What image formats are supported?

You can upload PNG, JPG, WebP, and BMP images up to 25 MB.

What is the difference between linear and logarithmic frequency mapping?

Linear mapping distributes frequencies evenly across the vertical axis, while logarithmic mapping allocates more detail to lower frequencies, matching human hearing.

How does the tool map image pixels to sound?

It treats the horizontal axis as time, the vertical axis as frequency, and the brightness of each pixel as the volume (amplitude) of that frequency at that moment.

Which audio formats can I export?

You can export the synthesized audio as a 16-bit PCM WAV file or a lossless FLAC file.

What is the purpose of the verification spectrogram?

It renders a visual representation of the generated audio so you can confirm the image successfully reconstructed without needing external analysis software.

Elysia Tools

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Media

Image to Spectrogram Audio

Convert a bitmap image into reconstruction-first audio designed to reappear in a spectrogram, then export the audio and a verification spectrogram preview together.

Details

What this tool helps you do

This tool treats image width as time, image height as frequency bins, and brightness as amplitude. It synthesizes mono audio from that time-frequency map, then renders a spectrogram PNG so you can compare the reconstructed result against the processed source preview.

Execution

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Prepared example runs

Click an example to fill the form automatically. File inputs still need an upload.

2 examples

High-contrast glyph image reconstructed into WAV

A black-background bitmap with bright strokes mapped into a 640 × 160 time-frequency grid, then exported as WAV with a matching verification spectrogram.

<div class="is-wrap">…audio player, processed source preview, verification spectrogram, and reconstruction metadata for a WAV export…</div>

Log-frequency FLAC export for denser upper detail

The same bitmap rendered with logarithmic frequency spacing and FLAC output, useful when the upper image region needs more visible spectral detail.

<div class="is-wrap">…FLAC export, logarithmic frequency mapping, side-by-side preview, and a verification spectrogram coloured with Viridis…</div>

Inputs

Options are grouped so long tools stay easier to scan.

14 options

FilesUpload source files for this workflow.1

Image FilefileRequired

Single file max size: 25 MBSupported types: image/png, image/jpeg, image/webp, image/bmp

SettingsAdjust formats, ranges, numbers, and modes.12

Duration (seconds)numberOptionalSample RateselectOptionalOutput Audio FormatselectOptionalMinimum Frequency (Hz)numberOptionalMaximum Frequency (Hz)numberOptionalFrequency MappingselectOptionalTime SlicesnumberOptionalFrequency BinsnumberOptionalResize ModeselectOptionalContrast BoostnumberOptionalBlack ThresholdnumberOptionalVerification PaletteselectOptional

TogglesEnable or disable optional behavior.1

Top Row = High FrequencycheckboxOptionalEnabled when checked

Result

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Samples

Image to Spectrogram Audio

What this tool helps you do

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Result

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Embedding a High-Contrast Logo into a WAV Track

2. Logarithmic FLAC Sonification for Ambient Textures

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