Re: [Alsa-user] alsa loopback in 384khz
Olivier Schmitt wrote: > wget ftp://ftp.alsa-project.org/pub/driver/alsa-driver-1.0.23.tar.bz2 Do not use that package; it is outdated. The ALSA drivers are part of the kernel. > nano ./drivers/aloop-kernel.c sound/drivers/aloop.c > The modification is juste to change 192000 by 768000 ? like: > > => > ... > .rates =SNDRV_PCM_RATE_CONTINUOUS | > SNDRV_PCM_RATE_8000_768000, This entry is wrong; replace it with .rates =SNDRV_PCM_RATE_CONTINUOUS, > .rate_max = 768000, Yes. You also need to change the number in loopback_rate_info(). > Can I juste compiling the allop module or i must compilling and install all? If you have the source and the exact configuration of your running kernel, it would be possible to recompile only this driver. But if you do not know what you're doing, compiling the entire kernel is safer. https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel https://wiki.ubuntu.com/KernelTeam/GitKernelBuild Regards, Clemens -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] alsa loopback in 384khz
Olivier Schmitt wrote: > how can we use some alsa loopback in 384khz or 768khz sample rate. The upper limit of 192 kHz is hardcoded in the snd-aloop driver. Changing it would require recompiling it. Are you able to do that? Regards, Clemens -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] alsa loopback in 384khz
On Thu, Jun 15, 2017 at 7:48 AM, Olivier Schmittwrote: > > Hello, > > I juste whant to ask the community how can we use some alsa loopback in > 384khz or 768khz sample rate. > > Dont ask me why, the reply is that i am an radio ham and we use lot of > loopback for signal processing. > > But for somme reason we need more than 192khz of sample rate. > > Thanks in advance dear community members. Heh, sounds like fun. What hardware would you be using? I've often thought of projects where I need higher sample rates (like doing bode plots of power supply and opamp stability). It would be handy if there were a simple way of getting to those rates directly as sound samples so I could use the regular audio processing chain I'm familiar with. -Caleb > > > -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > ___ > Alsa-user mailing list > Alsa-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user