[LAU] Input to aplay to make a file instead?

[Bill Purvis]

On 18/04/2020 13:20, John Murphy wrote:
> On Sat, 18 Apr 2020 11:53:35 +0100 Bill Purvis wrote:
>
>> On 18/04/2020 11:05, John Murphy wrote:
>>> On Sat, 18 Apr 2020 09:55:12 +0100 Will Godfrey wrote:
>>>   
>>>> On Sat, 18 Apr 2020 09:50:30 +0100
>>>> John Murphy <rosegardener at freeode.co.uk> wrote:
>>>>   
>>>>> I use a program which plays regions of various .wav files. Its
>>>>> output pipes into aplay like: '| aplay -f FLOAT_LE -c 2 -r 48000'
>>>>>
>>>>> To where can I pipe its output, instead, to make a new .wav file,
>>>>> or make a compressed file? Preferably faster than the region(s)
>>>>> take to play.
>>>>>
>>>>> Or, if not, make aplay write to a file instead of playing?
>>>>>
>>>>> Thank you.
>>>>>      
>>>> Use arecord instead.
>>>>   
>>> Thanks. I saw the -C switch (or arecord), but didn't try it because
> [...]
>> You should be able to use sox to do that, specify the input format, and
>> an output format and it should sort it out. I've not done this for ages,
>> but it's the sort of thing sox was created for.
>>
>> Bill
>>
> Looks promising, thanks:
>
> SoX can be used in simple pipeline operations by using the special filename
> `-' which, if used as an input filename, will cause SoX will read audio data
> from `standard input' (stdin)
>
> Can't quite do it though. aplay gets -f FLOAT_LE -c 2 -r 48000 I've tried:
>
>   | sox -t raw -r 48k -c 2 -L -e float - dump-SOX-test.wav
> sox FAIL formats: bad input format for  `-': data encoding or sample size was not specified
>   | sox -t wavpcm -r 48k -c 2 -L -e float - dump-SOX-test.wav
> sox FAIL formats: can't open input  `-': WAVE: RIFF header not found
>
> I'm guessing though really.
Lately I've been simply using audacity to chop up sound files, mostly just
trimming off the lead-in and any tail from the file, but it's versatile 
enough
to do just about anything. Converts the formats, etc.

Bill

-- 
+----------------------------------------+
| Bill Purvis                            |
| email: bill at billp.org                  |
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