Reply to the Victor Lazzarini's message, wrote on 10/06/2015 at 23:12:
rand is white noise, which modulates your frequency generating lots of 
components and aliasing too. Try using randh (for steady held values) or 
randi (for linearly interpolated values) with 1/0.3 for frequency (so 
the rand value is drawn every .3 secs)
Hi Victor and thanks. Now in fact, there is no more white noise and I 
can hear a single, clean sine wave.
But, unfortunately it seems I have not correctly understood the timed 
jump mecanism: the sound passes from left to right but it remains at the 
same frequence.
Could you please help me to understand how to force jumps using time?

The script right now is the following:



-d -m0 -odac     ;;;realtime audio out


sr = 44100
kr = 4410
ksmps = 10
nchnls = 2
instr 2
inota = cpspch(p4)
ksl linseg 0, p3, 1
agg:
kfr randh 250, 2
kfr = kfr+inota
;prints "kfr %2.2f", kfr
timout 0, .1, cont ;jump each ... secs.
reinit agg
cont:
rireturn
a2 oscil 20000, kfr, 2
outs a2*(1-ksl), a2*ksl
endin


f2 0 4096 10 1
i2 0 2.5 7.02
i2 + . 7.07
i2 + 1 8.00
i2 + .5 9.0
i2 + 1.5 9.09
i2 + 4 10.02



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