VoicePrinter app for iPhone and iPad

Sound is decomposed into two dimensions and displayed continuously over time.
The premium version offers a new style of audio recorder/player.

This app can be used for analysis of
Human voice,
Environmental sound,
Sound of animals,
musics,
etc.

The specifications are as follows.
Sampling rate = 10000 to 44100 Hz
Display maximum frequency = 1000 to 22050 Hz
Display time range = 2 to 10 seconds
Frequency axis display resolution = 100
Time axis display resolution = 10 / sec

From version 1.1, recording, playback, import, and export functions based on sound and voiceprints can be used by in-app purchase. In this case, banners will not be displayed.

The premium version allows recording, playback, import of external sound source files, and external output.
・Record under the following conditions
Sampling frequency = 10000~44100Hz
・Display audio analysis results under the following conditions (audio is played in sync with the analysis screen)
Maximum display frequency (high-pitched display frequency limit) = 1000~22050Hz (half the sampling frequency or less)
Display time range (time that can be displayed on one screen) = 2~10 seconds
Frequency display resolution (frequency axis: number of data displayed on the vertical axis) = 200 points
Time axis display resolution (time axis: display interval (pitch) on the horizontal axis) = 50~200ms (10~200 points)
・Importing external audio source files
Imports 16-bit linear PCM mono audio sources. (In the case of stereo, only 1ch is imported.)
・External output
Outputs as 16-bit linear PCM mono.

*To input and output data to iCloud Drive, you must enable iCloud Drive in System Preferences.

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