 0:00.00 to 0:00.25 it reads −76dB digital silence, and the window at 0:00.50 comes straight in at −8.63dB. 67.7dB in 0.25 seconds. The very first window is already at the song's average level.

And it stays there. The body (0:00.5~2:12.5) averages −8.84dB with the 10th-to-90th percentile at −11.5~−6.2dB. 89.6% of all windows sit within ±3dB of the median. The peak reads +3.57dB, over full scale.

It's a brickwall hyperpop master with effectively no loudness difference between verse and chorus.

The Same Device, Three Times

Three holes are cut in that flat master — at 0:13.50, 0:21.00 and 0:53.50.

For one window the level switches off to around −15dB while the 6000~11000Hz share shoots up. At 0:53.50 it reads 33.6%, against a song median of 2.25% — fifteen times. Then the very next window returns at −6.1dB with 20~150Hz taking 49~55%. 8.8~8.9dB in 0.25 seconds.

A noise riser sweeps the top, then it drops onto sub-bass. All three are the same.

Hyperpop, but the Top End Is Dark

Across 1:00~1:30 the dominant frequency is 51.2Hz, and 50% of the spectral energy sits below 149Hz. The 95% rolloff stops at 4.69kHz. The median for 6000~11000Hz is 2.25%.

Rather than the piercing top end the word hyperpop usually suggests, this song is pulled along by its bottom. The highs are concentrated in exactly those three risers.

The Last Eight Seconds Aren't Music

The song ends at 2:12.75. From 2:13.00 to 2:13.50 it falls −69dB → −83dB → −93dB into complete silence.

Then from 2:13.75 a separate tail runs to the end. It sits at −24.57dB, 16dB below the song, with 67.6% of its energy below 150Hz, a dominant frequency of 112.9Hz, a 95% rolloff of 417Hz and 6000~11000Hz content of 0.03%. A fully low-passed, video-only outro.

It's Worth a Listen

Set aside whether an AI made it: coming in at 67.7dB inside a quarter second and then holding 2 minutes 12 within 5dB is a clear decision. And the placement of those three risers isn't accidental either.

On earphones, try just the ten seconds from 0:50 to 1:00. The third riser is there.

For what it's worth, this magazine also works with an AI editor writing the first draft and the NONOL editorial desk reviewing and revising it. That's why this piece separates the company's statements from the confirmed facts so carefully.