IPB

Welcome Guest ( Log In | Register )

Sox command line to downsample Pcm to Flac
andrewfg
post Nov 18 2012, 23:06
Post #1





Group: Members
Posts: 84
Joined: 12-May 08
Member No.: 53478



Can anyone please tell me the switches needed for downsampling hi-res Pcm (Std_In) to lo-res Flac (Std_Out)?

I am trying the following, but at 192000Hz neither the big nor little endian variety works.

CODE
sox.exe -q -t raw -s -b24 -c2 -r192000 -L - -t flac -C0 - rate 48000 => outputs distorted audio
sox.exe -q -t raw -s -b24 -c2 -r192000 -B - -t flac -C0 - rate 48000 => outputs white noise

Whereas (oddly enough) at 96000Hz the little endian works, but the big endian does not.

CODE
sox.exe -q -t raw -s -b24 -c2 -r96000 -L - -t flac -C0 - rate 48000 => works !!
sox.exe -q -t raw -s -b24 -c2 -r96000 -B - -t flac -C0 - rate 48000 => outputs white noise

Don't ask me why, but the fact that at 96000Hz an extra byte order flip makes a difference to the success rate, gives me a gut feeling that sox.exe is somehow hitting an internal timing issue or lack of CPU capacity (e.g. thread timing issue?).


--------------------
AndrewFG (Whitebear -- http://www.whitebear.ch/mediaserver )
Go to the top of the page
+Quote Post
 
Start new topic
Replies
JJZolx
post Nov 19 2012, 20:22
Post #2





Group: Members
Posts: 411
Joined: 26-November 04
Member No.: 18345



Are the results (white noise, distorted audio, works) the result of streaming the audio to some particular player or of playing converted files?
Go to the top of the page
+Quote Post
andrewfg
post Nov 19 2012, 23:06
Post #3





Group: Members
Posts: 84
Joined: 12-May 08
Member No.: 53478



QUOTE (JJZolx @ Nov 19 2012, 20:22) *
Are the results (white noise, distorted audio, works) the result of streaming the audio to some particular player or of playing converted files?


Either. Both. If the audio plays wrong when streamed directly, it also plays wrong when saved to a file and played later...


--------------------
AndrewFG (Whitebear -- http://www.whitebear.ch/mediaserver )
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 29th November 2014 - 07:21