Sounds Great...

...but lacks a mixer.

Edit: I went back to this review to change my rating (before it was 4 stars) because what seekbeat does it does really great. Yes, I am still missing a mixer, also Id like to have automation of envelopes or at least some kind of decay automation. But for what seekbeats is at the moment, its probably the king among the drum synth apps on iOS?

Tian min about SeekBeats Drum Machine Synth, v1.2