We never found a solution, we ended up not loading music...Just voice! The NEC phone system is the only phone system we've ever experienced this issue with. We use standard MoH equipment across the board and we follow the manufacturer's file formatting guidelines. To me, it sounds like the phone system is having an issue processing and distinguishing between voice and music, so it is making "Its own adjustment" resulting in the distorsion we are hearing during music playback. We have already tried many different music compression and frequencies, but so far the distorsion still remains

Does the NEC 2000 has automatic audio volume amplification feature?


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