Geo Synthesizer is crashing. Is there anything I can do? If Geo Synthesizer is not starting properly, try reinstalling the application. The easiest way to do this is to delete the app from your device and re-download it from the App Store. You will not be double-charged by Apple for this.
Does Geo Synthesizer support the Line 6 MIDI Mobilizer? Geo Synthesizer supports the second-generation MIDI Mobilizer (the MIDI Mobilizer II). It does not support, nor will it support in the future, the first-generation MIDI Mobilizer.
How do I get Geo to work with Sunrizer over Virtual MIDI? First, start Sunrizer and activate background operation. There is a button in the top-left corner of Sunrizer labeled "AUDIO BKG" that controls this option. Then, tap the home button to leave Sunrizer; it will remain running in the background.
Open Geo Synthesizer. In the top-left corner of menu 2, adjust the volume slider to zero to deactivate synthesis in Geo. It is important that the volume be all the way down to zero. Geo is constantly adjusting the audio buffer size to minimize latency, and this will interfere with Sunrizer if Geo's synthesis is still active.
In menu 3, tap the MIDI config button in the top-left corner and, in the MIDI configuration menu, ensure that "Sunrizer MIDI IN" is selected as a MIDI destination. Close the MIDI configuration menu.
At this point, Sunrizer is receiving MIDI from Geo, but it will not synthesize audio. Geo requests a low-latency audio buffer every time the app opens, and Sunrizer is unable to handle this low-latency buffer. Sunrizer also fails to request a properly sized buffer, so it just stops synthesizing audio. In the next version of Geo, we will provide compatibility options for apps that can only handle higher-latency buffers, but there's also a quirk of iOS that can be utilized to correct the problem with Sunrizer.
When headphones are plugged into or unplugged from the headphone jack of an iOS device, the audio buffer will change to a larger size. Because Sunrizer does not change its buffer size at all, and because Geo's synthesis has been deactivated, this can be used to get a larger audio buffer. Find a pair of headphones and plug them into the headphone jack. This should allow Sunrizer to start synthesizing audio again. If you do not wish to use headphones, you may unplug them immediately and Sunrizer will continue to synthesize audio.
How do I get Geo to work with SampleWiz over virtual MIDI? First, start SampleWiz and activate background operation. The button for opening the MIDI menu is on the far right side of the fifth ribbon of SampleWiz (the ribbon is the strip above the keyboard; the button in the top-left corner of the screen can be swiped left or right to change the ribbon mode). In the SampleWiz MIDI menu, the button that activates background MIDI is in the bottom-left corner.
Open Geo Synthesizer. In menu 3, tap the MIDI config button in the top-left corner and, in the MIDI configuration menu, ensure that SampleWiz is selected as a MIDI destination. Close the MIDI menu. You're ready to play!