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★★★★★
(edited) I just discovered that I can playback a recording and watch the SPL in real time. The trick is to choose "Level" rather than "Spectrogram" in the bar menu first. Then go to ViewData, select a data file, select the audio tab, and then tap playback symbol (right arrow). Very nice feature. Think I found a bug, though: If I saturate the sound level with loud/close sounds, the SPL/Level display will say -INFINITY and the curve will saturate at +120dB for a while at the left end, but with a staright line down to the current level.. I was even able to crash the app with loud/close sounds. Seems like an overflow error is crashing the app. Overall very nice, but some small wrinkles.
★★★★★
I like the comprehensive set of features for recorded data, but disappointed that: 1) The GUI cannot flip upside-down. I use an external mic, which requires my device to be held upside-down when not using an extension cable. 2) I have to export in order to do calibrated measurements because there is no way to calibrate the frequency response for any mic used. Works with my external measurement mic (Dayton Audio iMM-6). I normally use an RTA, but this app has enough goodies in its analyses of recordings that I might see what I can record and then analyze (that is, anything *not* requiring a calibrated mic). Thank you for including a low-ish sample rate (8000 Hz) for those of us who work with frequencies in the musical notes region. My export shows 0.977 Hz bin size, which means you are using 4096 FFT bins. However, it would be awesome to also have sample rates at 4000 and 2000 Hz so we can afford finer resolution for working with very low audio frequencies when using an external measurement mic.
★★☆☆☆
I wanted to use this to teach the basics of acoustic phonetics. I wish it had a way to adjust the y axis from logarithmic scale, to change the direction of time flow, and remove information above, say, 5000 Hz. The font is tiny.
Technologies used by VisualAudio
VisualAudio is requesting 4 permissions and is using 0 libraries.
Permissions
Network communication
view network connections,
full network access,
Google Play billing service
Hardware controls
record audio
No known libraries used.
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