AudioPluginHost: adjust sample rate to match the audio device profile

[atsushieno]

taking over #14

JUCE AudioPluginHost is still weird. OB-Xd always crashes. Any other synths generate sound, but their key is weird. Also it frequently crashes.

It is not limited to JUCE-based synths. mda-lv2 synths are also suffered.

[atsushieno]

OB-Xd does not crash anymore.

[atsushieno]

The output key, actually output frequency, was weird because AudioPluginHost initializes sample rate at 44100 while it must be consistent with the Android audio device profile. Either my latest development environment (linux desktop) or the latest emulator is configured to run at 48000, and if I adjust audio device settings to it, the output became alright.

[atsushieno]

As of July 11th I was still on my previous dev. laptop, so it is more likely due to emulator changes.

[atsushieno]

As of v0.7.6 it seems still problematic. On my Pixel device I still had to explicitly set the sample rate to 44100 (from 48000) to get the right output, on aap-juce-simple-host.

However, it seems to only apply to aap-juce plugins. aap-lv2-string-machine had no problem.