16 Apr
2015
16 Apr
'15
5:41 p.m.
interesting article on Android's latency
http://superpowered.com/androidaudiopathlatency/
via Hacker News news.ycombinator.com
16 Apr
16 Apr
7:11 p.m.
On Thu, 16 Apr 2015 09:41:11 -0600, John Hammen wrote:
interesting article on Android's latency
http://superpowered.com/androidaudiopathlatency/
via Hacker News news.ycombinator.com
Thank you for sharing this.
Assumed Android devices one day should be usable for audio, I wonder if
they suffer from a known iPad issue too. It's true that latency isn't
an issue when using an iPad, but battery charge could become an issue.
I still need to use a stop watch, but I guess after around 5 or 6 hours
and sometimes even after less hours, my iPad 2 turns off. If the iPad
then is plugged to the power supply, it anyway can't be used.
Loss of battery charge by the power consumption of a
DAW/MIDI sequencer -> Audiobus -> parametric EQ
chain needs more power, than the 10 W power supply does recharge the
battery. IOW for Apple tablet PCs compulsory breaks interrupt creative
work for hours, as soon as the battery needs to be recharged.
Apple devices need much improvement too, not regarding latency,
but regarding the power consumption. They are far away from being
perfect. The OS might be good, but the hardware isn't. I read that
people using the iPad 3 for office work, stopped using them, regarding
the power supply issue.
Is it possible to run an Android device by a power supply, when the
battery is empty?
Regards,
Ralf
7:17 p.m.
On 04/16/2015 07:10 PM, Ralf Mardorf wrote:
Is it possible to run an Android device by a power
supply, when the
battery is empty?
nexus7 (2012) here, doesn't work, no. If you run something that smokes
more battery than the speed of charging then you're doomed.
These computers were really badly engineered (for people using them
for hours and hours at least). Nice cash machine though.
7:28 p.m.
On 04/16/2015 07:10 PM, Ralf Mardorf wrote:
[...]
Is it possible to run an Android device by a power supply, when the
battery is empty?
Regards,
Ralf
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev(a)lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-dev
There is no such thing as "the one representative android device" since
android runs on many different devices, made by different manufacturers.
Comparing Android to Apple is a bit of a problem here.
Basically, it depends on the device and the workload. For example I can
do a lot of stuff with a Galaxy S3 Phone and the power reserves of the
(stock) power supply are adequate for usual tasks, even for installing
updates, and demanding tasks. For a tablet, this may be entirely
different, since the screen is much bigger.
Cheers, -Markus
11:31 p.m.
On Thu, 16 Apr 2015, John Hammen wrote:
interesting article on Android's latency
http://superpowered.com/androidaudiopathlatency/
via Hacker News news.ycombinator.com
What the article totally misses... Latency is about more than clearing
audio path obsticles. Can the kernel be made lowlatency? What other
proprietary globs might demand cpu/bus time with no regard for anything
else? I am thinking about my experiences with my netbook (back when they
made those) where the wifi made anything less than about 20ms (one way)
impossible without xruns. Add bluetooth, and USB issues and who knows what
else. Many of the android units are really cheap (sub $100 mark) and so
must use the least expensive.... everything. The CPU may be yesterdays
"super computer" but the rest is not. Lowlatency audio with artifacts is
not going to help.
Yes the tablet I have (and my wife's phone) have way too much latency to
be useful for anything beyond remote control of mixers etc. (I wouldn't
want to do live fades that way :)
It will be interesting to see if Touch will be any better. (still uses the
android kernel to make the most of the HW drivers.)
--
Len Ovens
www.ovenwerks.net
3552
days inactive
3552
days old
linux-audio-dev@lists.linuxaudio.org
4 comments
5 participants
participants (5)
-
Cedric Roux -
John Hammen -
Len Ovens -
Markus Seeber -
Ralf Mardorf