Korg AudioGate SRC

[Bruce B]

AudioGate is a software sample rate converter as well as player. Normally shipped with the Korg MR-1/2, 1000 and 2000 hardware recorders. Twitter account holders can also use this software as well. Conversions can be made from DSD64fs and DSD128fs files as well as PCM files all the way up to 24/192kHz. The cool thing is the multitude of user options with multiple filter shapes, dither, noise shaping and audio formats. Here is the main user interface.

[Bruce B]

To add files, click the "Add" button and a browser window pops up so you can choose the files that need to be played/converted.
Here I have added 2 DSD files. Sonoma makes non-interleaved (dual mono) files for stereo. You will need to highlight both files and choose "Channel Link"

To check that the file was linked, highlight the file, "right click" and choose "File Info".

[Bruce B]

Now if you want to do a sample rate conversion, click "Export" in which a menu box will appear from which you can choose a few options.

1. Source = All Songs or Selected Songs

2. Destination = Where do you want the converted tracks to go?

3. File Format = What is the Format you want the converted files to be in? Choices are .wav, bwf, aiff, diff, dsf, wsd, mp3, wma, wma Professional, wma Lossless and FLAC

4. File Type = What type of file do you want? Stereo interleaved (stereo track in 1 file), Mono/Dual Mono (non-interleaved), MR Project (I'll get into this later)

5. Sample Rate = Self Explanitory

6. Bit Depth = Ditto

7. Option = I'll get into this later as well

[Bruce B]

Here I have made my Export selections.

1. .wav file
2. interleaved file
3. 176.4kHz
4. 24-bit
5. Now when going from DSD->PCM, you have several other "Options", such as, how steep do you want your filter. Filter options are "None", Sharp Roll-off (-3dB @ 42kHz), Soft Roll-off (-3dB @ 50kHz). Most of the time I either use "None" or "Soft".
6. Do you want to "Normalize" your files. I never do.
7. Dither options are "None", "TPDF" and "Korg Aqua". When going from DSD->PCM, I don't use Dither. When working strictly in the PCM domain, I do.

[Bruce B]

one more

[Bruce B]

reserved again

[JackD201]

Hi Bruce,

I know the question I'm about to ask might smack of newbie-ness but what exactly is "fs". I keep on thinking frames per second but for the life of me I can't decipher what it is in an audio context. I hope you can indulge me with this clarification. It's a spec I am wholly unfamiliar with.

TIA

Jack

[Bruce B]

full scale 44.1kHz x 64 = 2.8224MHz or the SACD sample rate

[microstrip]

Bruce,
Do you know of any place where we can download some good quality DSD sample files to evaluate conversions?

[mojave]

Blue Coast Records has free downloads for using with AudioGate.