
			#include "ladspa-util.h"

			int refcount;
			LADSPA_Data *sin_tbl, *tri_tbl, *saw_tbl, *squ_tbl;
			long sample_rate;

Ringmod with two inputs

This is a simple 2 input ring modulator.

It is important that the modulator input is bounded to (-1, +1), otherwise you will get rubbish on the output.

unsigned long pos; float tmpa = depth * 0.5f; float tmpb = 2.0f - depth; for (pos = 0; pos < sample_count; pos++) { buffer_write(output[pos], input[pos] * (tmpa * modulator[pos] + tmpb)); } Modulation depth (0=none, 1=AM, 2=RM) Input

This is the audio input.

Modulator

This is the modulator input.

Output Ringmod with LFO

This is a simple ring modulator and LFO.

long i; sample_rate = s_rate; if (refcount++ == 0) { sin_tbl = malloc(sizeof(LADSPA_Data) * sample_rate); for (i = 0; i < sample_rate; i++) { sin_tbl[i] = sin(i * 2 * M_PI / sample_rate); } tri_tbl = malloc(sizeof(LADSPA_Data) * sample_rate); for (i = 0; i < sample_rate; i++) { tri_tbl[i] = acos(cos(i * 2 * M_PI / sample_rate)) / M_PI * 2 - 1; } squ_tbl = malloc(sizeof(LADSPA_Data) * sample_rate); for (i = 0; i < sample_rate; i++) { squ_tbl[i] = (i < sample_rate/2) ? 1 : -1; } saw_tbl = malloc(sizeof(LADSPA_Data) * sample_rate); for (i = 0; i < sample_rate; i++) { saw_tbl[i] = ((2.0 * i) - (float)sample_rate) / (float)sample_rate; } } offset = 0; offset = 0; plugin_data = plugin_data; if (--refcount == 0) { free(sin_tbl); free(tri_tbl); free(squ_tbl); free(saw_tbl); } LADSPA_Data scale = fabs(sin) + fabs(tri) + fabs(saw) + fabs(squ); int o; unsigned long pos; // Rescale to more useful value const float depth = depthp * 0.5f; if (scale == 0.0) { scale = 1.0; } for (pos = 0; pos < sample_count; pos++) { o = f_round(offset); buffer_write(output[pos], input[pos] * (depth * (((sin / scale) * sin_tbl[o]) + ((tri / scale) * tri_tbl[o]) + ((saw / scale) * saw_tbl[o]) + ((squ / scale) * squ_tbl[o])) + (1.0f - depth))); offset += freq; if (offset > sample_rate) { offset -= sample_rate; } } plugin_data->offset = offset; Modulation depth (0=none, 1=AM, 2=RM) Frequency (Hz) Sine level Triangle level Sawtooth level Square level Input Output