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In Reply to: RE: DSD [A Reprise]... posted by Storris on September 17, 2014 at 09:44:01
> Can I publicise this on another forum?
Yes - with link to original article (or with author name), please.> Do you know the Directstream DAC?
Models? As examples "Zodiac Platinum DSD DAC", "Ayre Acoustics QB-9 DSD DAC", etc. Exists "native DSD" DAC and "DoP DSD" DAC. DoP is "DSD other PCM" mode transfer of DSD audio data via USB.
> Is your conversion similar to what is being done there?
DSD is delta sigma modulated audio stream 1 bit/DSD64(2.8 MHz)/DSD128(5.6 MHz). As manufacturer I can't use terms "DSD" or "Direct Stream Digital" due it's registered trademarks by SONY.
Software developer of HD audio file converter
Edits: 09/17/14 09/17/14Follow Ups:
The Directstream DAC is linked below. The design up-samples all digital inputs (DSD & PCM) to 1Bit/28Mhz and outputs as 1Bit/5.6Mhz, using FPGA.
I appreciate your tool is not the same, but would the conversion to .dsf be a similar process?
DirectStream DAC use sigma delta modulation for converting input PCM data to 1-bit.If we simply upsample multibit PCM and truncate bit-depth to 1, we get high quantisation noise level (depend on sampling rate).
Sigma delta modulation allow shift most energy of the noise to inaudible frequency range.
DirectStream DAC audio data format = DSD = DSF audio data format = sigma delta modulation with sample rates 44100 Hz x N
Software developer of HD audio file converter
Edits: 09/17/14 09/17/14
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