artfwo/aalink

Async Python interface for Ableton Link

aalink's Issues

Creating the link object *sometimes* changes the tempo.

As far as I can see, I have to provide a float tempo value when creating the Link object, e.g.

    link = Link(120, loop)
    link.enabled = True

Most of the time, this doesn't change the tempo in the linked Ableton, but adjusts to the tempo that is currently set in Ableton. But sometimes it is the other way around, and the tempo in Ableton is changed to the value provided in the constructor, roughly 10% of my trials. Is there a way of controlling this?

I tried using strange values like None, float('nan'), but that just yields an error message or non-working code, respectively. I also tried proving -1 or 0 as tempo, but that causes the same behavior as using 20 (sometimes setting Ableton's tempo to 20, or not changing the tempo most of the time).

What can I do?

Thanks for any help,
Best, Boris

Terminate called without an active exception

After migrating from pybind11 to nanobind, this can happen when exiting aalink scripts, as the scheduler thread isn't always joined properly:

Traceback (most recent call last):
  File "/home/art/aalink/build/./test.py", line 25, in <module>
    asyncio.run(main())
  File "/usr/lib64/python3.11/asyncio/runners.py", line 190, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.11/asyncio/runners.py", line 123, in run
    raise KeyboardInterrupt()
KeyboardInterrupt
terminate called without an active exception
Aborted (core dumped)

Detaching the thread instead of joining might lead to more segfaults, so the best solution here is probably resolving any potential cyclic dependencies to ensure that Scheduler destructor is invoked when link is deleted.

See https://nanobind.readthedocs.io/en/latest/typeslots.html for some docs on resolving cyclic references.

To reproduce consisently, build in debug mode and increase the sleep timeout in scheduler thread to 100-500ms.

How to determine the current position in the bar?

Hi, thanks for providing this library, the example worked out of the box for me.

Currently, my code listens to MIDI clock messages generated by Ableton to "slave" my code to Ableton.
Now I would like to use Link to replace MIDI clock syncing, so I use link.sync(1/24) to get a clock-message-like signal, that works fine.

In addition, I would like to get the current beat count. I looked into the code and saw the functions to retrieve the attributes beat, time, phase, and so on. This enabled me to check, where on a given beat I am, e.g., 7.0 is precicely on the beat, 7.5 an 8th note after that, and so on.

But how do I determine, where in a given bar I am, e.g., that 7.0 is the 2 in a bar? It seems that beat and the return value of sync just counts from 0, but the relation to the beat is not fixed.

Thanks for any help,
Boris