While the Walkman has been around forever it seems in some form or another, there aren’t a lot of hacks for this device. One of the problems is Sony’s proprietary ATRAC format. You must convert all MP3s into this format, and this is usually done via a MP3 conversion tool. It’s hard to hack this tool since you have to go through many lines of code to do it.
And, the problem with the ATRAC format is that once your files are converted, you can’t play them on other formats. Even advanced hackers have had issues adequately hacking this format.
But, you are welcome to attempt to change some lines of code, but it is labor-intensive. If you want to keep your MP3s the way that they are, get another type of player.
There is one final word of caution when it comes to hacking. Hacking your player could mess with how the player functions. Sony Walkman MP3 player hacks are not precise. You could crash your player. So, always back up the files before attempting any hacks. Also, you can also void your warranty. But, if you own an older model, go for it, especially if you are unhappy with things like the volume.