Re: sound() in Octave

[Sergei Steshenko]

----- Original Message -----
> From: Sergei Steshenko <address@hidden>
> To: Jordi Gutiérrez Hermoso <address@hidden>; Francesco Potortì 
> <address@hidden>
> Cc: "address@hidden" <address@hidden>
> Sent: Thursday, November 29, 2012 4:02 AM
> Subject: Re: sound() in Octave
> 
> 
> 
> 
> 
> ----- Original Message -----
>>  From: Jordi Gutiérrez Hermoso <address@hidden>
>>  To: Francesco Potortì <address@hidden>
>>  Cc: address@hidden
>>  Sent: Wednesday, November 28, 2012 11:59 PM
>>  Subject: Re: sound() in Octave
>> 
>>  On 28 November 2012 16:55, Jordi Gutiérrez Hermoso 
> <address@hidden> 
>>  wrote:
>>>   On 28 November 2012 16:51, Francesco Potortì 
> <address@hidden> 
>>  wrote:
>>>>>  Sound in Octave does not work unless you have an old Linux
>>>>>  installation that allows you to directly write to /dev/dsp. It 
> may 
>>  be
>>>>>  easier to use wavwrite to save your sound files and play them 
> with 
>>  an
>>>>>  external program.
>>>> 
>>>>   I see this on my system:
>>>> 
>>>>   $ ls -l /dev/dsp
>>>>   crw-rw---T+ 1 root audio 14, 3 Sep 26 16:16 /dev/dsp
>>> 
>>>   Yeah, but /dev/dsp doesn't even exist unless you're using OSS 
> or 
>>  have
>>>   some compatibility enabled for it.
>> 
>>  Oh, not to mention, you also have to make sure nothing else is using
>>  /dev/dsp, e.g. no desktop system or alternative audio system. All in
>>  all, the current Octave method for playing sound requires the planets
>>  to be perfectly aligned up to 8 significant figures and we really need
>>  something far more portable. Compatibility layers such as portaudio or
>>  SDL seem like the possible options.
>> 
>>  - Jordi G. H.
>>  _______________________________________________
>>  Help-octave mailing list
>>  address@hidden
>>  https://mailman.cae.wisc.edu/listinfo/help-octave
>> 
> 
> Or writing scripts that call, for example, 'sox' (sox.sf.net), and 
> 'sox' exists for all major OSes.
> 
> I am using 'sox' for capture and 'aplay' for playback for that 
> matter, but I'm on Linux. I can replace 'aplay' with 'sox' 
> if I want.
> 
> ...
> 
> Just making a _data_ interface to audio subsystem isn't all - from time to 
> time underruns/overruns happen, and they have to be taken care of.
> 
> Regards,
>   Sergei.
> 
> _______________________________________________
> Help-octave mailing list
> address@hidden
> https://mailman.cae.wisc.edu/listinfo/help-octave

Oh, and if one thinks of using an external program with Octave (or any other 
program capable of opening files) named pipes ( 
https://en.wikipedia.org/wiki/Named_pipe ) are quite handy. Of course, on 
Windows there are some idiosyncrasies ( 
https://en.wikipedia.org/wiki/Named_pipe#In_Windows ), but still usable.

Regards,
  Sergei.

>