lpslot islot lpinterp islot1, islot2, kmix
Interpolate between two lpc analysis files.
islot – number of slot to be selected [0<islot<20]
lpslot selects the slot to be use by further lp opcodes. This is the way to load and reference several analysis at the same time.
islot1 – slot where the first analysis was stored
islot2 – slot where the second analysis was stored
kmix – mix value between the two analysis. Should be between 0 and 1. 0 means analysis 1 only. 1 means analysis 2 only. Any value in between will produce interpolation between the filters.
lpinterp computes a new set of poles from the interpolation between two analysis. The poles will be stored in the current lpslot and used by the next lpreson opcode.
Here is a typical orc using the opcodes:
ipower init 50000 ; Define sound generator ifreq init 440 asrc buzz ipower,ifreq,10,1 ktime line 0,p3,p3 ; Define time lin lpslot 0 ; Read square data poles krmsr,krmso,kerr,kcps lpread ktime,"square.pol" lpslot 1 ; Read triangle data poles krmsr,krmso,kerr,kcps lpread ktime,"triangle.pol" kmix line 0,p3,1 ; Compute result of mixing lpinterp 0,1,kmix ; and balance power ares lpreson asrc aout balance ares,asrc out aout