Hi All, I have referred to the document on the WiKi at http://www.alsa-project.org/main/index.php/Matrix%3aModule-dummy, but I require some additional help, as I am a bit of a noob at all of this. I am looking to get a Dummy Audio device working on the Raspberry Pi running Raspian (which is based on Debian). The Raspberry Pi only has an analogue audio output as standard; however, I require a specific application that requires both audio input and output (PJSIP), even though for my instance we will not be using the input. From the WiKi page above, I can run the following command which sets up a Dummy sound device and is enough to get PJSIP working: I’m not sure what the other commands do (modprobe snd-pcm-oss ; modprobe snd-mixer-oss ; modprobe snd-seq-oss) but as far as I can see, I do not need them. Once the above command is run, I can see a new card list in the ‘/proc/asound/cards’ file such that it shows: 0 [ALSA ]: BRCM bcm2835 ALSbcm2835 ALSA - bcm2835 ALSA bcm2835 ALSA 1 [Dummy ]: Dummy - Dummy Dummy 1 However, I come unstuck when I reboot and the sound card disappears. In the WiKi, you refer to editing the /etc/modules.conf file, however both this and the other file referenced (/etc/conf.modules) do not exist in this distribution. There is a Note section that refers to Debian, but again the folder reference (/etc/modutils/) does not exist. In fact, the application modutils does not exist and trying to install it using: sudo apt-get install modutils Results in the following error:
I can see that in this distribution the kernel module soundcore has indeed been renamed to snd, and I can create a symbolic link to the file using:
But there is no such application called update-modules I have created a file called /etc/modules.conf and put in the following text, but of course this doe nothing and on reboot the card still disappears. # OSS/Free portion - card #1 So, what can I do? Any help would be very much appreciated. One other point, there is a link in the WiKi that is supposed to point some instructions about copy to the text into the module.conf file (just over half way down), however, the link is broken. I assume it’s just linking to some instruction about using something like nano, but it might still be worth fixing for future reference. Regards, Chris |
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