| 39 | |
| 40 | template<int channels=8> |
| 41 | struct MultiChannelFeedback { |
| 42 | using Array = std::array<double, channels>; |
| 43 | |
| 44 | double delayMs = 150; |
| 45 | double decayGain = 0.85; |
| 46 | |
| 47 | std::array<int, channels> delaySamples; |
| 48 | std::array<Delay, channels> delays; |
| 49 | |
| 50 | void configure(double sampleRate) { |
| 51 | double delaySamplesBase = delayMs*0.001*sampleRate; |
| 52 | for (int c = 0; c < channels; ++c) { |
| 53 | // Distribute delay times exponentially between delayMs and 2*delayMs |
| 54 | double r = c*1.0/channels; |
| 55 | delaySamples[c] = std::pow(2, r)*delaySamplesBase; |
| 56 | |
| 57 | delays[c].resize(delaySamples[c] + 1); |
| 58 | delays[c].reset(); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | Array process(Array input) { |
| 63 | Array delayed; |
| 64 | for (int c = 0; c < channels; ++c) { |
| 65 | delayed[c] = delays[c].read(delaySamples[c]); |
| 66 | } |
| 67 | |
| 68 | for (int c = 0; c < channels; ++c) { |
| 69 | double sum = input[c] + delayed[c]*decayGain; |
| 70 | delays[c].write(sum); |
| 71 | } |
| 72 | |
| 73 | return delayed; |
| 74 | } |
| 75 | }; |
| 76 | |
| 77 | template<int channels=8> |
| 78 | struct MultiChannelMixedFeedback { |
nothing calls this directly
no outgoing calls
no test coverage detected