On Wed, July 25, 2012 6:25 pm, Florian Paul Schmidt wrote: > On 07/25/2012 04:31 PM, Neil C Smith wrote: >> On 25 July 2012 15:01, SxDx <sed@xxxxxxx> wrote: >>> On my device (un-rooted) I have at best around 40ms. >>> So for me, android is a no go for live stuff. ... >>> We are in 2012 dear google, linux can go much lower than that, >>> the devices out there are blazzingly fast, 40ms is insane. >> Android 4.1 brings ~10ms latency *on the right hardware* >> >>> But well, that's life. This is "consumer electronics" after >>> all. If angry bird works... >> There are use cases for low latency audio on consumer devices, and I >> think there is a push for a better performing audio stack. > > Note though, that in this example program, while the audio output is > rendered in C, the final pass to the AudioDevice goes through java (the > java code calls the JNI code to render into a buffer). But since under > the android OS, there's just a linux system, it should be possible > (maybe with root access and some hackery) to access the ALSA layer > directly. And then it only depends on the audio hardware in the device. > Some people are reporting 512 period buffers are stable with 4.1 but the claimed latency of ~10ms appears to be related more to the loading of samples than realtime streaming. I.e jack would have a hard time still at low latency. So far no one has reported better than 40ms for realtime streaming. That is still wip. You can install a cyanogenmod and get direct access to the alsa layer if you want. I haven't seen any test results that have explored that option for realtime latency yet. I can't do it because cyanogen mod doesn't run on my devices. I'm planning to get a new nexus at some point. I like the 10 inch form factor for tablets. IMO Google should have fired the person running the audio dev team for screwing up so badly for three years running. -- Patrick Shirkey Boost Hardware Ltd _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
