|User-Defined Opcode Database|
tap_tubewarmth - A port of Tom Szilagyi's TAP TubeWarmth LADSPA plugin to a Csound User-Defined OpcodeDownload UDO File
This is a port of Tom Szilagyi's TAP TubeWarmth LADSPA plugin to a Csound User-Defined Opcode.
From Tom Szilagyi's description:
"TAP TubeWarmth adds the character of vacuum tube amplification to your audio tracks by emulating the sonically desirable nonlinear characteristics of triodes. In addition, this plugin also supports emulating analog tape saturation."
More information about the original plugin here:
aout tap_tubewarmth ain, kdrive, kblend
ain - audio input signal
kdrive - Values between 2 and 5 are a good starting point for a variety of source materials. Since audio tracks can vary quite a bit in average and peak levels, experiment with this setting and use your ears to get the sound you want. (It's quite easy if you know how real tube amps sound like...) If the drive level is set too high, the signal will most likely sound distorted. If it's too low, you may not hear the effect working.
kblend - controls the colour of the TubeWarmth sound. When set all the way to the right (+10 or default position), the plugin emulates the sound of triode tube distortion. The result is asymmetrical, producing mostly second harmonics and some third. When set all the way to the left (-10), the plugin emulates the sound of analog tape. The result is symmetrical and produces mostly third harmonics and some second. With high drive settings, moving the blend control to the left increases the apparent loudness of low-level signals dramatically. This is because the zero-attack, zero-release compression effect is increased under these conditions. Use the blend control to set the sound of the plugin anywhere between Tape and Tube sound.
(The above descriptions of drive and blend were taken from Tom Szilagyi's Description of his plugin)
opcode tap_tubewarmth,a,akk setksmps 1 ain, kdrive, kblend xin kdrive limit kdrive, 0.1, 10 kblend limit kblend, -10, 10 kprevdrive init 0 kprevblend init 0 krdrive init 0 krbdr init 0 kkpa init 0 kkpb init 0 kkna init 0 kknb init 0 kap init 0 kan init 0 kimr init 0 kkc init 0 ksrct init 0 ksq init 0 kpwrq init 0 #define TAP_EPS # 0.000000001 # #define TAP_M(X) # $X = (($X > $TAP_EPS || $X < -$TAP_EPS) ? $X : 0) # #define TAP_D(A) # if ($A > $TAP_EPS) then $A = sqrt($A) elseif ($A < $TAP_EPS) then $A = sqrt(-$A) else $A = 0 endif # if (kprevdrive != kdrive || kprevblend != kblend) then krdrive = 12.0 / kdrive; krbdr = krdrive / (10.5 - kblend) * 780.0 / 33.0; kkpa = 2.0 * (krdrive*krdrive) - 1.0 $TAP_D(kkpa) kkpa = kkpa + 1.0; kkpb = (2.0 - kkpa) / 2.0; kap = ((krdrive*krdrive) - kkpa + 1.0) / 2.0; kkc = 2.0 * (krdrive*krdrive) - 1.0 $TAP_D(kkc) kkc = 2.0 * kkc - 2.0 * krdrive * krdrive $TAP_D(kkc) kkc = kkpa / kkc ksrct = (0.1 * sr) / (0.1 * sr + 1.0); ksq = kkc*kkc + 1.0 kknb = ksq $TAP_D(kknb) kknb = -1.0 * krbdr / kknb kkna = ksq $TAP_D(kkna) kkna = 2.0 * kkc * krbdr / kkna kan = krbdr*krbdr / ksq kimr = 2.0 * kkna + 4.0 * kan - 1.0 $TAP_D(kimr) kimr = 2.0 * kknb + kimr kpwrq = 2.0 / (kimr + 1.0) kprevdrive = kdrive kprevblend = kblend endif aprevmed init 0 amed init 0 aprevout init 0 kin downsamp ain if (kin >= 0.0) then kmed = kap + kin * (kkpa - kin) $TAP_D(kmed) amed = (kmed + kkpb) * kpwrq else kmed = kap - kin * (kkpa + kin) $TAP_D(kmed) amed = (kmed + kkpb) * kpwrq * -1 endif aout = ksrct * (amed - aprevmed + aprevout) kout downsamp aout kmed downsamp amed if (kout < -1.0) then aout = -1.0 kout = -1.0 endif $TAP_M(kout) $TAP_M(kmed) aprevmed = kmed aprevout = kout #undef TAP_D #undef TAP_M #undef TAP_EPS xout aout endop
Original LADSPA Code by Tom Szilagyi, Csound UDO code by Steven Yi (2006.08.31)