<<< That depends on how you record. Are you recording the two vocals, and keyboard simultaneously? If so then you will need at least four inputs and the Behringer that Charlie suggested will work. If you record one at a time then the $29 Behringer that I previously suggested will work. >>>

Mario is absolutely correct in the above statement in regard to recording to a DAW and placing each element (vocals, guitars, bass, and individual drum pieces - kick, snare, toms, cymbals and so on)of the recording on its own track. This gives you total control of your project.

But, in conjunction with the mixer you own, by recording through the mixer and sending the mixer output to the $29 Behringer inputs will record the two vocals, and keyboard simultaneously. Adding the audio interface offers you more benefits and options. You get the benefits and options of a mixer and an audio interface and the ability for the two to transfer tracks back and forth between the two and utilize the features of each.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.