Demiurge Sound Processing Engine

The Demiurge Sound Processing Engine is a sound processing platform. It is designed as processing blocks that are wired together once (typically at boot) and then handles the update cycle (no buffering) automatically and without jitter.

‎<syntaxhighlight lang="C" line> /*

 Copyright 2019, Awesome Audio Apparatus.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

     https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and

     limitations under the License.

• /

1. include "demiurge.h"

static control_pair_t pair1; // frequency static control_pair_t pair2; // amplitude

static control_pair_t pair3; // frequency static control_pair_t pair4; // amplitude

static audio_outport_t out1; static audio_outport_t out2; static oscillator_t oscillator1; static oscillator_t oscillator2;

/* Simple 2 VCO. SAW on output 1 and SQUARE on output 2. */

void vco_prepare() {

   demiurge_samplerate = 48000;      // 48000 samples/second
   demiurge_set_inport_cv(1);
   demiurge_set_inport_cv(2);
   demiurge_set_inport_cv(3);
   demiurge_set_inport_cv(4);

   demiurge_set_outport_audio(1);
   demiurge_set_outport_audio(2);

}

void vco_setup() {

   // Initialize the hardware configuration
   control_pair_init(&pair1, 1);     // FREQUENCY = CV+Pot at the top
   control_pair_init(&pair2, 2);     // AMPLITUDE = CV+Pot at the second position from the top
   control_pair_init(&pair3, 3);     // FREQUENCY = CV+Pot at the third position from top
   control_pair_init(&pair4, 4);     // AMPLITUDE = CV+Pot at the bottom
   audio_outport_init(&out1, 1);     // Audio Out on left output channel
   audio_outport_init(&out2, 2);     // Audio Out on right output channel

   // Initialize the oscillators
   oscillator_init(&oscillator1);
   oscillator_init(&oscillator2);

   // Set up the oscillators to SINE wave form

   oscillator_configure_mode(&oscillator1, SAW);
   oscillator_configure_mode(&oscillator2, SQUARE);

   oscillator_configure_frequency(&oscillator1, &pair1.me);
   oscillator_configure_frequency(&oscillator2, &pair3.me);

   oscillator_configure_amplitude(&oscillator1, &pair2.me);
   oscillator_configure_amplitude(&oscillator2, &pair4.me);

   // Connect Oscillator to outputs
   audio_outport_configure_input(&out1, &oscillator1.me);
   audio_outport_configure_input(&out2, &oscillator2.me);

}

void vco_loop() {

  // handle buttons and LEDs

}

1. undef TAG

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