ACX wrote:I expect the playback of a uncompressed (and bigger) file to be more problematic than a compressed one on the Raspberry Pi when played from a NAS, because of its shared USB/Eth bus bandwidth limits. Are you playing from a network mount?
In my own experience with ARM devices the shared USB port for audio output and reading files is a problem. I've already used a Seagate Dockstar with USB DAC and USB hard disk. This results in low volume clicks and pops during playback. It did not happen very often (maybe once a minute) and can be heard at quiet music parts only. Most users probably won't even notice them.
I had similiar results with a Raspberry Pi and USB DAC. Maybe some kernel parameters can improve the situation but actually I think the hardware configuration with the shared USB is just not the right thing for a real HiFi device.
I've ordered a Hifiberry I2S DAC and hopefully this is the solution for the USB limitations.