pd3v / counters-with-instruments-and-tremolo-effect

iOS 9 Universal app with the purpose of experimenting audio dsp programming ideas. Fills the screen up with a resettable number of counters. Counters' speeds are changeable while counting is running. Each Counter has a simple built-in synth oscillator. All Counters' sounds are chained with a reverb and custom-made tremolo effect.

Counters with Instruments and Tremolo audio effect

This repo is based on Counters with Instruments branch + Tremolo audio effect!

This is a "custom-made" effect subclassing AUAudioUnit. The Tremolo effect algorithm runs is in the function "process" inside TremoloDSPKernel class.

⚡️⚡️ Shake the device to randomly change Tremolo rate frequency! ⚡️⚡️🎶

Counter with Instruments has a built-in SimpleSynth playing one note. The notes are randomly generated out of C, E, G notes (C Major chord) in various octaves. Slowing down counters' counting increases reverb wet/dry parameter. All programmed using AVAudioEngine, AVAudioPlayerNode classes, with code generated soundwaves into AVAudioPCMBuffer buffers, plus AVAudioMixerNode and AVAudioUnitReverb.

App's initial screen (added reverb wet/dry info)

Changing Tremolo effect rate frequency

3x3 counters screen with speed changing indicator and sound playing with 40% of reverb