sox-users Mailing List for SoX - Sound eXchange

On Nov 30 18:47:46, ha...@st... wrote:
> THis is 14.4.1 as provided by the package of OpenBSD-current.
> 
> The Czech radio streams classic in FLAC:
> $ mplayer http://amp1.cesnet.cz:8000/cro-d-dur.flac
> 
> This stream can be played without problems using mplayer,
> but not SoX. The OGG stream of the same broadcast plays fine:
> $ play http://amp1.cesnet.cz:8000/cro-d-dur.ogg  
> 
> Trying to playing the remote FLAC with SoX results in:
> 
> $ play http://amp1.cesnet.cz:8000/cro-d-dur.flac
> [long wait]
> ^C
> http fetch aborted.
> play FAIL formats: can't open input file URL
> `http://amp1.cesnet.cz:8000/cro-d-dur.flac': FLAC ERROR whilst decoding metadata

H, I forgot to add that thsi is ogg-encapsulated flac,
not a native flac. Could that be the reason?

On Sun, Nov 30, 2014 at 06:47:46PM +0100, Jan Stary wrote:
> THis is 14.4.1 as provided by the package of OpenBSD-current.
> 
> The Czech radio streams classic in FLAC:
> $ mplayer http://amp1.cesnet.cz:8000/cro-d-dur.flac
> 
> This stream can be played without problems using mplayer,
> but not SoX. The OGG stream of the same broadcast plays fine:
> $ play http://amp1.cesnet.cz:8000/cro-d-dur.ogg  
> 
> Trying to playing the remote FLAC with SoX results in:
> 
> $ play http://amp1.cesnet.cz:8000/cro-d-dur.flac
> [long wait]
> ^C
> http fetch aborted.
> play FAIL formats: can't open input file URL
> `http://amp1.cesnet.cz:8000/cro-d-dur.flac': FLAC ERROR whilst decoding metadata
> 
> Is this a bug, or is it simply not supported yet?
> Local FLAC files play fine of course.

Confirmed, and it seems to try reading a lot of data, as if a massive
amount is needed before playback start. Parameters tried to no avail:
--buffer 1024, --ignore-length, and a sequence like

wget -O - <url> | sox -t flac -

All same result, same SoX version, MacOS.


-- 
Doug Lee                 dg...@dl...                http://www.dlee.org
SSB BART Group           dou...@ss...   http://www.ssbbartgroup.com
The very smart may feel they have nothing to learn from anyone;
The very wise will find something to learn from everyone.  (7/14/01)

THis is 14.4.1 as provided by the package of OpenBSD-current.

The Czech radio streams classic in FLAC:
$ mplayer http://amp1.cesnet.cz:8000/cro-d-dur.flac

This stream can be played without problems using mplayer,
but not SoX. The OGG stream of the same broadcast plays fine:
$ play http://amp1.cesnet.cz:8000/cro-d-dur.ogg  

Trying to playing the remote FLAC with SoX results in:

$ play http://amp1.cesnet.cz:8000/cro-d-dur.flac
[long wait]
^C
http fetch aborted.
play FAIL formats: can't open input file URL
`http://amp1.cesnet.cz:8000/cro-d-dur.flac': FLAC ERROR whilst decoding metadata

Is this a bug, or is it simply not supported yet?
Local FLAC files play fine of course.

	Jan

Hi,
I am using libsox for the noise reduction. But after that I get the number
of samples increased after passing the noise reduction effect. I tried with
sox.exe, but no samples increased.

I read the noisered.c and get the following comment:

static int sox_noisered_drain(sox_effect_t * effp, sox_sample_t *obuf,
size_t *osamp)
{
    priv_t * data = (priv_t *)effp->priv;
    unsigned i;
    unsigned tracks = effp->in_signal.channels;
    for (i = 0; i < tracks; i ++)
        *osamp = process_window(effp, data, i, tracks, obuf, (unsigned)
data->bufdata);

    /* FIXME: This is very picky.  osamp needs to be big enough to get all
     * remaining data or it will be discarded.
     */
    return (SOX_EOF);
}

Could you help me how to do with this problem.

