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Extract ISO to DSF PCM. Clicks Issues. Part 4

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Final of the article about click matter into DSF and PCM (FLAC, WAV, AIFF, etc.) files after ISO (1-bit audio) extraction. Clicks inside audio stuff.

Extract ISO to DSF PCM. Click Issues. Part 4

 

 

Most problematic clicks for removing is clicks into audio stuff. So far by time from track border that SmoothDC can't smooth it. At the picture such click in beging of Track 1.

ISO to DSF and PCM. Clicks into audio stuff

SmoothDC period about several milleseconds. For this time gain changed from 0 to maximal value. Special form of fading gain allow minimize bursts between tracks.

SmoothDC supress click near border

 

If click distance by time axis from begin/end of the audio file, SmoothDC can't suppress it.

ISO click SmoothDC can't suppress

For supressing this click need use audio editor and correct for of the signal manually.

There are no audio editor I know that can edit DSD audio signal in 1 bit format directly.

Signal converted in multibit format, edited and converted back.

You may to use this suggested way:

1. Convert DFF DSF to WAV with sample rate 352 or 768 kHz/ 32 or 64-bit float.

2. Edit it in usual PCM audio editor capable for high sample rates and bit depths.

For finding the click need larger scale of oscillogramm. Such clicks may have -70 dB level and may be difficult to detect.

Sometimes recommended use time-frequency diagramm (sonogramm). There click may be shown as brighter line across all frequencies.

Bit depth and sample rate of saved file should be same input one.

3. Convert the edited WAV to DSF.

Losses for the transformations for each of steps 1 and 3 comparable with resampling. I.e. it is not bottleneck of a audio system. If you use software with low distortions, of course.

 

 

Conclusion

Clicks, that appear in the files extracted from ISO, have very different reasons.

 

First need research used audio player for gapless playback capabilty and turn it on.

For a finding of click cause need learn extracted DSF and PCM files at borders. Sometomes in big scale.

Any known me type of clicks may be fixed.

 

Yuri Korzunov,
Audiophile Inventory developer

 

Read more:

  1. How to Convert ISO to DSF under Mac and Windows >
  2. How to Convert ISO to FLAC under Mac and Windows >
  3. How to Improve Sound Quality >

 

 

 

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