Re: Playback doesn't work if Jack MIDI is used

[Andreas Schneider]

Am 27.10.21 um 12:29 schrieb Richard Shann:
> On Mon, 2021-10-25 at 22:24 +0300, Andreas Schneider wrote:
>> Am 25.10.21 um 12:53 schrieb Richard Shann:
>>> On Sun, 2021-10-24 at 15:18 +0300, Andreas Schneider wrote:
>>>> If MIDI is configured to use Jack, start playback plays back two
>>>> notes
>>>
>>> are these actually audible?
>>
>> Yes, they are.
>>
>>>> and then stops. Also, the note at the cursor is changed to the
>>>> note
>>>> of
>>>> the first staff while playing back.
>>>
>>> Did you mean the cursor position changes?
>>
>> I mean that the note changes its value, e.g. in my example below the
>> c
>> changes to a g.
>
> This must be one of the most extraordinary side effects ever reported
> for Denemo! If the score is saved before you start playback does it
> become unsaved (the * appears) when the note changes value? If so,
> under gdb a break placed on the function score_status() i.e.
>
> gdb> b score_status
>
> should fire off when the note changes in value and "where" should
> reveal the route by which this happened...
There seems to be a loop in Jack. If I disconnect denemo from
midi_playback_1 in QJackCtl, the playback works normally.

Andreas