Firstly, sorry for my poor English… 
I am new to Volumio, where I have just upgraded myself from Chromcast audio… Unfortunately I am now having exactly the same issue as above.
I am using:
Volumio version 2.526 (latest)
Allo digione - using coaxial output
DAC: Audiolab MDAC+
It appeared that the ‘cut off’ during the first few second of the song is causing by the PCM ‘switch off’ and on between tracks. It doesn’t matter if I am using the nas, or USB… and it is even a a bigger issue if using the Spotify connect, as it happened to every single track!
You can observe the symptom by monitoring the DAC display (if it have a one) where it will become ‘unlock’ , and ‘will lock’ again after the song has been started for a few seconds, which essentially causing this ‘cut off’.
Apparently this is an old issue, as I have done some research and discovered a couple of discussions with the same problem. A few people have already requested for a fix or looking for an alternative solution:
[always-pcm-signal-dac-t2159.html](https://volumio.org/forum/always-pcm-signal-dac-t2159.html)
[github.com/volumio/Volumio2/issues/1668](https://github.com/volumio/Volumio2/issues/1668)
I would suggested that this can be fix if there is a way to make the volumio to keep the PCM connection to become ‘always on’.
I have done some experience by switching back to use the Chromecast audio (with Toslink), and have observed that the Chromecast audio did actually keep the PCM connection always on, hence this issue never happen.
Further more, I have done a control experiment by using a CD player with coaxial to drive the Audiolab MDAC+, and appeared that it did not ‘switch off’ the PCM connection between tracks… This experiment proven that it is not cause by the difference between Coaxial and Toslink.
Clearly I am not the only one who suffered from this issue, and I would like to know if Volumio can help us to resolve this problem?
Or perhaps to provide a ‘PCM always on’ or ‘keep PCM connection’ option in the setting so that the user can select based on they system requirement?
Many thanks. 