Recorded regions not always drawing in real time (Ardour/Mixbus, Linux)

When I record, sometimes the regions do not draw in real time. For example, if I record drum tracks, such as 10 tracks at once, some tracks draw in real time and some do not. This has happened with several earlier versions of Ardour and Harrison Mixbus. Now 9.2.0 I use Linux. This has happened with Ubuntu Studio and earlier also with AV Linux.

Additionally, the record button does not always turn red, even though recording is actually enabled. However, the audio is recorded correctly on those tracks. When the recording stops, the regions are drawn correctly.

They are never drawn in real (wallclock) time. Record regions are updated once data is flushed to disk, usually every 5 seconds.

What I mean is exactly this: on some other tracks the regions appear about every 5 seconds. But on the tracks where they don’t, they only appear and become visible when the recording stops.

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This is interesting to me. Could you possibly make a screen recording of what all this looks like?

Also, beyond the recording button occasionally not turning red, are there any other weird, visual ‘artifacts’/‘quirks’ you’re experiencing? :thinking:

see also

I understand the principle behind this.

But I’m wondering about something in practice. When I’m recording something like drums to multiple tracks, tracks 1–8 behave exactly as described — the regions appear as the data gets written to disk. However, tracks 9–12 (for example) don’t show any regions until I stop the recording. All the audio is still recorded normally and appears after I stop.

Often when this starts happening, the same thing also occurs with any subsequent overdubs. It makes working a bit difficult when you can’t see during recording what has already been written.

Is this expected behavior in some situations, or could it point to some setting or perhaps a disk system bottleneck?

(Note: this message was machine-translated from the original language.)