Post by dizzeesatchel on Mar 11, 2023 23:30:40 GMT
The excellent DIY work of HAGIWO came up in another thread and specifically his self-built FM module based on arduino.
I was thinking to myself "that would be nice to build" but reading through his page about it i realised it was built with the Mozzi library. So bringing it to Grains should be trivial, and it was!
Just required changing some of the knob and input allocations to account for the different pinout used by Grains.
Controls:
In 1: modulator frequency (can be attenuated with pot 1)
In 2: modulator level (can be attenuated with pot 2)
In 3: v/oct input
Pot 3: carrier frequency
Sounds decent! Will scour his other builds for things to translate.
#include <MozziGuts.h>
#include <Oscil.h>
#include <tables/cos2048_int8.h> // table for Oscils to play
#include <mozzi_fixmath.h>
#define CONTROL_RATE 256 // Hz, powers of 2 are most reliable
Oscil<COS2048_NUM_CELLS, AUDIO_RATE> aCarrier(COS2048_DATA);
Oscil<COS2048_NUM_CELLS, AUDIO_RATE> aModulator(COS2048_DATA);
Oscil<COS2048_NUM_CELLS, CONTROL_RATE> kModIndex(COS2048_DATA);
int voct = 500;
const static float voctpow[1024] PROGMEM = {
0, 0.004882, 0.009765, 0.014648, 0.019531, 0.024414, 0.029296, 0.034179, 0.039062, 0.043945, 0.048828, 0.05371, 0.058593, 0.063476, 0.068359, 0.073242, 0.078125, 0.083007, 0.08789, 0.092773, 0.097656, 0.102539, 0.107421, 0.112304, 0.117187, 0.12207, 0.126953, 0.131835, 0.136718, 0.141601, 0.146484, 0.151367, 0.15625, 0.161132, 0.166015, 0.170898, 0.175781, 0.180664, 0.185546, 0.190429, 0.195312, 0.200195, 0.205078, 0.20996, 0.214843, 0.219726, 0.224609, 0.229492, 0.234375, 0.239257, 0.24414, 0.249023, 0.253906, 0.258789, 0.263671, 0.268554, 0.273437, 0.27832, 0.283203, 0.288085, 0.292968, 0.297851, 0.302734, 0.307617, 0.3125, 0.317382, 0.322265, 0.327148, 0.332031, 0.336914, 0.341796, 0.346679, 0.351562, 0.356445, 0.361328, 0.36621, 0.371093, 0.375976, 0.380859, 0.385742, 0.390625, 0.395507, 0.40039, 0.405273, 0.410156, 0.415039, 0.419921, 0.424804, 0.429687, 0.43457, 0.439453, 0.444335, 0.449218, 0.454101, 0.458984, 0.463867, 0.46875, 0.473632, 0.478515, 0.483398, 0.488281, 0.493164, 0.498046, 0.502929, 0.507812, 0.512695, 0.517578, 0.52246, 0.527343, 0.532226, 0.537109, 0.541992, 0.546875, 0.551757, 0.55664, 0.561523, 0.566406, 0.571289, 0.576171, 0.581054, 0.585937, 0.59082, 0.595703, 0.600585, 0.605468, 0.610351, 0.615234, 0.620117, 0.625, 0.629882, 0.634765, 0.639648, 0.644531, 0.649414, 0.654296, 0.659179, 0.664062, 0.668945, 0.673828, 0.67871, 0.683593, 0.688476, 0.693359, 0.698242, 0.703125, 0.708007, 0.71289, 0.717773, 0.722656, 0.727539, 0.732421, 