Sound recording / output is sometimes out of sync with display about arcade-learning-environment

[mhauskn]

Two notes and a possible fix:

1. I've been unable to reproduce the out-of-sync sound on Linux. I can only get it to happen on OSX.
2. I think we can fix it by reducing ALE's "fragsize" from 512 (default) to 64. In sharedLibraryInterfaceExample we can write:

ale.setInt("fragsize", 64);

With this fragsize I am unable to get the audio to delay after ~100 attempts. Fragsize is the size of the buffer into which audio is created. Low frag sizes result in more "in-sync" sound but require more computation. Some info is here:

http://atariage.com/forums/topic/134888-stella-audio-settings-what-does-each-thing-do/

[mgbellemare]

I've never noticed anything wrong with the sound in Stella. I'm wondering
if somehow
something got busted in our setting up the OSystem... I'll take a look into
it tomorrow.

On Fri, Apr 24, 2015 at 9:11 PM, Matthew Hausknecht <
[email protected]> wrote:

Two notes and a possible fix:

1. I've been unable to reproduce the out-of-sync sound on Linux. I can
   only get it to happen on OSX.
2. I think we can fix it by reducing ALE's "fragsize" from 512 (default)
   to 64. In sharedLibraryInterfaceExample we can write:

ale.setInt("fragsize", 64);

With this fragsize I am unable to get the audio to delay after ~100
attempts. Fragsize is the size of the buffer into which audio is created.
Low frag sizes result in more "in-sync" sound but require more computation.
Some info is here:

http://atariage.com/forums/topic/134888-stella-audio-settings-what-does-each-thing-do/

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