@audphile1 no. The buffer is small. Usually 30sec to a minute. It isn’t local playback.
Trying to square this. My streamer has a 30 second buffer, so if Internet or it’s local connection is lost I still hear music for a max 30 seconds.
If the connection is down and it’s still playing, and the data is not local.... Where is it?
My desktop I use JRiver and have 1Gb of buffer going to RME> Genelec 8331a So the amplification is built in. So theoretically I can queue up entire PCM 16/44.1 albums without a network connection.

