cSounds.com - tutorials - An Instrument Design TOOTorial

Now we will add the ability to do a linear crossfade between any two of our four basic waveforms. We will employ our delayed vibrato scheme to regulate the speed of the crossfade.

 Navi

cSounds.com

 [+] Home

Listen

 [+] Toot07.mp3 157k

Toot07.orc

 ``` instr 7 ifunc1 = p11 ; initial waveform ifunc2 = p12 ; crossfade waveform ifad1 = p3 * p13 ; calculate initial fade (% of dur) ifad2 = p3 - ifad1 ; calculate remaining duration irel = .01 ; set vibrato release time idel1 = p3 * p10 ; calculate initial delay (% of dur) isus = p3 - (idel1 + irel) ; calculate remaining duration iamp = ampdb(p4) iscale = iamp * .166 ; p4=amp inote = cpspch(p5) ; p5=freq k3 linseg 0, idel1, p9, isus, p9, irel, 0 ; p6=attack time k2 oscil k3, p8, 1 ; p7=release time k1 linen iscale, p6, p3, p7 ; p8=vib rate a6 oscil k1, inote*.998+k2, ifunc2 ; p9=vib depth a5 oscil k1, inote*1.002+k2, ifunc2 ; p10=vib delay (0-1) a4 oscil k1, inote+k2, ifunc2 ; p11=initial wave a3 oscil k1, inote*.997+k2, ifunc1 ; p12=cross wave a2 oscil k1, inote*1.003+k2, ifunc1 ; p13=fade time a1 oscil k1, inote+k2, ifunc1 kfade linseg 1, ifad1, 0, ifad2, 1 afunc1 = kfade * (a1+a2+a3) afunc2 = (1 - kfade) * (a4+a5+a6) out afunc1 + afunc2 endin```

Toot07.sco

 ```f1 0 2048 10 1 ; Sine f2 0 2048 10 1 0.5 0.3 0.25 0.2 0.167 0.14 0.125 .111 ; Sawtooth f3 0 2048 10 1 0 0.3 0 0.2 0 0.14 0 .111 ; Square f4 0 2048 10 1 1 1 1 0.7 0.5 0.3 0.1 ; Pulse ;in st dur amp frq atk rel vbrt vbdp vbdl stw ndw crstm i7 0 5 96 8.07 .03 .1 5 6 .99 1 2 .1 i7 6 5 96 8.09 .03 .1 5 6 .99 1 3 .1 i7 12 8 96 8.07 .03 .1 5 6 .99 1 4 .```