Preset not working if no audio device present

[HorstBaerbel]

Operating system and application version

• OS: Fedora
• Version 3.29.1

Describe the bug
I have one machine that has no input devices except an USB audio interface. When the USB interface is not connected I can load a preset, but nothing is rendered

To Reproduce
Steps to reproduce the behavior:

1. No audio device in system
2. Start modV
3. Load preset -> Nothing rendered

Expected behavior
modV works without audio devices

[2xAA]

Currently modV requires an audio device to work, it is an audio visualiser.