Re: Automatic Gain Control

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Re: 14.3.1.rc2 on OpenBSD - sndio problems

On Dec 29 18:26:07, Chris Bagwell wrote:
> On Tue, Dec 29, 2009 at 7:52 AM, Jan Stary <hans <at> stare.cz> wrote:
> 
> > Trying to run 14.3.1rc2 on OpenBSD 4.6.
> > ./configure && make works OK when using
> >
> > env     \
> >        CPPFLAGS='-I/usr/local/include -I/usr/local/include/libpng' \
> >        LDFLAGS=-L/usr/local/lib PKG_CONFIG=`which pkg-config`  \
> >        ./configure --without-ffmpeg --datarootdir=/usr/local/
> >
> > The resulting sox behaves as follows: when OpenBSD's aucat(1)
> > audio server is _not_ running, play(1) works as usual. If aucat(1)
> > _is_ running, play just complains that /dev/audio is busy
> > (which is true, it's used by the running aucat) and exits.
> >
> > That makes me wonder how much is OpenBSD's sndio interface
> > supported in sox. Seeing "sndio: yes" in configure's output
> > makes me think that it is supported; OTOH, one of sndio's
> > great features is that an audio application doesn't need
> > to care whether it is talking to an audio(4) device or
> > an aucat(1) server.
> >
> > sox seems to care: it can play to /dev/audio (if it's not busy),
> > but can't play to aucat. Apparently, this cannot be boiled down
> > down to just calling
> >
> >        sio_open(NULL, mode, 0)
> >
> > in src/sndio.c, as opposed to the current
> >
> >        sio_open(device, mode, 0)
> >
> > (which seems to be relevant, but making this change in the source
> > doesn't change the 'busy' behaviour).
> >
> > I understand there is a sox package/port for OpenBSD
> > which does not have this problem. Anyway, the patches
> > http://www.openbsd.org/cgi-bin/cvsweb/ports/audio/sox/patches/
> > don't seem to deal with this.
> >
> > How hard would it be to make vanilla sox able to play to aucat(1)?
> > That way, I could both
> >
> >        (1) use the newest sox on my machine
> >        (2) continue using the aucat server
> >
> >                Thank you for your time
> >
> >                        Jan
> >
> >
> >
> I've no experience with OpenBSD but can make an educated guess based on like
> you provided.  I guess that OpenBSD must still support OSS and/or SunAU
> audio for backwards compatibility.  For no really good reason that I'm aware
> of, SoX puts sndio driver as a lower choice then oss or sunau.
> 
> You can test if this is true by adding --without-oss --without-sunaudio to
> your configure line.
>
> Or you can force to use sndio driver specifically to
> see if it works better:
> 
> sox infile -t sndio default

When ./configure'd without any device driver specifications,
sox chooses this on OpenBSD 4.6:

OPTIONAL DEVICE DRIVERS
ao (Xiph)..................yes
alsa (Linux)...............no
coreaudio (Mac OS X).......no
sndio (OpenBSD)............yes
oss........................no
pulseaudio.................no
sunaudio...................yes
waveaudio (MS-Windows).....no

The resulting binary can play myaudio files allright,
choosing sunau as the device driver (output edited):

$ play -V file.mp3
play: SoX v14.3.1

Input File     : 'file.mp3'
Output File    : '/dev/audio' (sunau)

So I guess I don't need oss compiled in. If I also disable
sunaudio (./configure --without-oss --without-ao --without-sunaudio),
I can still play my audio files (output edited):

$ play -V file.mp3
play: SoX v14.3.1

Input File     : 'file.mp3'
Output File    : 'default' (sndio)

"sox file.mp3 -t sndio default" works too.

> Please let me know how it goes and I can update source code to prefer sndio
> first when its found compiled in.

Great, thanks.

	Jan

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Re: 14.3.1.rc2 on OpenBSD - sndio problems

> > I've no experience with OpenBSD but can make an educated guess based on like
> > you provided.  I guess that OpenBSD must still support OSS and/or SunAU
> > audio for backwards compatibility.  For no really good reason that I'm aware
> > of, SoX puts sndio driver as a lower choice then oss or sunau.
> > 
> > You can test if this is true by adding --without-oss --without-sunaudio to
> > your configure line.
> >
> > Or you can force to use sndio driver specifically to
> > see if it works better:
> > 
> > sox infile -t sndio default
> 
> When ./configure'd without any device driver specifications,
> sox chooses this on OpenBSD 4.6:
> 
> 
> OPTIONAL DEVICE DRIVERS
> ao (Xiph)..................yes
> alsa (Linux)...............no
> coreaudio (Mac OS X).......no
> sndio (OpenBSD)............yes
> oss........................no
> pulseaudio.................no
> sunaudio...................yes
> waveaudio (MS-Windows).....no
> 
> 
> The resulting binary can play myaudio files allright,
> choosing sunau as the device driver (output edited):
> 
> $ play -V file.mp3
> play: SoX v14.3.1
> 
> Input File     : 'file.mp3'
> Output File    : '/dev/audio' (sunau)
> 
> So I guess I don't need oss compiled in. If I also disable
> sunaudio (./configure --without-oss --without-ao --without-sunaudio),
> I can still play my audio files (output edited):
> 
> $ play -V file.mp3
> play: SoX v14.3.1
> 
> Input File     : 'file.mp3'
> Output File    : 'default' (sndio)
> 
> "sox file.mp3 -t sndio default" works too.

