Probably a valve is out of alignment.
Silent, muted.
The cause of a Xbox 360 to stop playing sounds when a DVD is in it could be that the sound is turned down or has been muted.
Sound can be removed from a Youtube video if the sound is not owned by the maker of the video.
There will be no sound if the computer has been muted, or the volume is too low, or the sound card is faulty. Try using headphones to check if the sound is there.
You may need to check your volume under settings to be sure the sound hasn't been muted.
Check first if speakers are plugged in and turned on and if they are muted.
The sound can be faint in the first place; after moving for some distance it may become dispersed over a large area; and part of the sound may be absorbed by walls, trees, or just about any other matter.
You can improve the sound quality of your music by adjusting the muted bass to bring out more clarity and depth in the low frequencies. Experiment with different levels of bass to find the right balance that enhances the overall sound without overpowering other elements of the music.
It would be very unusual to use "echo" (meaning the reflection of a sound) in a possessive manner in normal conversation. I suppose you could say:- The echo's sound was muted (=singular possessive) or The echos' sounds were muted (=plural possessive)
A sound in such a low whisper that you can barely hear it.
Faint, Ain't, saint, complaint,
anomaly the faint instrumentation if some thing like a not to hard blow on a flute or a clarinet or sometimes you can put special kind of mats on drums to make a faint sound