Hello everyone,

I  started  using  Sox for trimming silence on some of my music files,
almost  all of them were processes without any problems, but couple of
them failed with next error:
M:\>"D:\test\sox-14.4.1\sox.exe"The system cannot write to the specified device.
D:\test\sox-14.4.1\sox.exe FAIL formats: can't open input file `M:\21 - Misa no Tema Bi.flac':
No such file or directory
File's real name is 21 - Misa no Tēma Bī.flac, sox invocation string:
"D:\test\sox-14.4.1\sox.exe" "M:\21 - Misa no Tēma Bī.flac" "M:\21 - Misa no Tēma Bī (1).flac" trim 0 =2:29
So  the  question  is:  does  Sox support Unicode filenames and pathes
under  Windows? If yes, maybe I doing something wrong here? I executed
above  line  via  Run,  via  cmd  with codepage changed to 65001, from
PowerShell,  result  is  the  same.  Or  this  is  a bug and should be
reported to bug tracker?
Folders names also affected, I can't trim files from
Koukaku no Regios Original Soundtrack - Sound ∞ Restoration
directory.
The  strange  thing  is  that when I initially searched for files with
silence  at end, Sox successfully examined mentioned above file/folder
from PowerShell script...
Any advice would be appreciated :)

-- 
Best regards,
px                          mailto:px@i.kiev.ua

Le 2014-11-21 à 10:28, Christopher Kalafarski <ch...@fa...> a écrit :

> 
> The problem I’m having when I introduce the resampling is that the I’m not getting back as many frames as I should. For instance when converting from 48 to 44.1, I would expect to get back 3763 frames (I’m reading in 4096 frames), but I’m only actually getting ~2900. This is obviously making the resulting audio unusable.

Since you are using soxr, perhaps your problem is related to the last FAQ entry:
http://sourceforge.net/p/soxr/wiki/Home/

It seems to describe what you are experiencing.

-Pascal

I’m using SoX (actually libsoxr, but I haven’t gotten a response on that mailing list, so I’m hoping someone here can help) to resample some audio files. I’d like to keep the dependencies of the library I’m making as low as possible, which is why I’m using soxr over sox; doing so means I need to handle the file IO myself, and I’m not particularly familiar with these particular aspects of C. (Also at this point I’m just frustrated I can’t figure this out, so I’d like to solve the mystery)

Basically what I’m doing is taking the input file, detecting the format, handing it to soxr, and then writing the result to a new file. I’m using libsndfile to read and write, and if I short circuit the resampling step the output file is correct (i.e. I think the reading and writing is working fine).

The problem I’m having when I introduce the resampling is that the I’m not getting back as many frames as I should. For instance when converting from 48 to 44.1, I would expect to get back 3763 frames (I’m reading in 4096 frames), but I’m only actually getting ~2900. This is obviously making the resulting audio unusable.

As I said, I’m a little out of my depth here, but it seems like the problem is definitely with the resampling step, and I’ve triple checked how I’m setting up the processor and reread the examples and API, and I’m just not seeing anything obvious that could cause this.

My code for entire read-resample-write process is here:
https://gist.github.com/farski/4e5ae3f9915dcb77a138 <https://gist.github.com/farski/4e5ae3f9915dcb77a138>

If anyone could help me out I’d really appreciate it
Thanks

On Nov 08 07:29:06, at...@fa... wrote:
> if i understand the difference between 'lossy' and 'lossless', doesn't 
> it indicate in the manual that sox is non-destructive when it can be? ...
> 
> Audio file conversion with SoX is lossless when it can be, i.e.
> when not using lossy compression,
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> when not reducing the sampling rate or number 
> of channels, and when the number of bits used in the destination format 
> is not less than in the source format.

mp3 is a lossy compression

if i understand the difference between 'lossy' and 'lossless', doesn't 
it indicate in the manual that sox is non-destructive when it can be? ...

