Choppy audio with CM13

ejstubbs

Senior Member
Jul 6, 2011
388
48
0
Edinburgh
Thanks to amaces, lanchon and the TWRP team I've got Marshmallow installed and working on my Nook HD+. All seems to be well, except for a problem with the audio: it will play a music track OK at first time of asking but if I pause playback and then resume it the audio is choppy. It seems to repeatedly and rapidly stop & start, or maybe what it's actually doing is repeatedly dropping fractions of a second of sound - it's difficult to tell.

If I pause music playback and play a video instead the choppy audio problem carries over to the sound on the video: the video looks fine and plays back smoothly, and although it sounds awful the audio seems to stay in sync with the video, in the sense that sound doesn't obviously over- or under-run the accompanying moving image.

Using MX Player to watch a video, if I switch from HW to SW decoding and back again it seems to fix the audio.

The choppiness also seems to go away if I just stop using the tablet for a while - but it comes back as soon as I play/pause/play music again. The same goes if I restart the tablet.

Any clues to what's going on and/or how to fix this? I can't find any other references to this problem so maybe it is just me...
 

ajislav

Senior Member
Apr 1, 2011
412
212
63
Thanks to amaces, lanchon and the TWRP team I've got Marshmallow installed and working on my Nook HD+. All seems to be well, except for a problem with the audio: it will play a music track OK at first time of asking but if I pause playback and then resume it the audio is choppy. It seems to repeatedly and rapidly stop & start, or maybe what it's actually doing is repeatedly dropping fractions of a second of sound - it's difficult to tell.

If I pause music playback and play a video instead the choppy audio problem carries over to the sound on the video: the video looks fine and plays back smoothly, and although it sounds awful the audio seems to stay in sync with the video, in the sense that sound doesn't obviously over- or under-run the accompanying moving image.

Using MX Player to watch a video, if I switch from HW to SW decoding and back again it seems to fix the audio.

The choppiness also seems to go away if I just stop using the tablet for a while - but it comes back as soon as I play/pause/play music again. The same goes if I restart the tablet.

Any clues to what's going on and/or how to fix this? I can't find any other references to this problem so maybe it is just me...
Do you remember which version of CM you were on? Was it the last CM13 version by amaces, i.e. cm_ovation-ota-MOB31K.161125.zip?
I am still on CM13 and would like to hunt down the source of the bug.
I do have the 160819 build stored, so I will start with that
 

xdause

Senior Member
Jun 18, 2009
185
18
38
Thanks to amaces, lanchon and the TWRP team I've got Marshmallow installed and working on my Nook HD+. All seems to be well, except for a problem with the audio: it will play a music track OK at first time of asking but if I pause playback and then resume it the audio is choppy. It seems to repeatedly and rapidly stop & start, or maybe what it's actually doing is repeatedly dropping fractions of a second of sound - it's difficult to tell.

If I pause music playback and play a video instead the choppy audio problem carries over to the sound on the video: the video looks fine and plays back smoothly, and although it sounds awful the audio seems to stay in sync with the video, in the sense that sound doesn't obviously over- or under-run the accompanying moving image.

Using MX Player to watch a video, if I switch from HW to SW decoding and back again it seems to fix the audio.

The choppiness also seems to go away if I just stop using the tablet for a while - but it comes back as soon as I play/pause/play music again. The same goes if I restart the tablet.

Any clues to what's going on and/or how to fix this? I can't find any other references to this problem so maybe it is just me...
Did you find a solution to this? Did you change a rom that fixed it? I'm experiencing this same issue.
 

ejstubbs

Senior Member
Jul 6, 2011
388
48
0
Edinburgh
No, I never did manage to get it fixed - in the end I just stopped using the Nook :(

It's possible that ajislav's fix does cure it. If you get hold of his ROM and find that it does fix the problem, I'd be interested to know.
 

xdause

Senior Member
Jun 18, 2009
185
18
38
No, I never did manage to get it fixed - in the end I just stopped using the Nook :(

It's possible that ajislav's fix does cure it. If you get hold of his ROM and find that it does fix the problem, I'd be interested to know.
I had time so I installed https://forum.xda-developers.com/nook-hd/development/rom-lineageos-14-1-t3693886 lineage-14.1-20171216-UNOFFICIAL-ovation.zip with gapps 7.1 arm from 12/30/2017 and instantly opened a video in the default gallery app and it plays just perfect. I have the 32gb hd+.