Smilzo
Fractal Fanatic
Gap & istant are different things. Most real amps could be seamless, but not istant, some have a gap. For a devise to be gapless you should run two parallel circuit and "mix" them as fast as possible without popping, clipping, chirping or volume loss... be it analog or digital. In analog you need parallel channels (there are almost no modern amp with parallel channel, they simply add gain stages). In digital you have parallel processing. If an amp run 40% CPU and effect 30% (70% total) to have perfect switching you have to run a parallel amp (+40%, so total 110%!), wait for stabilty, then fade out first amp while second amp fade in. In a shitty amp modeling with 5% CPU they could run as many istance as needed. Maybe they stabilise faster, in a few ms. But now we know why many digital device deserve the "digital sounding and lifeless" title...