Hesa Fredrik alarm test 2023-09-04

The Hesa Fredrik civil defense alarm horn system across Stockholm is tested 4 times a year. It also gives a chance to test and compare different microphones.

Featured microphones:
- Shure MV88+ (Mid-Side, plugged to the phone recording the video, 256 kbps audio)
- Audio-Technica AT8024 (Mid-side Shotgun, plugged to a Zoom F3 with a 3.5mm stereo TSR to XLR, Phantom to Plug-In Power adapter: Sound Professionals SP-XLRM-MINI-2-PHANTOM)
- Zoom MSH-6 (Mid-Side, on Zoom F1)
- Zoom H3-VR (A-format converted to AmbiX, then to Binaural stereo using the IEM BinauralDecoder)
- (Also featured a Zoom H5 with the XYH-5 mic capsule, but this turned out to be broken, so it's omitted from the test)