Processing Audio using DSP in Reason
summary
Builds a native synth/drum machine that actually runs and is on GitHub and as an executable; all sounds are synthesized (no samples). Uses PortAudio with a 44100 Hz sample rate and 1024-sample buffers, implements oscillators, ADSR envelopes, a step sequencer called Reason composer 8:08, plus effects: bit crusher (downsampling + bit depth) and delay via a circular buffer. Reports a 2 MB native app size, no PortMIDI support so sequencing is internal, code folds oscillators and mixes by summing samples.
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chapters (20)
- 0:00Intro
- 1:12Sample Rate
- 2:37Buffer Size
- 3:22Port Audio
- 5:41Fill Buffer
- 6:31Waveforms
- 7:04Oscillators
- 8:19Periods
- 10:18Addition
- 11:13Envelope
- 12:41Stage Variant
- 16:25Envelopes
- 16:44Reason Sequencer
- 18:13Sequencer Code
- 19:37Bit Crusher
- 21:29Delay
- 23:50Echo
- 24:14Physical Studio Code
- 24:39Technical Breakdown
- 27:49User Interface
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