Also, only way to actually know if your compiler generates Neon is to ... read
the assembly!
Some common DSP tasks are implemented in the Ne10 library
http://projectne10.github.io/Ne10/doc/ which compiles to Neon on systems that
support it.
I have seen that nova_simd is good at generating neon code, but I never used it
stand-alone (only as part of Supercollider)
Best,Giulio
From: Nuno Santos <nunosan...@imaginando.pt>
To: music-dsp@music.columbia.edu
Sent: Wednesday, 25 May 2016, 14:15
Subject: Re: [music-dsp] Android related audio group / mailing list?
I have been testing DRC in 2 different Android devices: Nexus 9 (48000/128
buffer size) phone, Bq Aquaris M5 phone (48000/912) buffer size
Nexus 9 is a beast. I was able to run DRC with full polyphony (8 voices)
without any kind of glitch. The fake touches hack was essential to make this
happen. Without the fake touches hack I would hear glitches.Bq Aquarius M5 has
a very similar processor to Nexus 6P and I couldn’t have more than 2 voices
running without having some glitches.
All DSP code is C++. Reverb, Delay and Chorus represent half of the processing
effort the rest is for active voices. From my experiences I couldn’t see any
kind of effect in performance by compiling the code with NEON enabled. For
example, on my Bq phone for a 912 buffer size at 48000 my processing code would
take the following time with the following flags enabled:
-Os - ~5ms -O3 - ~5ms-Ofast - ~5ms-Ofast -mfpu=neon - ~5ms
No significant changes in performance with different flags. What kind of flags
are you guys using for your Android apps?
I don’t need to worry with this on iOS though. It simply works!
Regards,
Nuno Santos
Founder / CEO / CTO
www.imaginando.pt+351 91 621 69 62
On 25 May 2016, at 12:24, Jean-Baptiste Thiebaut <jean-bapti...@roli.com> wrote:
At JUCE / ROLI we've been working with Google for over a year to optimize audio
latency, throttle, etc for cross platform apps. Our app is featured also in the
Youtube video from Google IO, and it runs on some devices with performances
comparable to iOS.
Whether you are using JUCE or not, you're welcome to post on our forum
(forum.juce.com).
Sent from my mobile
On 25 May 2016, at 11:57, grh <g...@mur.at> wrote:
Hallo!
Thanks Nuno, it was a great demo ;)
LG
Georg
On 2016-05-25 12:46, Nuno Santos wrote:
Hi George,
I would be interested in such a community as well. Specially regarding
audio performance. We have recently released DRC (one of the apps that
has been featured on Google I/O Android High Performance Audio) and we
are mostly interested in squeezing performance out of it. It is
incredible the performance differences between iOS and Android. The DSP
code is shared among both and I still have glitch problems in Android
powerful devices.
One option could be creating a slack channel.
Regards,
Nuno Santos
Founder / CEO / CTO
www.imaginando.pt <http://www.imaginando.pt>
+351 91 621 69 62
On 25 May 2016, at 11:36, grh <g...@mur.at <mailto:g...@mur.at>> wrote:
Hallo music-dsp list!
Sorry for being off topic, but does someone know an active discussion
group / mailing list about android audio?
(There is quite a lot of progress lately, see for example [1])
5 years ago a list was announced here [2], which does not seem to be
active anymore ...
We just created a simple android audio editor [3] and would be very much
interested into a discussion of common infrastructure like audio
plugins/effects (like SAPA from Samsung) or copy/paste between audio apps.
I think that would be important for the audio ecosystem on Android.
Thanks for any hints,
LG
Georg
[1]: https://www.youtube.com/watch?v=F2ZDp-eNrh4
[2]:
http://music-dsp.music.columbia.narkive.com/zbYgicxy/new-android-audio-developers-mailing-list
[3]:
https://play.google.com/store/apps/details?id=com.auphonic.auphonicrecorder
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