Analogue Oscillator
This plugin simulates the output you get from an analogue synth's osciallators.
You can get a reasonable emualtion of a 303's square (for exmaple) if you set the warmth to about 0.4 and the instability to about 0.05.
The frequency is currently a control input, and there is no interpolation, so if your host is using large block sieze it will sound steppy.
I'm unsure whether to convert this to an audio input or inpolate the control in.
tables);
blo_h_free(plugin_data->osc);
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wave = LIMIT(f_round(wave) - 1, 0, BLO_N_WAVES-1);
osc->nyquist = fs * (0.47f - f_clamp(warm, 0.0f, 1.0f) * 0.41f);
blo_hd_set_freq(osc, freq);
tables = tables; // So gcc doesn't think it's unused
for (pos = 0; pos < sample_count; pos++) {
x = blo_hd_run_cub(osc);
rnda += 432577;
rnda *= 47;
rndb += 7643113;
rnda *= 59;
osc->ph.all += (((rnda + rndb)/2) % max_jump) - max_jump/2;
osc->ph.all &= osc->ph_mask;
y = (x - q) / (1.0f - f_exp(-1.2f * (x - q))) +
q / (1.0f - f_exp(1.2f * q));
/* Catch the case where x ~= q */
if (fabs(y) > 1.0f) {
y = 0.83333f + q / (1.0f - f_exp(1.2f * q));
}
otm2 = otm1;
otm1 = leak * otm1 + y - itm1;
itm1 = y;
buffer_write(output[pos], (otm1 + otm2) * 0.5f);
}
plugin_data->itm1 = itm1;
plugin_data->otm1 = otm1;
plugin_data->otm2 = otm2;
plugin_data->rnda = rnda;
plugin_data->rndb = rndb;
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Waveform (1=sin, 2=tri, 3=squ, 4=saw)
Frequency (Hz)
The frequency of the output (Hz).
Warmth
The degree of softening that is applied to the generted waveform, reduces the number of harmonics in the output.
Instability
The degree of pitch instability of the output. Turning this too high with square and saw waves will produce an anoying jittery sound, I want to fix this but it is tricky.
Output