0.737304, 0.742187, 0.74707, 0.751953, 0.756835, 0.761718, 0.766601, 0.771484, 0.776367, 0.78125, 0.786132, 0.791015, 0.795898, 0.800781, 0.805664, 0.810546, 0.815429, 0.820312, 0.825195, 0.830078, 0.83496, 0.839843, 0.844726, 0.849609, 0.854492, 0.859375, 0.864257, 0.86914, 0.874023, 0.878906, 0.883789, 0.888671, 0.893554, 0.898437, 0.90332, 0.908203, 0.913085, 0.917968, 0.922851, 0.927734, 0.932617, 0.9375, 0.942382, 0.947265, 0.952148, 0.957031, 0.961914, 0.966796, 0.971679, 0.976562, 0.981445, 0.986328, 0.99121, 0.996093, 1.000976, 1.005859, 1.010742, 1.015625, 1.020507, 1.02539, 1.030273, 1.035156, 1.040039, 1.044921, 1.049804, 1.054687, 1.05957, 1.064453, 1.069335, 1.074218, 1.079101, 1.083984, 1.088867, 1.09375, 1.098632, 1.103515, 1.108398, 1.113281, 1.118164, 1.123046, 1.127929, 1.132812, 1.137695, 1.142578, 1.14746, 1.152343, 1.157226, 1.162109, 1.166992, 1.171875, 1.176757, 1.18164, 1.186523, 1.191406, 1.196289, 1.201171, 1.206054, 1.210937, 1.21582, 1.220703, 1.225585, 1.230468, 1.235351, 1.240234, 1.245117, 1.25, 1.254882, 1.259765, 1.264648, 1.269531, 1.274414, 1.279296, 1.284179, 1.289062, 1.293945, 1.298828, 1.30371, 1.308593, 1.313476, 1.318359, 1.323242, 1.328125, 1.333007, 1.33789, 1.342773, 1.347656, 1.352539, 1.357421, 1.362304, 1.367187, 1.37207, 1.376953, 1.381835, 1.386718, 1.391601, 1.396484, 1.401367, 1.40625, 1.411132, 1.416015, 1.420898, 1.425781, 1.430664, 1.435546, 1.440429, 1.445312, 1.450195, 1.455078, 1.45996, 1.464843, 1.469726, 1.474609, 1.479492, 1.484375, 1.489257, 1.49414, 1.499023, 1.503906, 1.508789, 1.513671, 1.518554, 1.523437, 1.52832, 1.533203, 1.538085, 1.542968, 1.547851, 1.552734, 1.557617, 1.5625, 1.567382, 1.572265, 1.577148, 1.582031, 1.586914, 1.591796, 1.596679, 1.601562, 1.606445, 1.611328, 1.61621, 1.621093, 1.625976, 1.630859, 1.635742, 1.640625, 1.645507, 1.65039, 1.655273, 1.660156, 1.665039, 1.669921, 1.674804, 1.679687, 1.68457, 1.689453, 1.694335, 1.699218, 1.704101, 1.708984, 1.713867, 1.71875, 1.723632, 1.728515, 1.733398, 1.738281, 1.743164, 1.748046, 1.752929, 1.757812, 1.762695, 1.767578, 1.77246, 1.777343, 1.782226, 1.787109, 1.791992, 1.796875, 1.801757, 1.80664, 1.811523, 1.816406, 1.821289, 1.826171, 1.831054, 1.835937, 1.84082, 1.845703, 1.850585, 1.855468, 1.860351, 1.865234, 1.870117, 1.875, 1.879882, 1.884765, 1.889648, 1.894531, 1.899414, 1.904296, 1.909179, 1.914062, 1.918945, 1.923828, 1.92871, 1.933593, 1.938476, 1.943359, 1.948242, 1.953125, 1.958007, 1.96289, 1.967773, 1.972656, 1.977539, 1.982421, 1.987304, 1.992187, 1.99707, 2.001953, 2.006835, 2.011718, 2.016601, 2.021484, 2.026367, 2.03125, 2.036132, 2.041015, 