If your radio is narrowband and others are also narrowband the audio should be pretty much normal. If your radio is narrowband and the others are wideband, your audio may sound distorted to the others and their audio may sound quite low to you. If your radio is wideband and the others are narrowband, their audio may sound low to you and your audio may sound distorted to them. If all are wideband, things should sound fine to all. If all are narrowband, things should sound fine to all. That's just how things are.
Changes should be made so all are switched at once for things to sound normal. Often this is done by programming the radio for both wide and narrow (e.g. 456.0 wide on channel 1 and 456.0 narrow on channel 2) and everyone uses channel 1 prior to the switch and they all use channel 2 after the switch. Later on, all radios can be reprogramed with only the narrow channels so folks don't forget and use the wrong one by mistake.