Sonezaki Converter

Free software to upsample CD audio sources to high-resolution quality

Latest News

March 25, 2026: Added the "Real Gachi" edition (virtually identical to 48kHz 24bit high-res audio sources).

August 26, 2026: Released the new Professional edition revision.

Download

Get the Professional edition (requires 64GB of installed memory) here.

Upsampling Specifications

44.1kHz 16bit →

192kHz 24bit
384kHz 32bit
768kHz 32bit

Filter Types

Filter "Ohatsu" (Estimated generation time: 50 hours)
Filter "Tokubei" (Estimated generation time: 400 hours)
Filter "Real Gachi" (Estimated generation time: 100 hours)

Audio Samples

Original Source
(44.1kHz 16bit)

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Ohatsu

192kHz 24bit

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384kHz 32bit

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768kHz 32bit

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Tokubei

192kHz 24bit

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384kHz 32bit

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768kHz 32bit

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Real Gachi

192kHz 24bit

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Introduction Blog

Read developer updates, production episodes, and more.

Copyright & Disclaimer

The copyright of this software belongs to the developer KeKe (contact@sonezaki-converter.osaka.jp).

The developer assumes no responsibility for any accidents or damages resulting from the use of this software.