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What is Direct SBM and what has it got to do with SA-CD?

April 26, 2017GOT SA-CD SBM

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What is Direct SBM and what has it got to do with SA-CD?

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SBM is short for Super Bit Mapping – one of various methods for down-converting an audio signal from a higher resolution to a PCM signal with the desired resolution. It involves techniques known as dithering and noise shaping. Direct SBM is the method for converting a DSD signal to 16-bit 44.1 kHz PCM in one step in order to minimize noise because every decimation step potentially adds quantization noise. On hybrid SA-CDs with the Direct SBM label, the audio on the CD-compatible layer is derived from the DSD master using this process.

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Posted

SBM is short for Super Bit Mapping – one of various methods for down-converting an audio signal from a higher resolution to a PCM signal with the desired resolution. It involves techniques known as dithering and noise shaping. Direct SBM is the method for converting a DSD signal to 16-bit 44.1 kHz PCM in one step in order to minimize noise because every decimation step potentially adds quantization noise. On hybrid SA-CDs with the Direct SBM label, the audio on the CD-compatible layer is derived from the DSD master using this process.