I will be confused when memories the lyrics song at the same time and have to remember the melody too. And because the BIP39 seed word is unavailable in my local language, I shouldn't follow your suggestion. It's hard to memorize the lyric song where you unusually use that language. Are you creating another backup?, if not, you have to prepare to lose the money.

I wouldn't advise people to memorize things like that, especially secret keys that can be used to access valuable private data or assets. People could give them away sub-consciously or in the dream. I have no problem with memorizing public info, or private info that is not too valuable

Nicely done. But, not everyone is as talented as you to be able to write a song with some random words.

I would love to do something like this with my seed phrase tho.

However, hope you know that writing a song with your seed phrase doesn't guarantee that you will remember it. You might still forget a word or two, so my best bet is to write it down on paper, that way you never get to forget except you misplace the paper.

As long as the song is really nice and easy to sing, it will make you easier to remember your seed phrase. The thing is your seed phrase is randomly generated, you would get a word that you didn't really understand the meaning or really hard to include it for your song, this make it's not good to write a song with your seed phrase. Don't really depends with your song, you need to back up your seed phrase using steel plate or other solid material.

Though it should never be the one of the main ways of storing a seed phrase, I wouldn’t discard it’s use under certain circumstances. Say for example one needs to flee from his country, wishes to keep his seed handy, but has a chance that anything physical he carries (cyphered or not) can be confiscated or stolen along the way. One could try to memorize it, and a poem or a song seem like the easiest ways to convey the seed to memory, though it has to be well committed and tested, and it’s certainly not exempt from risks.

Often though, people may have more than one seed, and the song scenario is likely not going to be feasibly scalable to accommodate more than one seed. Additionally, one has to make sure not only to include the words from the mnemonic in order, but also to asses that he doesn’t include additional words from BIP 39’s wordlist alongside those from the seed in the said song.

That is not something that works always,how many times our memory fails us in the most important part of an exam for example,the same thing can happen to your seed if you forget about it after a long time of creating such a melody.

What I do is to keep 4 words of the seed in an offline Laptop that I almost never use,4 words of it in my phone and 4 words of it in a document in another PC to make it difficult for attackers while I have access to all these devices.I have also a small safe and a paper with all the 12 words if anything bad (failure) happens to my devices.

Using your seed phrase in such capacity is not bad but I think being able to keep memorizing it on daily basis is. Can you be able to do that every day as long as time passes by in years as the case maybe as long as you have that wallet in usage. Come to talk of it, there are lots of activities one gets him or herself involved in on daily basis so tell me if you get entangled with things on daily basis would you be able to memorize your key phrase everyday after a hectic time and keep doing this over and over. The best thing you can do is to keep record of your seed phrase in a particular place where only you can access it at any point in time while you do your memorising work as that phrase is the key to your assets.

Well, it could be. Obviously, users here have already mentioned the memory problem, however what about not adding enough entropy. Since, seed words are well known at this point, and it's open source anyhow. Therefore, if you don't put words that are in that list, and aren't part of your seed, the entropy is actually terrible. Obviously, this only goes for if you're writing this down, but generally to remember something as complex as this you'd need to write it down.

Besides, as long as you look after your physical security, then you don't need to complicate things further by doing something like this.

I find the general idea of hiding a pass phrase in art appealing. A friend of mine once used a fictional text and inserted the passphrase there as words of one character where a character did not speak clearly. It took some time to find the phrase, of course, but it's possible when you know where to look. Making a song with the words also sounds like a creative idea, but if a song is known to anyone, people can probably brute force the pass phrase quite fast (given that all the right words are already in a very small text), whereas if a song is only known by the person who made the lyrics, there's a good chance of just forgetting it. Have you never written some poetry but have now zero idea of the words in those verses? I think it's a pretty common issue, unless one has an incredibly reliable memory. With mine, I wouldn't risk it.

Good point on entropy from Welsh, and I would add that adding an extra word or two, particularly in non-english languages with recognised romanised spelling, to yr phrase can help with that, can help with a song, and anyway deters cracking using recognised dictionaries.

I don't know well enough if that's bad practice but no one has ever pointed out to me it is, I do know that it has been pointed out it doesn't actually improve the security of an already properly randomised seed selection.