Quite puzzling finally is the denomination labelling itself as Christian, dominating in central Illinois and Indiana. I thought they all were. Christian, that is
Campbellite restorationist would be my guess.
The non-instrumental Christian church doesn't believe you should use any form of musical instrument not named in the New Testament ~ which is why they sing a'capella.
Every time this question is brought up we find various Freepers who do or do not include the non-instrumental congregations in the Restoration circle.