DCZX wrote:
Does anyone know of a good vocoder app or plugin?
Pieter Palmers wrote:
http://www.sirlab.de/linux/download_vocoder.html
This is a nice program, but there is some problems with it, the stand
alone application does not have support for JACK. It is desirable since
JACK makes it a lot easier to plug a soft synths as formant. The LADSPA
plugin could do this with inserted to a program (e.g AMS) but I wanted a
more flexible approach so I thought it was a good idea using it with
JACK-RACK. This is not possible because JACK-RACK assumes that every
plugin has equally many input as output ports.
I changed the LADSPA-plugin so it registers two outputports and therfore
works with JACK-RACK. Further more have I added some LADSPA_HINTS that
suggests appropriate default values, however JACK-RACK seems not to be
able to handle the controls in a proper way, but as far as I understand
is my changes valid according to LADSPA specifications and the problem
is in jack-rack.
I guess it could be done with ecasound too, but i never got the
parameters right.
Here is the a patch for this, I admit it is not a very nice way of
solving the problem but it works.
Johan
--- ../orig/vocoder-0.3/vocoder.c 2004-04-27 20:28:59.000000000 +0200
+++ ./vocoder.c 2006-07-13 12:41:00.000000000 +0200
@@ -3,6 +3,10 @@
LADSPA Unique ID: 1441
+ Version 0.4
+ Added stereo output 2006-07-12 (Johan Mattsson)
+ Added LADSPA_HINT_DEFAULT to port range hints. 2006-07-12 (Johan Mattsson)
+
Version 0.3
Added support for changing bands in real time 2003-12-09
@@ -62,11 +66,12 @@
#define PORT_FORMANT 0
#define PORT_CARRIER 1
-#define PORT_OUTPUT 2
-#define CTRL_BANDCOUNT 3
-#define CTRL_BAND1LVL 4
+#define PORT_OUTPUT_L 2
+#define PORT_OUTPUT_R 3
+#define CTRL_BANDCOUNT 4
+#define CTRL_BAND1LVL 5
-#define PORT_COUNT 4 + MAX_BANDS
+#define PORT_COUNT 5 + MAX_BANDS
/* useful macros */
@@ -88,7 +93,8 @@
LADSPA_Data * portFormant; /* Formant signal port data location */
LADSPA_Data * portCarrier; /* Carrier signal port data location */
- LADSPA_Data * portOutput; /* Output audio port data location */
+ LADSPA_Data * portOutput_L; /* Output audio port data location */
+ LADSPA_Data * portOutput_R; /* Output audio port data location */
LADSPA_Data * ctrlBandCount; /* Band count control */
LADSPA_Data * ctrlBandLevels[MAX_BANDS]; /* level controls for each band */
@@ -145,8 +151,11 @@
case PORT_CARRIER: /* carrier port? */
vocoder->portCarrier = DataLocation;
break;
- case PORT_OUTPUT: /* output port? */
- vocoder->portOutput = DataLocation;
+ case PORT_OUTPUT_L: /* output port? */
+ vocoder->portOutput_L = DataLocation;
+ break;
+ case PORT_OUTPUT_R: /* output port? */
+ vocoder->portOutput_R = DataLocation;
break;
case CTRL_BANDCOUNT: /* band count control? */
vocoder->ctrlBandCount = DataLocation;
@@ -239,7 +248,7 @@
vocoder_do_bandpasses (vocoder->bands_formant,
vocoder->portFormant[i], vocoder);
- vocoder->portOutput[i] = 0.0;
+ vocoder->portOutput_L[i] = 0.0;
for (j=0; j < numbands; j++)
{
vocoder->bands_out[j].oldval = vocoder->bands_out[j].oldval
@@ -247,9 +256,12 @@
- vocoder->bands_out[j].oldval)
* vocoder->bands_out[j].decay;
x = vocoder->bands_carrier[j].y * vocoder->bands_out[j].oldval;
