Adding upmpdcli as a client for Logitech Media Server

[hkphantomgtr]

I'm new to Pi. No options for clock. With "normal" mobo/CPU hpet, tsc and another (I think) were available. TSC sounded best in all such previous systems I owned. I would always see the USB irq popping up in the top of TOP and would set it to rt but with this Pi4 and MPD I can't identify any IRQs coming up in TOP.

ic.  For the clocksource, in my previous fanless PC, TSC produces more sensational sound for some soft and small scale music, such as a vocal with a piano, or a single instrumental solo.   But the beat "seems quite drifting", esp. when listen to some larger scale music, e.g. orchestral, band sound.   Hpet is reverse.   In terms of latency value, TSC gives very low latency value, it's almost half of hpet in my previous and current fanless pc.  

For the IRQ, may I suggest than you stream and play a DXD file, and watch the "TOP" during playing?  I hope that'll be helpful.