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Miska

Squarewaves from DACs

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Based on request here, I made some more square wave scope measurements using a high resolution scope for comparison with earlier measurements of DSC1.




Here are 7 kHz square wave results for the DSC1.

DSD128:
blogs/miska/attachments/16294-squarewaves-dacs-square7k-dsd128.png

DSD256:
blogs/miska/attachments/16295-squarewaves-dacs-square7k-dsd256.png

DSD512:
blogs/miska/attachments/16296-squarewaves-dacs-square7k-dsd512.png




Here are 7 kHz square wave results for the iFi iDSD Micro.

PCM 352.8k:
blogs/miska/attachments/16298-squarewaves-dacs-idsdmicro-square7k-3528.png

PCM 705.6k:
blogs/miska/attachments/16299-squarewaves-dacs-idsdmicro-square7k-7056.png

DSD256:
blogs/miska/attachments/16300-squarewaves-dacs-idsdmicro-square7k-dsd256.png

DSD512:
blogs/miska/attachments/16301-squarewaves-dacs-idsdmicro-square7k-dsd512.png




And for comparison Marantz HD-DAC1.

PCM 192k:
blogs/miska/attachments/16302-squarewaves-dacs-marantz-square7k-pcm192.png

DSD128:
blogs/miska/attachments/16303-squarewaves-dacs-marantz-square7k-dsd128.png




There is also notable difference between waveform stability and consistency between different formats and rate. At lowest PCM rates there is much more shape variation from cycle to another and the highest DSD rates have very consistent waveform shape. This is most visible in the intensity coded DPO mode plots I posted earlier.
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Comments

  1. kurb1980's Avatar
    Miska and details on the modulator settings for the iDSD Micro? My settings for iDSD micro I have the filter set to standard on the unit. I use 7th order modulation I find the 7th order sound best to my ear?