Digital Delay would work for this, just make sure the A/B mix is set in the middle so Delay A goes to Left channel and Delay B goes to Right channel. Also, make sure you do not have Tempo Sync activated, so you can achieve milliseconds of delay. Mod Delay is another algorithm that would work keeping the same principles in mind. But the best algorithm we make for width generation is the iconic MicroPitch algorithm. Not only can you adjust a stereo delay but you can also adjust pitch in cent increments. Together, pitch and delay variations will give you the widest image possible. Similarly, the H910/H949 algorithm is also capable of this.
