Dear Csound community,

How would you go about turning the following instrument (Risset Bells, from
the Dr Boulanger collection of Csound Instruments) into a real-time
instrument?
Clearly, the problem has to do with getting rid of p3 in the orchestra file,
while retaining the timber quality.

The code is below.

Thanks! (It's a great instrument. It would be an asset for everyone if we
could play it live.)



; RISSET'S INSTRUMENT DESIGN FO A BELL-LIKE SOUND



sr        =         44100

kr        =         4410

ksmps     =         10

nchnls    =         1



          instr 1,2,3,4



; p3      =         duration

; p4      =         freq in Hz

; p5      =         amplitude



; PEAK AMPS OF THE PARTIALS ARE A FUNCTION OF THE AMP OF THE LOWEST PARTIAL



i1        =         p5

i2        =         p5*0.67

i3        =         p5*1.35

i4        =         p5*1.80

i5        =         p5*2.67

i6        =         p5*1.67

i7        =         p5*1.46

i8        =         p5*1.33

i9        =         p5*1.33

i10       =         p5*0.75

i11       =         p5*1.33



; DURATIONS OF THE PARTIALS ARE A FUNCTION OF THE DURATION OF THE LOWEST
PARTIAL

                    

i12       =         p3

i13       =         p3*.9

i14       =         p3*.65

i15       =         p3*.55

i16       =         p3*.325

i17       =         p3*.35

i18       =         p3*.25

i19       =         p3*.2

i20       =         p3*.15

i21       =         p3*.1

i22       =         p3*.075



; FREQUENCIES OF THE PARTIALS ARE A FUNCTION OF THE FREQUENCY OF THE
FUNDAMENTAL



i23       =         p4*.56

i24       =         (p4*.56)+1

i25       =         p4*.92

i26       =         (p4*.92)+1.7

i27       =         p4*1.19

i28       =         p4*1.7

i29       =         p4*2

i30       =         p4*2.74

i31       =         p4*3

i32       =         p4*3.75

i33       =         p4*4.07



; THE INSTRUMENT CONSISTS OF PAIRS Of oscil1/oscili

; WHERE OSCIL1 PROVIDES THE ENVELOPE OF THE PARTIAL

; AND OSCILI THE PARTIAL ITSELF



k1        oscil1    0,i1,i12,1

a1        oscili    k1,i23,2



k2        oscil1    0,i2,i13,1

a2        oscili    k1,i24,2



k3        oscil1    0,i3,i14,1

a3        oscili    k1,i25,2



k4        oscil1    0,i4,i15,1

a4        oscili    k1,i26,2



k5        oscil1    0,i5,i16,1

a5        oscili    k1,i27,2



k6        oscil1    0,i6,i17,1

a6        oscili    k1,i28,2



k7        oscil1    0,i7,i18,1

a7        oscili    k1,i29,2



k8        oscil1    0,i8,i19,1

a8        oscili    k1,i30,2



k9        oscil1    0,i9,i20,1

a9        oscili    k1,i31,2



k10       oscil1    0,i10,i21,1

a10       oscili    k1,i32,2



k11       oscil1    0,i11,i22,1

a11       oscili    k1,i33,2



          out       a1+a2+a3+a4+a5+a6+a7+a8+a9+a10+a11



          endin

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Thank you very much Iain. It plays very nicely.

On another note, it's great to have someone like you that invests so much
work in creating real-time instruments.
Sometimes, going through collection of Csound instruments, real-time time
instruments tend to be rare, as if no one was really interested in them.


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Thanks for posting this code. I'm going to have to play with it a little.
Mapping MIDI velocity to timbre would be useful, as would a release segment
for the envelopes, so the bell sounds as if it's being muted by hand.

--Jim Aikin

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