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Re: Real-time category
Matthias Grob wrote:
> So if you want to record a full attack, you need to press the button
> about 7ms before you play it - which does not seem to be a problem for
When I record into software, I delay the audio signal by the fadetime,
and can then even hit exactly on the point without missing any attack. I
am recording always, it never stops, when I want it to go into a loop, I
route the delayed signal to the place I need it. This artificially
introduced latency never hurts, but I need less practice for being on time.
As instead of me learning how much I have to be in advance for a
trigger, my software learns how much I am usually late if I feel I am on
> you are exagerating.
I know, ;-)
> to trigger with audio is not that simple. Andy and
> me spent quite some time to figure it out for the Mathons plugins. Its
> never within a sample. And we want foot operation, and I doubt that a PC
> can garantee 1.5ms for that. But there is no need. Praxis counts!
I think if you just deliver a dc (a switch with a battery), even to an
audio interface which does not pass dc itself, you should easily detect
this loud click and use it as a trigger.
You are right, if you use something like a drum sound to trigger, it
takes a handfull of samples. But even then, if you know roughly the
waveform in advance, it should only create latency, not jitter.
But I agree, there is not much need, I never felt that my triggers where
> I dont think so. the 20us go for a RTOS when its clear that changing the
> task is needed. On the Powerbook there are loads of threads running
> already and there must be some priority avaliation that finially decides
> to care for the MIDI event, which then resides in some buffer and so
> on... I have no idea how long it takes, but I doubt you get to nano
Its probably still some microseconds, I agree, but its interupt driven,
that means it will interupt ongoing other tasks of the operating system
to receive it, get a timestamp, and then switches back. But I am sure
its much less than the duration of one Midi event, which is roughly 1 ms.
       
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