Here’s the answer I got from McIntosh:
Digital signals have a bit in them that tells the DAC what format is, it takes the DAC a second to figure it out. If the DAC decodes wrong because formats changed, and it has not seen the bit yet, a burst of noise will come out for a half second or so until the DAC switches decoding modes. So, DAC’s mute for a second to avoid this.
If you play a CD, you will notice that tracks typically have a couple seconds of silence and the music starts at about 0:02, not 0:00. Many download files have forgotten about this and start music at 0:00.
If your music player can be set to insert a little silence between songs, that issue should be solved.
End of message
After thinking about it, I can understand that if the audio as to be synchronized with video (if there is a video source at the same time), I could understand that they need that time to switch to the correct encoding type and keep it synch with video…
I have the C52 for two weeks now. I think I can live with that…