The page horizontal lines show length of one quarter-note.
Click any blank area to create a note.This acts as a virtual instrument.
If in microphone mode, it will display a representation of what the app hears.
If recording, whatever is played/heard will be entered into the sequence for the current channel.
Here you can select which Instrument is allocated to which channel. You can also adjust the levels of each channel.
While playing you will see peak meters active.
For an instrument to be available it has to be loaded into a program slot. (see "Instruments" below)
Should a channel have no notes, it will show dulled.
Instruments are loaded into program slots.
Channels will be able to use these slots to play from.
Once you download an instrument set it will be saved locally, so that you may use it even when offline.
This is were you can load/save/export songs.
Songs are exported in MIDI format. This enables you to freely use your compositions in many other tools/instruments/mixers etc.