Using 4 controls : Volume , Balance, Fade and Bass to control six or
eight channels is not easy especially when gnome-media cannot
save/restore the settings of this four controls
This bug is in pa_cvolume_set_balance() since left and right will be zero when
you set the volume to 0%
655 get_avg_lr(map, v, &left, &right);
656
657 m = PA_MAX(left, right);
658
659 if (new_balance <= 0) {
660 nright = (new_balance + 1.0f) * m;
661 nleft = m;
662 } else {
663 nleft = (1.0f - new_balance) * m;
664 nright = m;
665 }
666
667 for (c = 0; c < map->channels; c++) {
668 if (on_left(map->map[c])) {
669 if (left == 0)
670 v->values[c] = nleft;
671 else
672 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t)
v->values[c] * (uint64_t) nleft) / (uint64_t) left);
673 } else if (on_right(map->map[c])) {
674 if (right == 0)
675 v->values[c] = nright;
676 else
677 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t)
v->values[c] * (uint64_t) nright) / (uint64_t) right);
678 }
679 }
680
pa_cvolume_get_balance() return 0 when
623 if (left == right)
624 return 0.0f;
--
Changing volume to 0% breaks channel ballance
https://bugs.launchpad.net/bugs/672420
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