[geekmaster]

I have a gmplay-2.0, which plays video in one thread and "noisy rhythms" audio in another thread. On my k5, it plays perfectly, using abou 12% CPU. Of course, knowing that the K3 eink update burns CPU, I need to test it there too... EDIT: On the K3, it burns 93% CPU (mostly in the eink update call). But the video plays full speed even with synthesized sound. EDIT2: After recompiling with optimization (-O3) it now uses 82% CPU on the K3 -- a useful improvement.

Old message:

Spoiler:

Strangely, on the K3, my original noisy demo has the sound fading in and out. It was working perfectly before. Strange change in behavior. Only difference is I use -O3 when compiling it this time. Restarting it now to try again on the K3.

EDIT: Restart did not help K3. The "noisy rhythms" demo drops in and out even compiled without -O3. It was working before on the DX/K3/K5. The K5 still works.

Strange...

I just tested twobob's tones demo, and it has the same "in and out" behavior. The dropouts are abrupt, but it resume with a fade-in (just like when you connect headphones for other audio). The interruptions are non-periodic (about 1 second in, 1 second out, varying by about 1/2 second in duration). It is a general sound problem affecting tones and noise demos on my k3, not fixed by a restart.

I *was* messing with amixer and alsamixer yesterday. I wonder if one of them wrote crap config data to /etc or something...

UPDATE: My K3 sound works (for noisy and tones) after turning down the volume. It must have some kind of overload detection that makes it drop out for a bit if it is too loud. I had it turned up for the quiet 8kb8mono.wav|aplay test (which is still quite even at max volume).

So, if there are sound dropouts, turn down the volume.

The next step in this path of combined Audio/Video evolution of gmplay is to use sound interleaved into the video file, instead of synthesizing it.