Fork Code: Re: [improved] Gradually change TempoClock tempo [ accelerando / decelerando ] [extension]

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// Put this in your extensions directory
+ TempoClock {
    gradualTempo_ {|newTempo, beats=4, quant=1|
        if(beats <=1, {
            this.tempo_(newTempo);
        },{
            var startTime = this.nextTimeOnGrid(quant);
            this.schedAbs(this.nextTimeOnGrid(quant), {
                this.prRecurseGradualTempo(newTempo, beats);
            });
        });
    }

    prRecurseGradualTempo {|finalTempo, beatsRemaining|
        if(beatsRemaining <= 0, {
            this.tempo_(finalTempo);
        }, {
            var stepTempo = 1.linexp(0, beatsRemaining, this.tempo, finalTempo);
            this.tempo_(stepTempo);
            this.sched(1, {
                this.prRecurseGradualTempo(finalTempo, beatsRemaining-1);
            });
        });
    }
}

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