|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
213.137.8.6
In Reply to: RE: DSD [A Reprise]... posted by Yuri Korzunov on September 17, 2014 at 08:23:23
Well Yuri, thank you.I have downloaded and used your converter. Can I publicise this on another forum?
I think it is a part of the answer to the questions I have.
Do you know the Directstream DAC? Is your conversion similar to what is being done there?
Edits: 09/17/14 09/17/14Follow Ups:
Howdy
The block diagram is a similar formulation of a sigma delta as I like to use when explaining DSD. In so far as both have sigma delta modulators our approaches are similar - but virtually anything that produces a single bit bit stream will have a sigma delta modulator. I've chosen to upsample all PCM inputs to 128 x 44.1k (via 640 x 44.1k) rather than having two output rates (since the hardware can only be optimized for one.)
Also with audio sigma delta modulators the devil is in the details.
-Ted
> Also with audio sigma delta modulators the devil is in the details.Fully exactly! :)
Software developer of HD audio file converter
Edits: 09/17/14 09/17/14
Hi Yuri,
I am getting a lot of clipping when converting .dsf/.dff to FLAC. Are there any settings that will help?
Hi Storris,Cliping with AuI?
1. You use DSF or DFF?
2. What sample rate of input DSF and DFF?
3. What sample rate of output FLAC?
4. Can you send me source file to dropbox or other?
Best regards,
Yuri
Software developer of HD audio file converter
Edits: 09/20/14
If you don't have a gain control, you need one for converting to PCM formats other than floating point. There is just too much variance in levels with DSD recordings. Existing converters such as Korg Audiogate and Weiss Saracon have this feature.
As a workaround, convert DSD to floating point and then use other software to reduce gain and convert to integer formats.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Tony,
I have tried using Saracon and Audiogate to convert files but neither seems to work without their proprietary hardware. I have also tried HQPlayer from Signalyst but cannot find the "Convert to..." button. Am I missing something?
I have used Audiogate to convert to/from DSD. The version that I have requires a Twitter account and "tweets" every time the converter is used in lieu of Korg hardware. The newest version may no longer allow this mode, I don't know.
HQPlayer converts from file formats to the audio device, not to file. There may be a way to capture the ASIO output with some kind of asio pseudo-device, but I haven't tried this. (Note: HQPLayer also has a gain control.)
I haven't tried Saracon. It's expensive and some people don't like its sound quality.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Thx Tony, I've found a usable version of Audiogate.
Edits: 09/20/14
Hi Tony,I don't use now direct access to DFF (due license to DFF issue). It converted via free decoder to intermediate WAV, after resampled/changed bit-depth, after converted to target format.
To DSF AuI has direct access. DSF opened as 64-bit floating point (double precision) and all processings AuI do in 64-bit floating point.
Thank you for suggestion about volume control, I will think how apply it.
Best regards,
Yuri
Software developer of HD audio file converter
Edits: 09/20/14
Special thanks, Tony Lauck and Storris for info and suggestions.
Now released new AuI ConverteR 48x44 v. 3.8.7 with volume control -40 ... +40 dB and 0.1 dB step (enabled for versions PROduce-R and PROduce-RD).
I while check converting file by Storris to intermediate wav (yesterday finished adding of volume control and fixed bug with BWF WAV files [was detected in free version], generated by Pro Tools). It has max peak levels. I will check way intermediate wav via AuI.
Best regards,
Yuri
Software developer of HD audio file converter
Yuri, thanks for the response. Yes clipping is with Aul,
1. .dff
2. 2.8Mhz
3. All sample rates/bit depth at FLAC and .wav I haven't tested other formats.
4. http://1drv.ms/1raVJIt - is a Skydrive link.
Regards
SM
Thank you. I will check it.
Software developer of HD audio file converter
> 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 09/17/14
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
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: