The sound is implemented based on a mechanism that generates noise by generating square waves of very low frequencies (infrasonics) in the 1-16 Hz range, which are generally not audible.

The concept is to express the dynamic sound of the blockchain, which humans cannot hear.

The sound data is generated generatively in full on-chain from the three seed values.

• Issued chain
• Chain where NFT currently exists
• The block number of the issuance and token ID

The Genesis block hash of the issued chain is used as the seed value for the square wave's duty cycle. And this issued chain seed data is also traversable with NFT.

The sampling rate is set by the genesis block hash of the chain in which the NFT is currently present, so the sound quality varies depending on which chain it is in.

Also, each token ID has a different frequency setting; the lower the frequency, the slower the beat, and the higher the frequency, the faster the beat.