Sitar physical model.

in RTcmix/insts/stk

quick syntax:

MSITAR(outsk, dur, AMP, FREQ, plamp[, PAN, AMPENV])

CAPITALIZED parameters are pfield-enabled for table or dynamic control (see the maketable or makeconnection scorefile commands). Parameters after the [bracket] are optional and default to 0 unless otherwise noted.

Param Field Parameter Units Dynamic Optional Notes
p0 output start time seconds no no  
p1 duration seconds no no  
p2 amplitude absolute, for 16-bit soundfiles: 0-32768 yes no  
p3 frequency Hz yes no  
p4 pluck amp 0.0-1.0 no no  
p5 pan 0-1 stereo; 0.5 is middle yes yes default: 0.5
p6 amplitude envelope reference to a pfield table-handle yes yes default: 1.0

Parameters labled as Dynamic can receive dynamic updates from a table or real-time control source.

Author: Brad Garton, based on code from the Synthesis ToolKit

MSITAR the “Sitar” physical model in Perry Cook and Gary Scavone’s STK, the Synthesis ToolKit.

Usage Notes

MSITAR models an Indian sitar. It uses a modified Karplus-Strong (“plucked string” – see the STRUM2 instrument) algorithm. Here’s what Perry says about “Sitar”:

The amplitude envelope table (p6, “AMPENV”) is an optional parameter. It is also redundant – the same functionality can be achieved by using a pfield-table reference in p2 (“AMP”).

MSITAR can produce other mono or stereo output.

Sample Scores

very basic:

   rtsetparams(44100, 1)

   amp = 17000
   MSITAR(0, 3.5, amp, cpspch(8.00), 0.9)
   MSITAR(4, 3.5, amp, cpspch(8.07), 0.9)

slightly more advanced:

   rtsetparams(44100, 2)

   MSITAR(0, 3.5, 30000, cpspch(8.00), 0.9)

   amp = maketable("line", 1000, 0,0, 1,1, 2,0)
   freq = makerandom("linear", 9.0, cpspch(8.065), cpspch(8.075))
   MSITAR(4, 3.5, amp*20000, freq, 0.9, 0.0)
   freq = makerandom("linear", 7.0, cpspch(8.065), cpspch(8.075))
   MSITAR(4, 3.5, amp*20000, freq, 0.9, 1.0)

   stramp = maketable("line", 1000, 0,1, 2,0)
   pan = makeLFO("sine", 14, 0, 1)
   MSITAR(8, 3.5, 20000, cpspch(7.07), 0.9, pan, stramp)

See Also