Difference between revisions of "Tips And Tricks"
From Open Sound System
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=== Changing the default sound output used for /dev/dsp === | === Changing the default sound output used for /dev/dsp === | ||
| − | # $OSSLIBDIR/etc/installed_drivers influences the order of sound cards set by ossdetect. By removing other devices or moving the desired sound card to the first place, followed by running 'ossdetect -v', the default device can be modified. | + | # Relink /dev/dsp to the desired /dev/oss/.../ device. The device node matching the desired sound output can be discovered by running 'ossinfo -a'. If OSS insists on recreating /dev/dsp, simply add the appropriate linking command (typically ln -sf /dev/oss/.../ /dev/dsp) to $OSSLIBDIR/soundon.user. |
| + | # Alternative: $OSSLIBDIR/etc/installed_drivers influences the order of sound cards set by ossdetect. By removing other devices or moving the desired sound card to the first place, followed by running 'ossdetect -v', the default device can be modified. | ||
#: The root directory $OSSLIBDIR can be found by checking /etc/oss.conf. It is typically /usr/lib/oss/. | #: The root directory $OSSLIBDIR can be found by checking /etc/oss.conf. It is typically /usr/lib/oss/. | ||
| − | |||
=== Recording sound output of a program === | === Recording sound output of a program === | ||
Revision as of 01:23, 27 June 2008
Contents
Tips
Starting ossxmix minimized to tray on desktop startup
The '-b' option starts ossxmix in the background - minimized to tray if tray support is compiled in, iconfied window if not. The '-S' option prevents ossxmix from trying to use a system tray. ossxmix -Sb' will always start an iconified window.
- KDE: create a desktop shortcut in ~/.kde/Autostart with the command 'ossxmix -b'.
- Alternative: create a desktop shortcut in the same place, with the command "ossxmix -Sb'. Go to Applications->"Advance options" and select "Place in system tray".
- Gnome: go to Control center->Session->"Startup Programs" and add "ossxmix -b".
- X11 in general: edit the Xsession file. Make sure the tray program runs before ossxmix, or use the '-S' switch as well.
- See [1] for info on other environments.
Changing the default sound output used for /dev/dsp
- Relink /dev/dsp to the desired /dev/oss/.../ device. The device node matching the desired sound output can be discovered by running 'ossinfo -a'. If OSS insists on recreating /dev/dsp, simply add the appropriate linking command (typically ln -sf /dev/oss/.../ /dev/dsp) to $OSSLIBDIR/soundon.user.
- Alternative: $OSSLIBDIR/etc/installed_drivers influences the order of sound cards set by ossdetect. By removing other devices or moving the desired sound card to the first place, followed by running 'ossdetect -v', the default device can be modified.
- The root directory $OSSLIBDIR can be found by checking /etc/oss.conf. It is typically /usr/lib/oss/.
Recording sound output of a program
There are several methods to achieve this:
- Many drivers offer a 'vol' mixer control. If this is used as a recording source, than the current sound output will be recorded. Note that this is the mixed total of all sound played, not of a single program.
- ossrecord -ivol blah.wav
- vmix loopback driver can record the output of a program. Set vmix_numloops to 1 (or more) in vmix.conf, and make the program output to the newly created /dev/oss/vmix0/loop0 device. Then record from that device. e.g.
- ossplay test.wav -d/dev/oss/vmix0/loop0 &
- ossrecord test2.wav -d/dev/oss/vmix0/loop0
- OSS wrappers can be used to record the output of a program. vsound is one such wrapper. (vsound doesn't handle output to /dev/oss/* device nodes, but all OSS-supporting programs are/can be easily made to output to /dev/dsp).
- vsound ossplay test.wav
