Question

I’m trying to play a tone with python using the following script referenced here:
http://forums.xkcd.com/viewtopic.php?f=11&t=49360

python -c "freq=220;sec=2;from math import sin,pi;rate=8000;w=                 
[chr(127+int(127*sin(i*2*pi*freq/rate))) for i in     xrange(rate)]*sec;s=''.join(w);print s" >/dev/dspi in      
xrange(rate)]*sec

I get a permission denied error
/dev/dsp: Permission denied

I am root and my user is a member of the audio group.
Is there something I am missing? I am using ubuntu 11.04

Answer 1

It’s because /dev/dsp was removed in ubuntu
Missing /dev/dsp under Ubuntu

Running these commands instead will work:

 python -c "freq=220;sec=2;from math import sin,pi;rate=8000;w=[chr(127+int(127*sin(i*2*pi*freq/rate))) for i in xrange(rate)]*sec;s=''.join(w);print s"  > tmp_sound
 pacat tmp_sound    >padsp