Audio Settings SetDSPBufferSize Causes audio to stop completely

Audio & Video
1

Hi !

I’m making a simple piano app for android that can play midi files, so far everything is going well except that i have a minor latency issue for playing audio samples.

I tried to set DSPBufferSize to Best Latency in the project settings , it gave me a lot better latency on my android galaxy nexus (buffer length is 256 with Best Latency chosen) , but still , 256 seems not enough for a music app, so i tried to set DSPBufferSize to even a lower value with a script:

function Awake () {
AudioSettings.SetDSPBufferSize(256, 4);
print (“LowLatency”);

}

on pc, it worked perfectly , i was able to go as far as 200 of buffer length, but on mobile, as soon as i run the script, audio stops completely , i tried all bufferlenght values (1024 , 512 , 256 , 200 , 128 ) but all of them destroys the audio until i restart the app (the app keeps running fine but without audio)
…any help would be appreciated
Thanks in advance

2

anyone?

3

anyone that knows how to do it will get his name in the credits in the app when its released plus a link to his profile/website

Cm’on guys it can’t be that hard!

4

Old thread, but since many people have sound delay issues on android, here is what i have found out (no solution unfortunately)

I have an HTC One S and a Nexus 7 (1st gen).
The HTC has horrible sound delays no matter what i try regarding buffer and audio formats. I could use no other buffer size than 256, so i guess its device specific. The Nexus 7 has no delays what so ever, so i just decided to stick with the default best latency setting. It has some touch input latency though, but the sounds fit the visuals perfectly - i think this is important to distinguish between touch → sound and gameevent → sound.
I realize this makes it impossible to guarantee any kind of user experience regarding sound, as it differs too much from device to device. Its a shame.

5

Yes it is…i ended up buying ipad 4 , porting the project to ios and forgetting about android until unity fixes their engine …iOS has incredibly low latency support with unity.

6

When you set the dsp buffer size all audio stops. Simply grab all the audio sources that were playing and run Play on them again.

7

Unfortunately its not a Unity issue. If it was they could fix it.

It’s an Android issue (the audio lag, not the total non-functioning), which they addressed in a more recent Update, badly. It turns out that their “Low latency” trickery API stuff only works on specific devices, most of which are made by google themselves; the rest unable to benefit at this time.

I believe most devs who have dealt with this issue have done so using FMOD Ex. It also appears to be a closely guarded trade secret, as it certainly separates the wheat from the chaff.

1 Like