Audio file conversion with SoX is lossless when it can be, i.e. when not 
using lossy compression, when not reducing the sampling rate or number 
of channels, and when the number of bits used in the destination format 
is not less than in the source format.

----- Original Message -----
Subject: Re: [SoX-users] windows batch scripting and gen. sox questions
Date: Fri, 7 Nov 2014 20:04:05 -0600
From: fmiser <fm...@gm...>

> atomman wrote:
>
> hi - i'm new to SoX and have very little knowledge of windows
> batch scripting, so i'm looking for help with both
>
> the goal is to batch process a directory of misc. mp3 music files
> and just make some general improvements so they sound as good as
> reasonably possible without re-encoding them

If you use SoX, they _will_ be re-encoded.  Internally SoX converts
all formats to "raw", processes them, the converts to the output
format.

Regarding batch files - I'm pretty useless. *smiles*

--    fm


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Sox-users mailing list
Sox...@li...
https://lists.sourceforge.net/lists/listinfo/sox-users

On 2014-11-07 22:29, atomman wrote:
> hi - i'm new to SoX and have very little knowledge of windows batch 
> scripting, so i'm looking for help with both

If you are looking for a good reference/guide on using Windows' command
prompt, I would suggest the various pages under http://ss64.com/nt/
particularly the syntax link at the top.

> atomman wrote:
> 
> hi - i'm new to SoX and have very little knowledge of windows
> batch scripting, so i'm looking for help with both
> 
> the goal is to batch process a directory of misc. mp3 music files
> and just make some general improvements so they sound as good as
> reasonably possible without re-encoding them

If you use SoX, they _will_ be re-encoded.  Internally SoX converts
all formats to "raw", processes them, the converts to the output
format.

Regarding batch files - I'm pretty useless. *smiles*

--    fm

hi - i'm new to SoX and have very little knowledge of windows batch 
scripting, so i'm looking for help with both

the goal is to batch process a directory of misc. mp3 music files and 
just make some general improvements so they sound as good as reasonably 
possible without re-encoding them

what i would like to do for all files is:

* trim existing beginning and ending silence (start and end ONLY, 
duration unknown)
* pad ~1 sec. silence to beginning and end
* prevent clipping and add ~3db of headroom for further processing
* normalize the volume so all the files sound generally the same to the 
human ear
* any other suggestions ???

sox resides in a different directory than where i want to place the 
batch scripts, so i need some help in calling it and then processing the 
files - i would be fine with overwriting the existing files so i don't 
have to create the "output" directory

so sox is in "c:\program files (x86)\SoX\" and my mp3's are in 
"e:\music\working\", along with the batch script

the sox\ directory was added to my path variable

the example batch script doesn't seem to do me much good in this 
instance, but maybe it can offer a starting point...

cd %~dp0
mkdir output
FOR %%A IN (%*) DO sox %%A "output/%%~nxA" silence loudness gain -n -3 
pad 1 1
pause

however is looks like "silence" is not going to work for me since i want 
to trim all silence at only the beginning and end without having to 
specify a duration (i can use mp3DirectCut instead, as it can batch 
"crop" begin/end silence of unknown duration), but it looks like sox 
will work for everything else - i'm just not sure how to use it or which 
functions i really need

On Fri, Nov 7, 2014 at 12:45 AM, RT <rat...@gm...> wrote:
> I was wondering is it possible to run sox via html
>
> Example:
> 1) Have a user go to a website which launches sox
> 2) Have a user select an audio file on their hard drive
> 3) Have them select how long to loop an audio file for and how long the fade
> at the beginning of the audio file is and how long the fade at the end of
> the file is
> 4) Created audio file is saved on users hard drive.
>
> Is this possible?  Can html do this with sox?

This is more of a programming question than a sox one, so I hope I'm
not treading on people's toes by jumping in and answering!

You could do that, but the audio file would have to be uploaded to
your server, and then you'd run sox on the server and give the user a
file to download. The work will all happen on your server, so you'd
need either a really beefy server, or a queue of jobs that would make
this a horribly slow way of doing anything.

