Change the selected track's instrument by tapping an instrument from the scrollable list.
Tap a folder in the left list to filter the instrument list by category, to view your “User” instruments (see the next chapter), to view installed Inter-App Audio instrument apps (see the chapter about Inter-App Audio.) or to access the in-app instrument shop.
Tap the User folder to display all your custom instruments and the Create (+) button in this section to add a new instrument with the sampler. A small edit icon sits in the right column next to the selected user instrument. It displays a menu with four buttons:
The volume fader sets the current track's gain from 0% to 100%. It has the same function as the volume fader in the track editor.
The attack offset is the point in the sample where playback begins when a note is triggered. Imagine how a piano would sound without the loud attack at the beginning. Moving the offset fader to 10% cuts away the beginning (i.e. the first 10%) of the sample and you will hear a very strange piano sound. This can be very useful for transforming a slow synth into a lead sound, or cutting the attack of any instrument.
The attack fader sets the attack time in seconds, which is the fade-in time, i.e. how long it takes for the instrument to reach its maximum volume. Use longer attack times for soft sounds like strings and synth pads.
Set the release time in seconds with the release fader. It’s the fade-out time, i.e. how long the sound fades out after a note is released. Use longer release times to simulate legato or one-shot for drum kits and percussive instruments.
Tap the lower row to switch to 2 keyboard rows. This selector then allows you to switch between the rows to select different instruments for the upper and lower keyboard row. See this section about the track created for the lower keyboard row.
On the iPad, a lock beside the keyboard row selector indicates if the two keyboard rows are linked. If the lock is closed, the settings (instrument, volume, attack and release time) of both keyboard rows will be held in sync. Every change you make will affect both rows (meaning two tracks).
The default button resets the four faders to the instrument's default preset. Note: If "Keep attack/release times" is disabled, this button is automatically pressed each time you select an instrument.
Tap the preview button multiple times to hear different notes played with the current instrument.
Enable the Keep attack/release times checkbox to freeze the state of said faders while browsing the instrument list. If this checkbox is disabled and you select an instrument from the list, its default attack and release time will be applied.
On the iPhone, this setting can be found in the general setup.