Napo's user interface is built from a set of specialised main views, some of which have associated helper views. You select a main view by tapping an element of the icon bar that is displayed at the bottom of the screen:
These are the icons (GLYPHICONS, by the way) and their respective purpose:
This is to display
view, which shows the stop, tremulant and coupler knobs and some
other frequently used buttons.
iOS: The Console view can also display onscreen keyboards. Tap the icon repeatedly to toggle between the stops display and a combined stops and keyboards display. After long-tapping the icon, an action menu appears which makes it possible to switch between the abstract and the authentic Console view and between the full view and the quadrants view. The latter can as well be done by pinch gestures in the stops display. Starting with Napo 5.1, the action menu also offers a function for configuring the format of the onscreen keyboards.
macOS: A separate window is used for the screen keyboards. Click the icon to open this keyboards window. After long-tapping the icon it is also possible to switch between the abstract and the authentic Console view.
|This is to display the Combinations view, which allows you to edit combination banks and combinations. A combination is a kind of bookmark, so we chose a bookmark icon.|
|This is to display the Recordings view, where you can listen to and administrate your audio recordings or other audio files uploaded to the app.|
|This icon is to display the Demo view, which lets you play some demo pieces that are included in the app.|
|This is to display the Gallery view, where you can enjoy images of the organ, the church or concert hall or its surrounding.|
|This is to display the Settings view, where various kinds of app settings can be edited. Long-press the icon to access saved settings. Furthermore, in iOS you can after long-tapping toggle between allowed and forbidden background operation without having to change to the Settings view. In case of allowed background operation the icon is shown in green color:|
There are some more elements that are common to all of the above mentioned views. Which of these are actually displayed, depends on the settings made in the Settings view.
- Load: This display in the background of the icon bar yields a measure for the time which the app needs to generate the audio data. When the load display approaches the right border of the icon bar, the app does not manage to generate audio data fast enough. This state is signalled as a CPU Overload or Reverb Overload condition (see below).
- Playing voices: The number of currently playing voices is shown at the right bottom. Only the pipe voices are counted here, but not the blower noise (one voice), the keys noise (one voice per pressed key) and the knobs noise (one voice per active knob), whereby the latter voices are needed only when the sample set includes the corresponding sound files and the according sounds are activated in the Settings view.
- CPU, I/O and Reverb overload: A CPU overload means that the app could not complete the generation of a packet of sound data within the available time frame, while an I/O overload means that data was not loaded from the SSD fast enough. A Reverb overload can occur if you use convolution reverb with impulse responses that are too long to be processed by your device. These overload conditions lead to degraded sound quality or even to interruptions of the sound.
- Overdrive: A horn symbol is shown in the mid of the window if the sound gets too load and is overdriving. In the Sound section of the Settings view there is a section concerning the handling of overdrive situations.
- Message log: At certain events, for example when a MIDI device is being connected, a suitable message is appended to the log and the log is displayed. This display disappears after a short time, but it can as well be removed by tapping. Up to ten of the most recent messages are available.
The log can at any time be requested in the Settings view by using the Log button. Then it does not disappear automatically but only when you tap it, use the Log button once again, or change to another view.