Recording new sample from input, in time with existing sampl

[Andean]

Im wondering if there is a way to record only from the line in, but while playing back a sample that exists as to overdub a new sample, without resampling the existing sample, into the new sample.

Like sample a bassline from my synth to pad 1, while playing in time to a loop on pad 2.

Thanks

[aadu3k]

Unfortunately not.