In utterly moronic theory, it would be possible to write a C
interpreter in JavaScript, and then you could actually run sox inside
a web browser. I say "moronic" because this would be as slow as
crossing the Kooyong tram tracks... nobody would actually want to run
this. For all practical purposes, no it's not possible for a web
browser to run sox, so it'd have to be sent off to your server.

ChrisA

Greetings
I was wondering is it possible to run sox via html

Example:
1) Have a user go to a website which launches sox
2) Have a user select an audio file on their hard drive
3) Have them select how long to loop an audio file for and how long the
fade at the beginning of the audio file is and how long the fade at the end
of the file is
4) Created audio file is saved on users hard drive.

Is this possible?  Can html do this with sox?

On 11/04/2014 11:42 PM, Jan Stary wrote:
> On Nov 04 16:21:46, mj...@gm... wrote:
>> Hello,
>>
>> Does the SoX project have any sample/test data available of audio files in
>> all of the various supported audio formats?
> 
> SoX comes with ./src/monkey.wav.
> (Srsly though, record 10s of yourself.)
> Use SoX to convert it to all formats you want to try.
> 
>> I'm interested in being able
>> to try different audio effects on the various formats that SoX supports
>> using a known good set of sample audio files.
> 
> Effects do not act on formats, effects act on audio data.
> SoX converts all audio data into an internal format
> before applying any effects. So all affects always act
> on audio data in this one format, the SoX internal format.
> 
> Only after all the effects have been applied
> does SoX convert the data again into the desired output format
> (such as flac or whatever).

I think for source code development and for end-user usage (development
on command-line level) it is important to have a data set. This is
especially important for test-driven development.

Could a package sox-data be created with from the same ultimate source
converted files for all combinations of:
- format (WAV/PCM, FLAC, AU/PCM, MP2, MP3, OGG, WMA/MP3, 3GP, etc.)
- sample size (8 bit, 16 bit, 24 bit)
- sample rate (8 kHz, 16 kHz, 32 kHz, 44.1 kHz, 48 kHz)
- channels (1 channel mono, 2 channel stereo, 4.1 multi channel, 5.1
multi channel, etc.)
- applicable data encoding options (µ-law, A-law, etc.)
- applicable data compression options (VBR, etc.)

These settings should be part of the file name and, if possible, of the
meta data such as ID3.

Additionally these files could be constructed with competing FOSS audio
applications such as Audacity in order to find where which applications
can improve its quality.

Perhaps better is to create a general overview of all possibilities
together with other audio communities and have each ship their set of
test files in e.g. sox-data, audacity-data etc.

A place to start is https://en.wikipedia.org/wiki/Audio_file_format and
man sox

I am willing to help out testing any solution and reviewing a general
overview.

Regards,

Pander

> 
> 	Jan
> 
> 
> ------------------------------------------------------------------------------
> _______________________________________________
> Sox-users mailing list
> Sox...@li...
> https://lists.sourceforge.net/lists/listinfo/sox-users
> 

On Wed, Nov 5, 2014 at 9:42 AM, Jan Stary <ha...@st...> wrote:
>> Does the SoX project have any sample/test data available of audio files in
>> all of the various supported audio formats?
>
> SoX comes with ./src/monkey.wav.
> (Srsly though, record 10s of yourself.)

I like to use whatever audio files are sitting around on my hard disk.
"Let It Go" has been my test piece for a few experiments, because I
never get tired of listening to it. Likewise the theme from "Alice:
Madness Returns". :)

ChrisA

I am using SoX's noise reduction via noise profile. However, I find the quality to be not on par with Audacity. There seems to be more of an echo effect when SoX is used, but Audacity doesn't show the effect. I see an old thread on this




https://sourceforge.net/p/sox/mailman/message/30021850/





Would greatly appreciate if anyone knows of other tools or if any improvements are being planned.

