PhonoPaper is a camera app for playing pictures with encoded sound (PhonoPaper-codes). With this app, you can also create your own codes: 10 seconds of sound can be recorded from a microphone and converted into an image.
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Apps similar to Photosounder include PhonoPaper, which is free. Other options are Virtual ANS and spectrogram. In total there are three Audio Editors like Photosounder for Windows, Linux, Android, iPhone and iPad.
PhonoPaper is a camera app for playing pictures with encoded sound (PhonoPaper-codes). With this app, you can also create your own codes: 10 seconds of sound can be recorded from a microphone and converted into an image.




Virtual ANS is a software simulator of the unique Russian synthesizer ANS - photoelectronic musical instrument created by Evgeny Murzin from 1938 to 1958. The ANS made it possible to draw music in the form of a spectrogram (sonogram).




This program can display waveforms and spectrograms for audio files, as well as the reverse process, converting spectrogram images back into audio.
![A waveform and spectrogram of "[Formula]" from Aphex Twin's album Windowlicker, showing a hidden face.](https://img.alternativeto.net/s/309x197/jpeg/spectrogram_934921_full.png)