Latency is something that can't be completely avoided when entering and leaving the digital domain.
Imagine: you play a click to the singer, but this click is already a bit delayed due to the digital-to-analog conversion, the singer sings to this and then it's being recorded, again a bit delayed by the analog-to-digital conversion. Usually your DAW (and Studio One is quite good at this) would compensate for the overall latency, but not all interfaces and even the OS do always report their latency correctly to the DAW.
But fear not, there is a FREE tool for Mac and Windows that's brilliant for measuring roundtrip latency:
oblique-audio.com
You can then go to Studio One's Settings => Advanced => Audio and set a negative pre-record value based on those settings.
Imagine: you play a click to the singer, but this click is already a bit delayed due to the digital-to-analog conversion, the singer sings to this and then it's being recorded, again a bit delayed by the analog-to-digital conversion. Usually your DAW (and Studio One is quite good at this) would compensate for the overall latency, but not all interfaces and even the OS do always report their latency correctly to the DAW.
But fear not, there is a FREE tool for Mac and Windows that's brilliant for measuring roundtrip latency:
Oblique Audio - RTL Utility

You can then go to Studio One's Settings => Advanced => Audio and set a negative pre-record value based on those settings.