Play synths outside of a Routine/Task construct

Questions
1

I have been calling my synths till now only by wrapping them inside a routine/task and waiting on each iteration for a certain time etc. Now I am curious whether its possible to call synths in a more crazy way, e.g. by calling them when a trigger happens for instance by an Impulse. How could I do something like (the syntax is imaginary, I just am trying to convey what I mean)

(
{
var imp = Impulse.kr(10);
Synth(\mysynth, triggerer: imp)
}.play
)

so that the synth goes on each time a trigger happens. I am specifically interested in combining the various nice Demand classes for generating my data for arguments to the synth. How could I go about this?

2

Maybe its worth taking a look into the JITlib dialect?
I often use it to create a clock which runs all my Demandrate UGens

(
// create a trigger bus
Ndef(\trigger, {
	Impulse.kr(freq: 4.0);
});
)


(
Ndef(\foo, {
	var sig = Pluck.ar(
		in: WhiteNoise.ar,
		// reference the trigger bus
		trig: Ndef.kr(\trigger, 1),
		maxdelaytime: 0.2,
		delaytime: LFDNoise0.kr(4.5).exprange(100, 400).reciprocal,
		decaytime: LFDNoise3.kr(3.0),
	)!2 * \amp.kr(0.2);
	sig;
}).play;
)

// create a feedback loop between both

(
Ndef(\trigger, {
	// get the audio of the \foo bus
	var foo = Ndef.ar(\foo, 2).sum;
	// use it to impact the generation of triggers
	Impulse.kr(freq: 4.0) + Impulse.kr((Amplitude.kr(foo, releaseTime: 5.0) + 0.1).reciprocal.poll);
});
)

Ndef.clear;
3

You can also use trigger rate arguments rather than having a UGen triggering. The examples I posted at the bottom of the page might illustrate some ways to achieve what you’re looking for.