How do echoes in a normal room affect the quality of the sounds that we hear ?

Explanation

1) Echo is a reflected sound, arriving at the position of listener more than 0.1 s after the direct sound.
2) Quality is the characteristic of a sound which enbles us to distinguish between musical notes emitted by different musical instruments.
3) In a normal room. If echo is formed, we can hear multiple sounds, at same time.
4) Our ear cannot perceive and judge the sound from where it is coming.
5) So, quality of sound does not work here.