The current version of VICE can't emulate two different SID chips, i.e. one
6581 and one 8580, as required by this musicdisk. You can still run the
program on a machine with two 8580 chips, but it won't sound as intended.
Select mono output (-soundoutput 1) to mix the output from both chips:

x64sc -sidextra 1 -sid2address 0xd500 -soundoutput 1 lft-machine-yearning.d64
