Re: Recording specific channels

This one I started then closed the screen share so there was no other activity. It stopped after 5 minutes.

minion-2-recording:~ minion$ ~/sox/rec -V5 -c 8 -b 16 -r 48k /Volumes/CAF3/test77.aif
/Users/minion/sox/rec:      SoX v14.4.2
time:     Feb 22 2015 14:58:07
uname:    Darwin minion-2-recording 22.6.0 Darwin Kernel Version 22.6.0: Wed Jul  5 22:17:35 PDT 2023; root:xnu-8796.141.3~6/RELEASE_ARM64_T8112 x86_64
compiler: gcc 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.56)
arch:     1288 48 88 L
/Users/minion/sox/rec DBUG coreaudio: audio device did not accept 2 channels. Use 18 channels instead.
/Users/minion/sox/rec DBUG coreaudio: audio device did not accept 44100 sample rate. Use 48000 instead.
/Users/minion/sox/rec WARN formats: can't set 8 channels; using 18

Input File     : 'default' (coreaudio)
Channels       : 18
Sample Rate    : 48000
Precision      : 32-bit
Sample Encoding: 32-bit Signed Integer PCM
Endian Type    : little
Reverse Nibbles: no
Reverse Bits   : no

/Users/minion/sox/rec DBUG aiff: converted 48000 to 100 16 37777777673 37777777600 0 0 0 0 0 0

Output File    : '/Volumes/CAF3/test77.aif'
Channels       : 8
Sample Rate    : 48000
Precision      : 16-bit
Sample Encoding: 16-bit Signed Integer PCM
Endian Type    : big
Reverse Nibbles: no
Reverse Bits   : no
Comment        : 'Processed by SoX'

/Users/minion/sox/rec DBUG effects: sox_add_effect: extending effects table, new size = 8
/Users/minion/sox/rec DBUG remix: 0:
/Users/minion/sox/rec DBUG remix:    0 0.333333
/Users/minion/sox/rec DBUG remix:    8 0.333333
/Users/minion/sox/rec DBUG remix:    16 0.333333
/Users/minion/sox/rec DBUG remix: 1:
/Users/minion/sox/rec DBUG remix:    1 0.333333
/Users/minion/sox/rec DBUG remix:    9 0.333333
/Users/minion/sox/rec DBUG remix:    17 0.333333
/Users/minion/sox/rec DBUG remix: 2:
/Users/minion/sox/rec DBUG remix:    2 0.5
/Users/minion/sox/rec DBUG remix:    10 0.5
/Users/minion/sox/rec DBUG remix: 3:
/Users/minion/sox/rec DBUG remix:    3 0.5
/Users/minion/sox/rec DBUG remix:    11 0.5
/Users/minion/sox/rec DBUG remix: 4:
/Users/minion/sox/rec DBUG remix:    4 0.5
/Users/minion/sox/rec DBUG remix:    12 0.5
/Users/minion/sox/rec DBUG remix: 5:
/Users/minion/sox/rec DBUG remix:    5 0.5
/Users/minion/sox/rec DBUG remix:    13 0.5
/Users/minion/sox/rec DBUG remix: 6:
/Users/minion/sox/rec DBUG remix:    6 0.5
/Users/minion/sox/rec DBUG remix:    14 0.5
/Users/minion/sox/rec DBUG remix: 7:
/Users/minion/sox/rec DBUG remix:    7 0.5
/Users/minion/sox/rec DBUG remix:    15 0.5
/Users/minion/sox/rec INFO sox: effects chain: input        48000Hz 18 channels (multi) 32 bits unknown length
/Users/minion/sox/rec INFO sox: effects chain: channels     48000Hz  8 channels (multi) 32 bits unknown length
/Users/minion/sox/rec INFO sox: effects chain: dither       48000Hz  8 channels         16 bits unknown length
/Users/minion/sox/rec INFO sox: effects chain: output       48000Hz  8 channels (multi) 16 bits unknown length
/Users/minion/sox/rec DBUG sox: start-up time = 0.103435
In:0.00% 00:05:20.42 [00:00:00.00] Out:15.4M [      |      ]        Clip:0
Done.
/Users/minion/sox/rec DBUG aiff: converted 48000 to 100 16 37777777673 37777777600 0 0 0 0 0 0
minion-2-recording:~ minion$

5/13/24, 10:55, "Jan Stary" <[email protected]>:

On May 13 15:57:43, [email protected] wrote:
> [* * * * * /Users… ]
>
> This looks promising, and I apologize for my ignorance (I have a bad habit of learning just enough code to do what I need), but it didn’t work for me.
>
> First, just to clarify, my sox folder is in the top level of my users account. I know it should be in the /bin/, but I get a new machine every year and keep forgetting how to move it and get the correct  path (~/.bash_profile?) and don’t want to pester our tech staff to do it, so in the command line I just have to type the extra ~/sox/rec.

The path can be whatever - as long as it is in your $PATH
you can just call 'sox'. You can also specify the PATH at the
beginning you your crontab. (This has nothing to do with sox.)

> Second, in this example I don’t understand where the file is
> being written to.

Exactly where the command says: /tmp/file-`date +\%s`.wav
Look under /tmp, see the files named file-whatever.

> Last, it didn’t create a new file, but just stopped after 1 minute.

Yes - it creates a new one at the beginning of the next minute.

        Jan


PS: Please quote the emails you are replying to properly
and don't top-post. It is customary in tech mailing list
to quote the relevant portion verbatim and comment inline.
Also, please wrap your lines - some pople (me included)
read this in a text terminal. Long lines make it unnecessarily
difficult to quote a bit from one "line" which is in fact
a whole paragraph.



>
>
> 5/13/24, 08:47, "Jan Stary" <[email protected]>:
>
> On May 13 09:26:10, [email protected] wrote:
> > On May 12 22:56:45, [email protected] wrote:
> > > If someone needs files from 1:35 to 3:15 we just give them 1 to 4.
> > > They combine them (with no seam at 2pm) [...] We routinely combine files
> > > into larger segments and we need them to be seamless.
> >
> > Ah, right, that's what you mean by "sample perfect". Let's try:
> >
> > $ sox -n sine.wav synth 10
> > $ sox sine.wav part%n.wav trim 0 5 : newfile : trim 0 5
> > $ soxi sine.wav part*.wav
> >
> > On my machine, that's 480000 split into 240000 + 240000 exactly
> > when I said 5s out of 10s.
>
> On the contrary, this is not sample perfect:
> a line in my crontab, starting a recording of one minute every minute.
>
> * * * * * /Users/hans/bin/rec -q /tmp/file-`date +\%s`.wav trim 0 00:01:00
>
> This does indeed record each minute of audio into
> an appropriately named file, but the transition is not seamless
> (as verified by playing a song longer than one minute).
>
> But if you change this to record your "predefined blocks"
> of a couple of hours, then perhaps overlaping a few samples
> will not matter if the seams are at silent times.
> Or you could record whole days, restarting at, say, 3 am.
>
> Jan
>
>
>
> _______________________________________________
> Sox-users mailing list
> [email protected]
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