Creating an accurate monitoring environment is part art part science. There are many factors that contribute to the the difference that you and your client are hearing. If you’ve ever sung in the shower, you’ve probably heard how certain notes resonate and sound very full and present. This is due to standing waves which occur at sound frequencies defined by the dimensions of your shower. When you hit that certain note, it sounds great.
However, it’s not great when this happens in a listening environment. And in untreated rooms, it happens all the time, although, usually not as dramatically as in the shower. The distance between parallel opposite walls, and floor and ceiling cause effects at certain frequenies. The objective in designing a proper listening environment is to eliminate all these unwanted effects. You do this by using devices that absorb, refract and diffuse sound. But, it has to be balanced. The bathroom is a very “live” environment (many reflections). A heavily draped and carpeted room would be a “dead” environment (less reflections). The best listening rooms have a combinaton of both dead and live elements.
I suggest you look at https://www.rpginc.com/. RPG sells many products that are used in various environments to control sound – listening rooms, recording studios, concert halls. There’s a lot of terrific information about acoustics on their website https://www.rpginc.com/research/index.htm. They are very helpful on the phone.
As to your current problem, there’s no easy answer to what’s happening. You could be listening to excellent monitors and your client might be listening to cheap speakers. Your room might be dead and his live. You might be listening very loud and he could be listening at lower levels. Your monitors could be near-field and his set back. All these factors affect how the audio is perceived.
The best approach is to try to make sure your monitoring environment is “right.” There’s no way to ensure every listener will hear the sound the way you do in your edit room or studio. BTW, the same thing is true of video. You have no control over what the viewer is watching your program on. It could be a ten-year old TV or a brand new HDTV.
John
Dual 2.5 G5 4 gigs RAM OS 10.4.3 QT7.0.3
Dual Cinema 23 Radeon 9800
FCP Studio 5
Huge U-320R 1TB Raid 3 firmware ENG15.BIN
ATTO UL4D driver 3.50
AJA IO driver 2.1 firmware v23-28
SonicStudio HD DAW, Yamaha DM1000, Genelec Monitors