Sequencer Rack 2(Retro) app for iPhone and iPad

Sequencer Rack 2 (Retro) is step sequencer app looking like a small machine. Geared with pure vintage acoustic sounds. Banjo, guitar, synth, bass and drums!
It has 16 voices that can be used in 16 patterns. It is very easy to create music and beats with it. However the sequencer has its limits.

Features:
- 16 different sounds
- Chords in C major
- Melody pads that can play the current chord
- 2 effects (Stone Echo and virtual speaker)
- export to .wav file
- sound pitch control for every sound
- can play sounds backwards
- tempo BPM control - select beats per minute
- volume control
- can play in loop
- pads volume control