Hi, Although I just installed this useful mobile application, however I think that this problem should be common for all mobile gadgets due to a very basic short epoch midi audio banks used. This mobile application is very similar to PC Band-in-a-Box application, which I have been using along last ten years, and must also generate real-time midi stream, which is further used to convert to real-time audio signal via midi audio bank. The smaller the bank - more poor audio quality you get. I`m not sure, but i think that it might be a good deal to check google store for good quality midi banks. This is generally common problem for all applications. Probably, this helps.