If you already have TMCC, either a BASE1/CAB1 or one of the Legacy systems, you just need the Lionel 6-37146 Legacy Powermaster, that allows you to run the PS/1 and conventional locomotives from the TMCC/Legacy remote.
John:
I already have TMCC and I can run my PS (“PS-1") loco with my TMCC CAB-1 hand-held controlling the voltage to the track through an older Powermaster in conventional mode, but it runs without any sounds.
If I understand your post above, I can buy a Legacy Powermaster and I will then be able to get the sounds when running a PS-1 loco in TMCC? I’m using post-war ZW’s for power if that matters.
Bill
We should wait for John to answer but... I am pretty sure a buddy of mine once had the original cab 1 system and an original powermaster. He had sounds on PS1 locomotives. I am 98% sure.