(still) Audacity start trouble
When I run audacity in my mandarake 10.1 linux, I receive the message:
There was an error acessing the I/O shell. There won't possible audio read/write Error: Host error If I hit a "ps a" command in the konsole the processes listed don't include anyone that suggest to be using any audio feature. :cry: Ricardo Sao Paulo - Brazil I've posted the same questions some days later and a polland guy give a response that seems to doesn't solve the problem... |
this can be two things
permissions please post output from ls -l /dev/dsp and the output from grep audio /etc/group or there is a sound daemon running please post output from ps -C esd and ps -C artsd ps a i don't think is going to tell you what you need to know |
Below the output from the commands you ask me for. Hope you can find the trouble...
Thank you very much... >this can be two things >permissions >please post output from >ls -l /dev/dsp [ricardo@localhost ricardo]$ ls -l /dev/dsp crw-rw---- 1 ricardo audio 14, 3 Jul 21 20:40 /dev/dsp [ricardo@localhost ricardo]$ ============= >and the output from >grep audio /etc/group [ricardo@localhost ricardo]$ grep audio /etc/group audio:x:81: [ricardo@localhost ricardo]$ ============= >or there is a sound daemon running >please post output from >ps -C esd >and >ps -C artsd [ricardo@localhost ricardo]$ ps -C esd PID TTY TIME CMD [ricardo@localhost ricardo]$ [ricardo@localhost ricardo]$ ps -C artsd PID TTY TIME CMD 4316 ? 00:00:05 artsd [ricardo@localhost ricardo]$ ============= >ps a >i don't think is going to tell you what you need to know [ricardo@localhost ricardo]$ ps a PID TTY STAT TIME COMMAND 3922 tty1 Ss+ 0:00 /sbin/mingetty tty1 3923 tty2 Ss+ 0:00 /sbin/mingetty tty2 3924 tty3 Ss+ 0:00 /sbin/mingetty tty3 3925 tty4 Ss+ 0:00 /sbin/mingetty tty4 3926 tty5 Ss+ 0:00 /sbin/mingetty tty5 3927 tty6 Ss+ 0:00 /sbin/mingetty tty6 4358 pts/2 Ss 0:00 /bin/bash 4409 pts/2 S 0:00 /bin/sh /usr/bin/firefox 4428 pts/2 S 0:00 /bin/sh /usr/local/src/firefox-installer/run-mozilla. 4433 pts/2 Sl 0:58 /usr/local/src/firefox-installer/firefox-bin 4702 pts/2 R+ 0:00 ps a [ricardo@localhost ricardo]$ |
Quote:
you can do a few things to fix 1) (temporary) kill it kill -C artsd then start audacity 2) (permanent) go into kde controll and uncheck "enable sound system" restart kde |
Done!
Thank you very much! It will be therefore so usefull if you'll explain what had happen... By this way we all will learn more about linux and its sound system... |
when you run a sound server like artsd , esd, jack
the sound server takes controll of and holds a lock on the sound system all applications that need the sound system then have to output to the sound server. this is often done through a plugin like in xmms. audacity is very old and only supports direct OSS output and can't go through the sound server. it just reads from and dumps to /dev/dsp Linux sound has evolved alot from oss and arts/esd (arts was the first software mixing and sound polling) to ALSA (which can do it's own sofware mixing and provides OSS emulation) and a new advanced sound server JACK different applications can use different aspects of it all and there is still no standard someday there may evolve a standard all applications can use and things will be easier. i think kde will eventually drop arts |
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