Digital is still digital, but what I meant by too digital is that its sounds too sterile, hollow in my own term. Though nowadays amp sims are getting better, if you are not too anal about sound they can pass off as the real thing quite well. Modulations are your effects like delays, reverbs, flangers, chorus etc.The AX3000G as I said are not that bad. Some people even used the AX3000G for the modulations and bypass the amp sim totally.