The overall performance of Cubasis depends on many factors such as the processor, the available RAM and the free hard disk space of your iPad as well as the sample rate setting, the number of tracks and the instruments and effects used in your project. Please note that the CPU-meter in Cubasis shows the complete workload of the iPad, not only the workload of Cubasis.
In addition, using inter-app data streaming technologies such as Audiobus and Inter-App Audio along with the number of assigned instrument apps has a significant impact on the performance of your iPad. When your system is overloaded and reaches critical values problems such as distorted sound, timing problems or other issues are inevitable. So depending on the iPad used and the complexity of your project you will eventually reach these limits sooner or later.
A few observations:
- Older devices obviously reach their capacities substantially faster than current models.
- CPU-demanding instrument apps significantly increase the system load and decrease the responsiveness.
- Running multiple audio apps in parallel or connecting apps via Inter-App Audio and/or Audiobus increase the system load drastically.
- Micrologue uses significantly more CPU power than MicroSonic
There are several possibilities to avoid performance issues:
- Reduce the number of instrument tracks (especially Micrologue) and effects used in a project.
- Reduce the polyphony by lowering it in the setup and in every Micrologue track. Also lower your song’s polyphony requirement by reducing the release times of instrument tracks and the number of simultaneous notes.
- Use as few apps simultaneously as possible.
- If you use Audiobus, set the buffer size to 512 in the Audiobus app.
- Use the freeze function to render instrument tracks into audio tracks.
- Make sure to unload instrument apps correctly after freezing them (otherwise they remain active in the background).
- Make sure there are several GB (ideally more than 20%) of free disk space available. Disk performance is reduced if the disk space is close to full.
- Quit all audio and non-audio apps by double tapping the home button and swiping them up.
- Reboot your iPad from time to time by holding down the home and power button for about 10 seconds until the Apple logo appears.
- Find a good balance of instruments and sounds that does not stress the CPU too much.
Please note that these limitations are inherent to iOS. We tested similar settings with other competiting apps and these performance problems also appear there if you drive the system to the limit. With Cubasis it is easier to get to the limits of your iPad because it is easier to seamlessly combine many different apps (effects and instruments) using Audiobus and Inter-App Audio with the internal instruments.
As iPad are getting more powerful we expect these iOS issues to gradually fade out over time as iOS matures (not long ago iOS did not even support multi-tasking!).
We will continue to improve Cubasis with regular updates like in the past to give you the best music production system in the world of iOS apps!