Relevantly to my original post, when I only leave sndio
as an output device driver, sox makes no difference between talking
to an audio(4) device or a running aucat(1) audio server,
just as a sndio application is supposed to.

NB: I moved to RC3 before writing the above; with RC3,
the above happens on both OpenBSD 4.6 and OpenBSD-current.

	Thanks!

		Jan

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Re: 14.3.1.rc2 on OpenBSD - sndio problems

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Removing silence from a sound file

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Re: Re moving silence from a sound file

Hi Debasish, you can use this:

sox in.wav out.wav silence 1 1 0.1% reverse silence 1 1 0.1% reverse

Change in.wav to your input file name, out.wav to your desired output file
name and the 0.1%'s to whichever amplitude threshold you consider as
silence.

Mitch

Debasish Chandra wrote:
> 
> Hi,
> 
> I want to remove all the silences more than 1 sec from an audio file, but
> I couldn't find any appropriate SOX command for that. Can you please help
> me to form a command for that?
> 
> Best Regards,
> Debasish
> 
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Re: Re moving silence from a sound file

Hi, just my curiosity ...
Why do u use reverse?

Z

On 4.1.2010 14:45, msaun76 wrote:
> Hi Debasish, you can use this:
>
> sox in.wav out.wav silence 1 1 0.1% reverse silence 1 1 0.1% reverse
>
> Change in.wav to your input file name, out.wav to your desired output file
> name and the 0.1%'s to whichever amplitude threshold you consider as
> silence.
>
> Mitch
>
>
> Debasish Chandra wrote:
>    
>> Hi,
>>
>> I want to remove all the silences more than 1 sec from an audio file, but
>> I couldn't find any appropriate SOX command for that. Can you please help
>> me to form a command for that?
>>
>> Best Regards,
>> Debasish
>>
>> ------------------------------------------------------------------------------
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>> Take advantage of Verizon's best-in-class app development support
>> A streamlined, 14 day to market process makes app distribution fast and
>> easy
>> Join now and get one step closer to millions of Verizon customers
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>>
>>
>>      
>    

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Re: Re moving silence from a sound file

Korek is right, the following does the same thing:

sox in.wav out.wav silence 1 1 0.1%

I took this from old code that hadn't been cleaned up correctly.

korek wrote:
> 
> Hi, just my curiosity ...
> Why do u use reverse?
> 
> Z
> 
> On 4.1.2010 14:45, msaun76 wrote:
>> Hi Debasish, you can use this:
>>
>> sox in.wav out.wav silence 1 1 0.1% reverse silence 1 1 0.1% reverse
>>
>> Change in.wav to your input file name, out.wav to your desired output
>> file
>> name and the 0.1%'s to whichever amplitude threshold you consider as
>> silence.
>>
>> Mitch
>>
>>
>> Debasish Chandra wrote:
>>    
>>> Hi,
>>>
>>> I want to remove all the silences more than 1 sec from an audio file,
>>> but
>>> I couldn't find any appropriate SOX command for that. Can you please
>>> help
>>> me to form a command for that?
>>>
>>> Best Regards,
>>> Debasish
>>>
>>> ------------------------------------------------------------------------------
>>> This SF.Net email is sponsored by the Verizon Developer Community
>>> Take advantage of Verizon's best-in-class app development support
>>> A streamlined, 14 day to market process makes app distribution fast and
>>> easy
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>>> _______________________________________________
>>> Sox-users mailing list
>>> Sox-users <at> lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/sox-users
>>>
>>>
>>>      
>>    
> 
> 
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> 

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Re: libsox compand

Since my first post was New Year's eve, most of the people who would have
answered were understandably busy with far more important things!

So I'm throwing a last call for help on this issue, if anyone knows how I
could pass arguments to compand through libsox, it would be greatly
appreciated.

Cheers,
Mitch

msaun76 wrote:
> 
> I'm using libsox in software I'm writing but I'm having trouble with the
> compand effect parameters.
> 
> I believe the comma in the parameters is confusing the parser.  Here's an
> excerpt from an example file in the sox source:
> 
> /* Create the `vol' effect, and initialise it with the desired parameters:
> */
> e = sox_create_effect(sox_find_effect("vol"));
> args[0] = "3dB", assert(sox_effect_options(e, 1, args) == SOX_SUCCESS);
> /* Add the effect to the end of the effects processing chain: */
> assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
> 
> I want to process the buffer like this: compand 0,.1 -12,0 -0.1 0 0
> What is wrong with this argument line?
> args[0] = "0,.1", args[1] = "-12,0", args[2] = "-0.1", args[3] = "0",
> args[4] = "0", assert(sox_effect_options(e, 5, args) == SOX_SUCCESS);
> 
> I tried isolating the comma separated values into their own arguments but
> to no avail.
> 
> Thanks!
> 

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Re: libsox compand

On Jan 04 10:59:27, msaun76 wrote:
> So I'm throwing a last call for help on this issue, if anyone knows how I
> could pass arguments to compand through libsox, it would be greatly
> appreciated.

The manpage of libsox knows. Have you read it?
Or did you miss the sox_effect_options() function?

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