Re: TempoClock:setMeterAtBeat

by James Harkins-2 :: Rate this Message:

Just occurred to me, setMeterNextBar could be simpler:

setMeterNextBar { arg beatsPerBar;

this.setMeterAtBeat(beatsPerBar, this.nextBar);

}

Any objections to committing this?

We might also want to think about modifying beatsPerBar_ to do the same thing -- that is, use this.nextBar instead of this.beats, with the rationale that (as noted in a comment to the set meter and beat method) confusion can result if you change the meter at a beat number other than a bar line. Currently the most intuitive way to change beatsPerBar does nothing to prevent that kind of confusion, and since that could be risky, maybe it would be a good idea to change the default behavior to avoid the potential point of failure.

Or this...

setMeterNextBar { arg beatsPerBar;

if(this.beats <= (this.nextBar - beatsPerBar)) {

this.schedAbs(this.nextBar, { this.setMeterAtBeat(beatsPerBar, this.nextBar) });

} {

this.setMeterAtBeat(beatsPerBar, this.nextBar);

}

... where the scheduling covers the case of reducing the bar length. That is, if the current beats per bar is 4 and you do setMeterNextBar(2) on the clock's beat 1, without the scheduling thatClock.play(something, -1) would be expected to schedule at the next bar line (before) but it would actually schedule at beat 2. Delaying the actual meter change in that case would eliminate the ambiguity.

hjh

On Apr 23, 2008, at 8:19 AM, James Harkins wrote:

Thanks, Tom, for the comments.

I may actually have to put this on the back burner, since I realized for my current needs, I'll likely have to change the meter variable in advance of the real bar line (so that other processes that evaluate later can use the information).

I agree that setMeterAtBeat should be left alone and any new convenience method should have a different name.

: H. James Harkins

: jamshark70@...

: http://www.dewdrop-world.net

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