Fwd: SOUND function and Macs

[volker böhm]

On 29.07.2010, at 13:39, Ben Abbott wrote:

> On Jul 29, 2010, at 7:31 AM, volker böhm wrote:
> 
>> On 19.07.2010, at 00:23, Cary Martin wrote:
>> 
>>> Hello - I'm attempting to do some basic exploration of sound waveform
>>> analysis and manipulation using Octave and the Audio package. I
>>> apologize for such a newbie/ignorant question but if someone could
>>> please provide some assistance in configuring Octave and whatever
>>> external utilities are required to play sound files from Octave under
>>> Mac OsX 10.6.4 I would be greatly appreciative. I'm somewhat well
>>> versed in many of the basics of Octave but it is completely unclear to
>>> me what a pipe is in this context and how I am to establish the links
>>> to the external utilities (and to which ones). Anyway, when attempting
>>> to output a waveform to the speakers using this command
>>> 
>>> octave-3.2.2:10> sound(x,fs)
>>> 
>>> This response is received:
>>> 
>>> ssh: connect to host machine-mac-mini.local port 22: Connection refused
>>> warning: broken pipe -- some output may be lost
>> 
>> i had the same problem as you. as i'm still pretty new to octave myself, i 
>> might miss the point here, but
>> what seems to be going wrong (at least on my machine, which runs 10.6.4) is 
>> that the check in sound.m, 
>> if octave is run locally or not, fails.
>> 
>> if i run 
>> display=getenv("DISPLAY")
>> like in sound.m , i get
>> display = /tmp/launch-eHpt80/org.x:0
>> so, no hostname involved and the check fails.
>> 
> 
> Please set DISPLAY correctly,
> 
>       setenv ("DISPLAY", ":0.0")

ok, this fixes sound.m for me - thanks!

but i wonder what is causing this, as every time i launch octave, DISPLAY is 
set 'wrong'.
ok, i could probably 'fix' it, by putting setenv ("DISPLAY", ":0.0") in 
.octaverc.
but i'm still curious what's going wrong here, and if others maybe have the 
same problem.
volker.