WBMX 104.1 HD4, when it first came on just over a month ago, WAS airing the "New Age" talk network "Sky Radio".
This was formerly on WBMX 104.1 HD3, which is now airing the "Mercy Rock" contemporary Christian channel, which was formerly on WODS 103.3 HD3.
WODS 103.3 HD3 went all-Christmas the week before Halloween, that's when "Mercy Rock" was moved to WBMX 104.1 HD3, and when WBMX 104.1 HD4 first appeared with "Sky Radio", moved from their HD3.
Reception of "Sky Radio" on WBMX HD4 was so spotty and intermittent even in the immediate Boston metro, even where WBMX HD1, HD2 and HD3 were strong and steady, that I wasn't sure whether they recently stopped airing the programming and have been airing "dead air", or whether my receivers simply were failing to demodulate it.