Thank you, Dynobot. I think I managed to apply the advice.
Now the problem that I find with this excellent software is different in nature and I talk about it because it can be acceptable that a music lover could (should?) Be familiar with the English language. But I do not think it's normal that a music lover should become a programmer in order to use Linux Runeaudio the way you want. As a user (so I consider me) what should be the normal music lover, I saw that Runeaudio has already embedded some features of which I don't understand the indispensability while (by contrast) to enable other functions that I judge that it are reasonably necessary, to enable these features is needed to be an experienced Linux user, which for those who have no experience so far with Linux is somewhat tricky. For a music lover can be a normal thing to enable a TFT display instead of another, to make a search in a database of song titles, to switch a musical tank as a hard drive or an USB drive, to enable a DAC instead of the onboard outlet jack 3.5 mm (eg. of a Raspberry board), a remote control or something like that, but can't to be indispensable to become an expert user Linux to achieve and manage the device via SSH to enable these simple and obvious features. This may be acceptable only for ANY music lover who is also fond of computer science. I think it right if I conceive the use of RuneAudio (complete with DAC) only by the music lovers. To listen to the .mp3 there are already several years billions of devices from poor audio quality on sale a few euro. I hope to be understood for what I'm saying. Obviously will agree with me only purity music lovers, I don't hope to obtain understanding from those who use also Linux systems because for Linux users is easy to enable anything on a software ....
THANK YOU