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.
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Quick start
Call this tool from your code in three languages.
cURL
# 1) Request a presigned URL → returns { uploadUrl, storageKey }
curl -X POST 'https://api.elysiatools.com/api/upload/presign/image-to-spectrogram-audio' \
-H 'Content-Type: application/json' \
-d '{"filename":"imageFile.ext","contentType":"application/octet-stream","size":12345}'
# 2) PUT the file bytes directly to the presigned uploadUrl
curl -X PUT '<presigned uploadUrl>' \
--data-binary @/path/to/file.ext
# 3) Call the tool, passing the returned storageKey for each file field
curl -X POST 'https://api.elysiatools.com/en/api/tools/image-to-spectrogram-audio' \
-F 'imageFile=uploads/2026/01/01/your-tool-1700000000000-abc123.ext' \
-F 'durationSeconds=8' \
-F 'sampleRate=44100' \
-F 'outputFormat=wav' \
-F 'minFrequencyHz=200' \
-F 'maxFrequencyHz=12000' \
-F 'frequencyScale=linear' \
-F 'topRowHighFrequency=true' \
-F 'timeSlices=640' \
-F 'frequencyBins=160' \
-F 'resizeMode=stretch' \
-F 'contrast=1.25' \
-F 'threshold=0.05' \
-F 'verificationPalette=magma'