On Nov 04 16:21:46, mj...@gm... wrote:
> Hello,
> 
> Does the SoX project have any sample/test data available of audio files in
> all of the various supported audio formats?

SoX comes with ./src/monkey.wav.
(Srsly though, record 10s of yourself.)
Use SoX to convert it to all formats you want to try.

> I'm interested in being able
> to try different audio effects on the various formats that SoX supports
> using a known good set of sample audio files.

Effects do not act on formats, effects act on audio data.
SoX converts all audio data into an internal format
before applying any effects. So all affects always act
on audio data in this one format, the SoX internal format.

Only after all the effects have been applied
does SoX convert the data again into the desired output format
(such as flac or whatever).

	Jan

Hello,

Does the SoX project have any sample/test data available of audio files in
all of the various supported audio formats?  I'm interested in being able
to try different audio effects on the various formats that SoX supports
using a known good set of sample audio files.

Thanks,
Mitch

Hi again,

OK I did some testing on my end with a "MOTU UltraLike MK3" (firewire) [1] and a Native Instruments "Audio 4 DJ" (usb) [2] on MBPro late 2011, Mac OS10.9.5, using sox14.4.1 executable for playback of stereo and 4-ch files. FYI, there was already a thread about using sox with external audio devices in 2011, but to this date I haven't been able to solve it: http://sourceforge.net/p/sox/mailman/sox-users/thread/CAGzDe_ZhK3Fhzeqhxu8he7EZfD8y1Y1aC1LmGPerq7j6Cmptwg%40mail.gmail.com/#msg28204172

The command I am using is this: sox <myfile.aif> -d   (myfile.aif is a 2.3sec long stereo 44.1k/16Bit .aiff file)

1) As expected it works fine with the built-in audio device. 
2) When selecting the MOTU Ultralite MK3 as the system audio device in the system preferences, the file plays back faster and distorted with clicks. Using the -V6 option in the command one can see that sox complains about not being able to use 44.1kHz: "./sox DBUG coreaudio: audio device did not accept 44100 sample rate. Use 96000 instead." When using other applications, however (e.g. MaxMSP or Csound), I can set the samplerate of the device. 
3) When setting the default audio device in the system preferences to the "Native Instruments Audio 4 DJ", the file plays back faster and distorted, too. However, sox does not seem to complain about anything.
It also did not make a difference where I used the external audio device as system device or whether I specified via "-t coreaudio <devicename>"

I then created a 4-ch file from the stereo file using the 'merge' input combiner like this: 

"./sox -M  -v1.0 anton.aif  -v1.0 anton.aif  anton-4ch.aif"

I would be incredibly thankful if there'd be a way to make this work.  As mentioned before I could get proper audio output from the external device when using "soundflower" [3] ("virtual audio cable" means that it is a driver not for a physical device but for sending audio between applications) as system device and then using "soundflowerbed" [4] to tap into the audio and send it to the external audio device. However, this does not work for multichannel audio (starts distorting and clicking when there's more than say 8 channels). 

Is there a maybe a workaround or a way to use a different driver than coreaudio (e.g. portaudio)? If yes, how can this be specified?

So far I've tried it with these audio interfaces (which work in other audio applications on the same OS), none of them worked for me through sox:

MOTU 828MK2
RME Fireface 800
RME Fireface 400
RME UCX
MOTU Ultralite MK3
Native Instruments Audio 4 DJ

SoX is such a convenient and versatile tool and I think one of the most powerful features are it's multichannel capabilities. 
So much more would be possible if there wouldn't be this limitation not being able to use other devices than the built-in on MacOSX.

I've attached a logfile of my sox commands (+ sox's output with the -V6 option). I can provide the sound files if necessary.

Thanks for any help,
Marlon

[1] http://www.motu.com/products/motuaudio/ultralite-mk3
[2] http://www.native-instruments.com/en/products/dj/traktor-scratch-duo/feature-overview/hardware/audio-4-dj/
[3] http://rogueamoeba.com/freebies/soundflower/