Added pick effect back into 12.17.4 - Is there a reason why it was removed?

keep listening on a pipe after EOF

Is there any way to get sox (or a general solution for any program, really ) to keep listening on a named pipe
despite getting an EOF on the pipe?

at the moment I'm doing

while(test 1 ) ; do sox <input options> ... <pipe name> ...<output stuff> ; done;

Among other things I want to avoid some annoying clicks as the output is closed and opened.

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Re: keep listening on a pipe after EOF

> Is there any way to get sox (or a general solution for any program, really
> ) to keep listening on a named pipe despite getting an EOF on the pipe?
Can you just cat all the content together before piping?  Example (for mp3
audio): `mpg123 -s a.mp3 b.mp3 > myfifo`  (or for raw audio): `cat a.raw
b.raw > myfifo`

Levi

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Re: keep listening on a pipe after EOF

>Is there any way to get sox (or a general solution for any program, really )
>to keep listening on a named pipe despite getting an EOF on the pipe?
>at the moment I'm doing
>while(test 1 ) ; do sox <input options> ... <pipe name> ...<output stuff> ; done;
>Among other things I want to avoid some annoying clicks as the output is closed and opened.

I wonder where the clicks come from? Are you outputting to a file or
a device? If device then maybe a little buffering will prevent underruns?
If a file then maybe your app isn't outputting silence at the beginning
and end of its run? You can concatenate silence, anything else may click.

Anyway, the pipe problem could be solved by putting another program
in front of sox that opens and keeps open the pipe that sox reads
but reopens the pipe that your unnamed app is writing and closing
as needed. I know this could be done in C, I'm not sure if a shell
script will work.

Maybe something like (untested):

  exec > $sox_pipe # make stdout the pipe that sox reads
  while true; do
    cat $app_pipe # this runs until the app closes the pipe
  done

HTH

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earwax

Hi,

I'm new to sox and interested in the earwax effect. According to the man
page, earwax:

Makes sound easier to listen to on headphones. Adds audio-
cues  to  samples in audio cd format so that when listened to
on headphones the stereo image is moved from inside your head
(standard for headphones) to outside and in front of the lis-
tener (standard for speakers).

What I don't understand is what is meant by "adds audio-cues to samples
in audio cd format". Will this not work, then, if I rip a cd to wav, add
earwax, and convert to ogg? What format do I need to use to write it to
cd?

I did take a wav and add earwax and convert to ogg. It sounds a little
tinny and muddy at the same time so I'm not sure if that's what I'm
supposed to hear or not.

Thanks,
Todd

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Re: earwax

On Wednesday 29 October 2003 07:30, Todd Slater wrote:
> Makes sound easier to listen to on headphones. Adds audio-
> cues  to  samples in audio cd format so that when listened to
> on headphones the stereo image is moved from inside your head
> (standard for headphones) to outside and in front of the lis-
> tener (standard for speakers).
>
> What I don't understand is what is meant by "adds audio-cues to samples
> in audio cd format". Will this not work, then, if I rip a cd to wav, add
> earwax, and convert to ogg? What format do I need to use to write it to
> cd?
>
> I did take a wav and add earwax and convert to ogg. It sounds a little
> tinny and muddy at the same time so I'm not sure if that's what I'm
> supposed to hear or not.

I would imagine Ogg (or mp3) would damage the earwax manipulation because 
those sort of compressors quite often destroy the phase relationship between 
channels.

You could run earwax AFTER ogg decompression and it would be OK..
I would suggest doing a listening comparison, eg
1. Rip a track
2. Listen to the rip
3. Listen to the rip through earwax
4. Oggify
5. Listen to the Ogg with earwax post decompression
6. Earwax then Oggify and listen

(Although TBH I don't particularly like how earwax sounds)

--

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 9A8C 569F 685A D928 5140  AE4B 319B 41F4 5D17 FDD5

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newbie sox problems

hi list
i am having a little trouble with SoX
(i'm running it on a g4 powerbook under os 10.2)

here's some feedback from my terminal:

/Users/roc/sox-12.17.4 % play munitu.aiff reverb 1.0 600.0 180.0
play: Command not found.

/Users/roc/sox-12.17.4 % sudo chmod u+x play
Password:
/Users/roc/sox-12.17.4 % play munitu.aiff reverb 1.0 600.0 180.0
play: Command not found.

/Users/roc/sox-12.17.4 % ./play munitu.aiff reverb 1.0 600.0 180.0
sox: Usage: [ gopts ] [ fopts ] ifile [ fopts ] ofile [ effect [
effopts ] ]
Failed: No output file?

/Users/roc/sox-12.17.4 % sx munitu.aiff reverb 1.0 600.0 180.0
/users/roc/desktop/monu.aiff
./sox: Volume value 'munitu.aiff' is not a number
/Users/roc/sox-12.17.4 % sx munitu.aiff reverb 1.0 600.0 180.0
/users/roc/desktop/monu.aiff
./sox: Volume value 'munitu.aiff' is not a number

/Users/roc/sox-12.17.4 % play munitu.aiff reverb 1.0 600.0 180.0
play: Command not found.

/Users/roc/sox-12.17.4 % ./play munitu.aiff reverb 1.0 600.0 180.0
sox: Usage: [ gopts ] [ fopts ] ifile [ fopts ] ofile [ effect [
effopts ] ]
Failed: No output file?
/Users/roc/sox-12.17.4 %

it goes on and on. can't see what i'm messing up, although there is
something i'm for sure doin wrong
ANY HELP?

Thanks a lot!
ps> please reply to my email address too, as i'm not part of the sox 
list

r

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keep listening on a pipe after EOF

Thanks for the responses.  Every time I see a question I wish I could answer too ...

>Can you just cat all the content >together before piping?

lots of files with different formats.  the audio parts of AVIs, some speex, some ogg, some win codecs ...

mplayer comes close to decoding the largest subset but it doesn't do all.

> I wonder where the clicks come from? 

> Are you outputti

Running several audio processes on that machine, all outputting to alsa.

When one shuts and restarts while others keep running (all using snd/dsp<..> )

> putting another program

> in front of sox that opens and keeps

> open the pipe that sox

I'll try /bin/tr next time i'm on that machine

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Re: keep listening on a pipe after EOF

On Wednesday 29 October 2003 09:40, sugarcoatednapalm wrote:
> > putting another program
> >
> > in front of sox that opens and keeps
> >
> > open the pipe that sox
>
> I'll try /bin/tr next time i'm on that machine

If they all output the same format (let's say raw 44.1kHz 16 bit linear) then 
you could do..
mkfifo /tmp/foo
(player1 -o - file1 ; player2 -o - file2 ; ... ) >/tmp/foo
sox ...

--

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 9A8C 569F 685A D928 5140  AE4B 319B 41F4 5D17 FDD5

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Separate channel processing

Hi

I started digging a bit into sox and have a few questions about the
channels supported by sox.

I read in the manpage that sox supports up to four channels, allowing them
to be split and merged. My questions:

- Is it possible to record a sound source (oss mixer) into one channel
only, leaving the others intact?

- Is it possible to have two different sound sources (for instance oss
mixer and one channel of a file) as input and store them in two separate
channels? They would have to synchonized of course.

My idea of course is a minimal four-track recorder based on sox, recording
different tracks into the same audio file. With the above two features,
this would be possible, I guess.

Bye
Tim

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