On Thu, 2008-06-12 at 17:24 -0700, Mark Knecht wrote: > On Thu, Jun 12, 2008 at 4:30 PM, Roman Haefeli <reduzierer@xxxxxxxx> wrote: > > actually, my problem is not jackd related at all. i cannot use a > > samplerate other than 48k with any application i tried, not only with > > jackd. isn't alsa supposed to provide resampling, if necessary? > > > > i forgot to mention the hardware: > > Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio > > Controller (rev 03) > > > > roman > > > > Roman > Assuming I'm understanding correctly, in this case jack could and > should only be run at 48K. Jack is synchronized to the hardware, not > to any specific sound file or application data rate, so that it can > always receive and provide audio. Jack's first job is to make the > hardware happy and that's how it does it. > > Alsa does provide resampling. I'm not sure how to turn it on but I > suspect it's done through dmix or some other plugin structure. The > application can then source 44.1K samples/second and the plugin does > the resampling to 48K samples/second keeping the hardware happy. thanks for your explanataions. hm... i am running jack, because it makes the hardware transparent for all my applications. at home i start jackd on the rme rpm card, whereas when i don't have the audiobox with me, i start jack on the internal soundcard. all the apps i use don't have to care what card i am actually using, they just connect to jackd. the problem i have is this: when running jackd on my built-in card, it runs at 48k. when doing recordings of tracks generated by the jack clients, the resulting file has 48k, whereas i would like to be it 44.1. this means, i need to convert the resulting soundfiles, which is bad. if i could run jackd at 44.1, this wouldn't be necessary at all. the resampling would be happen on listening, but this wouldn't affect the recordings. are you saying, that it is simply not possible to run jackd over an alsa plugin, that does resampling or mixing? if so, does that mean, that jackd is kind of a special alsa client? why are alsa clients different? when alsaplayer is able to use -d plug:dmix, why isn't jackd? i seem to lack fundamental understanding of what alsa is about. roman ___________________________________________________________ Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
