I've never had any crackles or note drop-outs, but I have ipad pro 10.5 so I am sure the extra RAM helps out a said: If UVI are listening then first - thanks for the recent update - the sounds are a whole lot better and arguably the best piano sound available on iOS, BUT the above problem (along with adding Prevent Screen Lock and restoring the midi volume control) are necessary to bring this piano into the professional league. It makes no difference whether you use the iPad/iPhone headphone jack or an audio interface that by-passes the iOS DAC. This happens around every 40 seconds or so - depending on the settings chosen. So it seems as you play you run out of -loaded samples and when it refreshes a crackle sound is heard. It is the same sound you can hear when you go into options and choose a different sample rate/audio buffer and samples are forced to reload. Periodically there is a crackle that I think is probably the reloading of samples. I was wondering if anybody else who has this piano is having the same problems. This piano has a very nice sound but still has a few glitches that need fixing.