https://crypto.com/us/glossary/sound-wallet
Sound Wallet - Crypto.com
A sound wallet in cryptocurrency is a novel way of storing private keys using sound or audio.
sound walletcrypto com
https://soundwallet.net/
Sound Wallet - Your private audio key with high security
In the sound is a private key of a brain wallet with a simple password. Decode and guess the password.
sound wallethigh securityprivateaudiokey