A simple (and somewhat inaccurate) VU-style audio meter.

I noticed there was no audio meter in F-Droid, so I thought I'd build one.

The app offers a few ways to calculate the audio level to display:

• dBFS: Decibels relative to Full Scale.
• RMS: Root Mean Square. This is arguable the most correct, but it is a little insensitive at low volumes.
• LogRMS: Natural log of RMS: My first attempt to even out the scale. It's a little too sensitive to noisy mics.
• SqrtRMS: Squareroot of RMS: My second attempt to even out RMS: it seems to works best.
• Max: Simply find the loudest bit of each sample. Most responsive, but will peg the scale on noisey places.
• Avg: Simple average of the sound.

Future Features?

• Allow a log of the readings.
• Fancier display options.
• Peak markers.
• Take background noise into account.