a problem with snd.m file

1
Hello,
I run matlab 2007b on win xp with ptb 3.0.8

the following line (196) in snd.m file:

sound(signal',rate,sampleSize);

generates the following error:

-------------------------
??? Error using ==> playsnd
Data must have one or two columns.

Error in ==> sound at 41
playsnd(y,fs,bits);

Error in ==> Snd at 196
sound(signal',rate,sampleSize);
-------------------------

the problem is solved when changing the above line to:
sound(signal,rate,sampleSize);

however, i haven't found a reference to this in the forum or
anywhere else and have seen others, in the forum, in related
problems, using this line as it is.

could it be a bug?
thanks,
dan
2
Snd() expected stereo sound data as row-matrix,
with each row representing one sound channel.
You probably passed sound as column matrix,
so the transpose within Snd causes that error.

I've added an additional error check to future
releases of Snd.

Btw. If you just need cute little beeps for
feedback to your subject, the Beeper()
command may be more convenient.

If you need seriously accurate and flexible
sound, help PsychPortAudio for our new
PsychPortAudio sound driver is the better
choice.

-mario

--- In psychtoolbox@yahoogroups.com, "sinbur" <sinbur@...> wrote:
>
> Hello,
> I run matlab 2007b on win xp with ptb 3.0.8
>
> the following line (196) in snd.m file:
>
> sound(signal',rate,sampleSize);
>
> generates the following error:
>
> -------------------------
> ??? Error using ==> playsnd
> Data must have one or two columns.
>
> Error in ==> sound at 41
> playsnd(y,fs,bits);
>
> Error in ==> Snd at 196
> sound(signal',rate,sampleSize);
> -------------------------
>
> the problem is solved when changing the above line to:
> sound(signal,rate,sampleSize);
>
> however, i haven't found a reference to this in the forum or
> anywhere else and have seen others, in the forum, in related
> problems, using this line as it is.
>
> could it be a bug?
> thanks,
> dan
>