- vocoder->portOutput[i] += x * vocoder->bands_out[j].level;
+ vocoder->portOutput_L[i] += x * vocoder->bands_out[j].level;
}
- vocoder->portOutput[i] *= vocoder->mainvol;
+ vocoder->portOutput_L[i] *= vocoder->mainvol;
+
+ /* we need to copy audio to right port data location */
+ vocoder->portOutput_R[i] = vocoder->portOutput_L[i];
}
}
@@ -298,7 +310,9 @@
= LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
piPortDescriptors[PORT_CARRIER]
= LADSPA_PORT_INPUT | LADSPA_PORT_AUDIO;
- piPortDescriptors[PORT_OUTPUT]
+ piPortDescriptors[PORT_OUTPUT_L]
+ = LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO;
+ piPortDescriptors[PORT_OUTPUT_R]
= LADSPA_PORT_OUTPUT | LADSPA_PORT_AUDIO;
piPortDescriptors[CTRL_BANDCOUNT]
= LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL;
@@ -307,19 +321,33 @@
g_psDescriptor->PortNames = (const char **)pcPortNames;
pcPortNames[PORT_FORMANT] = strdup("Formant");
pcPortNames[PORT_CARRIER] = strdup("Carrier");
- pcPortNames[PORT_OUTPUT] = strdup("Output");
+ pcPortNames[PORT_OUTPUT_L] = strdup("Output Left");
+ pcPortNames[PORT_OUTPUT_L] = strdup("Output Rigth");
pcPortNames[CTRL_BANDCOUNT] = strdup("Number of bands");
psPortRangeHints = ((LADSPA_PortRangeHint *)
calloc(PORT_COUNT, sizeof(LADSPA_PortRangeHint)));
g_psDescriptor->PortRangeHints
= (const LADSPA_PortRangeHint *)psPortRangeHints;
- psPortRangeHints[PORT_FORMANT].HintDescriptor = 0;
- psPortRangeHints[PORT_CARRIER].HintDescriptor = 0;
- psPortRangeHints[PORT_OUTPUT].HintDescriptor = 0;
+ psPortRangeHints[PORT_FORMANT].HintDescriptor = LADSPA_HINT_BOUNDED_BELOW
+ | LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_DEFAULT_HIGH;
+ psPortRangeHints[PORT_FORMANT].LowerBound = 0;
+ psPortRangeHints[PORT_FORMANT].UpperBound = 1;
+ psPortRangeHints[PORT_CARRIER].HintDescriptor = LADSPA_HINT_BOUNDED_BELOW
+ | LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_DEFAULT_HIGH;
+ psPortRangeHints[PORT_CARRIER].LowerBound = 0;
+ psPortRangeHints[PORT_CARRIER].UpperBound = 1;
+ psPortRangeHints[PORT_OUTPUT_L].HintDescriptor = LADSPA_HINT_BOUNDED_BELOW
+ | LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_DEFAULT_HIGH;
+ psPortRangeHints[PORT_OUTPUT_L].LowerBound = 0;
+ psPortRangeHints[PORT_OUTPUT_L].UpperBound = 1;
+ psPortRangeHints[PORT_OUTPUT_R].HintDescriptor = LADSPA_HINT_BOUNDED_BELOW
+ | LADSPA_HINT_BOUNDED_ABOVE | LADSPA_HINT_DEFAULT_HIGH;
+ psPortRangeHints[PORT_OUTPUT_R].LowerBound = 0;
+ psPortRangeHints[PORT_OUTPUT_R].UpperBound = 1;
psPortRangeHints[CTRL_BANDCOUNT].HintDescriptor
= LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE
- | LADSPA_HINT_INTEGER;
+ | LADSPA_HINT_INTEGER | LADSPA_HINT_DEFAULT_1;
psPortRangeHints[CTRL_BANDCOUNT].LowerBound = 1;
psPortRangeHints[CTRL_BANDCOUNT].UpperBound = MAX_BANDS;
@@ -329,7 +357,8 @@
pcPortNames[i] = malloc (sizeof ("Band 99 Level"));
sprintf(pcPortNames[i], "Band %d Level", i - CTRL_BAND1LVL + 1);
psPortRangeHints[i].HintDescriptor
- = LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE;
+ = LADSPA_HINT_BOUNDED_BELOW | LADSPA_HINT_BOUNDED_ABOVE
+ | LADSPA_HINT_DEFAULT_HIGH;
psPortRangeHints[i].LowerBound = 0;
psPortRangeHints[i].UpperBound = 1;
}
