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1
FLAC / Re: SACD to FLAC
Last post by Wombat -
I had to include the "-D" parameter to stop SoX from dithering; I'm not sure why it was automatically doing this. Maybe it's better? I'm not too sure.
SoX does dither when going to 16bit because it is common practise and not because it is bad. If you ask mathematical skilled people they even recommend 24bit to be dithered when coming from the 32bit integer SoX routines.
4
FLAC / Re: SACD to FLAC
Last post by blurry_light -
What version are you running?
https://sourceforge.net/projects/sox/files/sox/14.4.2/sox-14.4.2-win32.zip

okay so from reading another thread:
https://www.computeraudiophile.com/forums/topic/38313-converting-dsd-to-pcm/

Do I have to install the DSD patches? I'm running windows and trying to figure out what files from the following site to download and where to install/place them:
A while back Mans Rullgard added support to SoX for DSD resampling. It applies the SoX resampling to 1bit DSD directly. https://github.com/mansr/sox



A cursory glance at that computeraudiophile thread shows that someone found this link from which the file sox-dsd-win32-MSVC.zip can be downloaded. I downloaded a DSD64 (which I believe is the kind of encoding SACD's use; correct me if I am mistaken) file from here and managed to convert it to FLAC with the included SoX.exe executable included in the ZIP file (extract all of the compressed file first).

I used the following batch file in Windows 10 with the executable in question:

Code: [Select]
for %%a in ("YourInputFolderHere\*.dsf") do sox -V3 -S -D "%%a" -b 16 "YourOutputFolderHere\%%~na.flac" rate -v 44100
pause

I had to include the "-D" parameter to stop SoX from dithering; I'm not sure why it was automatically doing this. Maybe it's better? I'm not too sure.

Anyway, this is if you want to encode it in standard CDDA quality (16-bit stereo, 44.1kHz). You can change the bit depth and sampling frequency to whatever you want the FLAC output to be.
6
Scientific Discussion / Re: Objective evaluation of SBC and aptX codecs using music-based audio metric
Last post by Big_Berny -
Well the main problem of your test setting is that it's not "objective" as you think. A bigger difference in wave forms doesn't necesserily mean that the difference to the original sound file is more audible. So aptX and SBC(loudness) may look similar in your analysis but one might outperform the other in listening tests.

So a listening test as mentioned here would lead to much more valid results: https://wiki.hydrogenaud.io/index.php?title=ABC/HR
7
Support - (fb2k) / Re: Filters don't work
Last post by andreyiv -
When I load list of mp3 files and randomly playback them — why I can`t filter this list by playing track?
So I could see current playing track on top of the list.
8
FLAC / Re: SACD to FLAC
Last post by bmcelvan -
What version are you running?
https://sourceforge.net/projects/sox/files/sox/14.4.2/sox-14.4.2-win32.zip

okay so from reading another thread:
https://www.computeraudiophile.com/forums/topic/38313-converting-dsd-to-pcm/

Do I have to install the DSD patches? I'm running windows and trying to figure out what files from the following site to download and where to install/place them:
A while back Mans Rullgard added support to SoX for DSD resampling. It applies the SoX resampling to 1bit DSD directly. https://github.com/mansr/sox

9
Scientific Discussion / Objective evaluation of SBC and aptX codecs using music-based audio metric
Last post by Serge Smirnoff -
I made objective measurements of the codecs using music-based df-metric. The main purpose of the post - to present the method. Your feedback is valuable as always. Thanks in advance.

The article is here - http://soundexpert.org/news/-/blogs/audio-quality-of-bluetooth-aptx#aptxmeasurements

Concerning the results, aptX is no better than SBC, pure marketing.
10
Audio Hardware / Re: Audio-Technica ATW-R03 VHF radio mic receiver fault
Last post by polemon -
If it got out of tune, it probably is because the caps dried up. So I'd replace bulging caps first, etc.
Without having a name of the product, it's difficult to give any tips where to start.

Are there any markings next to the pots? Also, are you sure the frequency isn't user-selectable?

What kind of test equipment do you have (multimeter, frequency counter, oscilloscope)?
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