2.045898, 2.050781, 2.055664, 2.060546, 2.065429, 2.070312, 2.075195, 2.080078, 2.08496, 2.089843, 2.094726, 2.099609, 2.104492, 2.109375, 2.114257, 2.11914, 2.124023, 2.128906, 2.133789, 2.138671, 2.143554, 2.148437, 2.15332, 2.158203, 2.163085, 2.167968, 2.172851, 2.177734, 2.182617, 2.1875, 2.192382, 2.197265, 2.202148, 2.207031, 2.211914, 2.216796, 2.221679, 2.226562, 2.231445, 2.236328, 2.24121, 2.246093, 2.250976, 2.255859, 2.260742, 2.265625, 2.270507, 2.27539, 2.280273, 2.285156, 2.290039, 2.294921, 2.299804, 2.304687, 2.30957, 2.314453, 2.319335, 2.324218, 2.329101, 2.333984, 2.338867, 2.34375, 2.348632, 2.353515, 2.358398, 2.363281, 2.368164, 2.373046, 2.377929, 2.382812, 2.387695, 2.392578, 2.39746, 2.402343, 2.407226, 2.412109, 2.416992, 2.421875, 2.426757, 2.43164, 2.436523, 2.441406, 2.446289, 2.451171, 2.456054, 2.460937, 2.46582, 2.470703, 2.475585, 2.480468, 2.485351, 2.490234, 2.495117, 2.5, 2.504882, 2.509765, 2.514648, 2.519531, 2.524414, 2.529296, 2.534179, 2.539062, 2.543945, 2.548828, 2.55371, 2.558593, 2.563476, 2.568359, 2.573242, 2.578125, 2.583007, 2.58789, 2.592773, 2.597656, 2.602539, 2.607421, 2.612304, 2.617187, 2.62207, 2.626953, 2.631835, 2.636718, 2.641601, 2.646484, 2.651367, 2.65625, 2.661132, 2.666015, 2.670898, 2.675781, 2.680664, 2.685546, 2.690429, 2.695312, 2.700195, 2.705078, 2.70996, 2.714843, 2.719726, 2.724609, 2.729492, 2.734375, 2.739257, 2.74414, 2.749023, 2.753906, 2.758789, 2.763671, 2.768554, 2.773437, 2.77832, 2.783203, 2.788085, 2.792968, 2.797851, 2.802734, 2.807617, 2.8125, 2.817382, 2.822265, 2.827148, 2.832031, 2.836914, 2.841796, 2.846679, 2.851562, 2.856445, 2.861328, 2.86621, 2.871093, 2.875976, 2.880859, 2.885742, 2.890625, 2.895507, 2.90039, 2.905273, 2.910156, 2.915039, 2.919921, 2.924804, 2.929687, 2.93457, 2.939453, 2.944335, 2.949218, 2.954101, 2.958984, 2.963867, 2.96875, 2.973632, 2.978515, 2.983398, 2.988281, 2.993164, 2.998046, 3.002929, 3.007812, 3.012695, 3.017578, 3.02246, 3.027343, 3.032226, 3.037109, 3.041992, 3.046875, 3.051757, 3.05664, 3.061523, 3.066406, 3.071289, 3.076171, 3.081054, 3.085937, 3.09082, 3.095703, 3.100585, 3.105468, 3.110351, 3.115234, 3.120117, 3.125, 3.129882, 3.134765, 3.139648, 3.144531, 3.149414, 3.154296, 3.159179, 3.164062, 3.168945, 3.173828, 3.17871, 3.183593, 3.188476, 3.193359, 3.198242, 3.203125, 3.208007, 3.21289, 3.217773, 3.222656, 3.227539, 3.232421, 3.237304, 3.242187, 3.24707, 3.251953, 3.256835, 3.261718, 3.266601, 3.271484, 3.276367, 3.28125, 3.286132, 3.291015, 3.295898, 3.300781, 3.305664, 3.310546, 3.315429, 3.320312, 3.325195, 3.330078, 3.33496, 3.339843, 3.344726, 3.349609, 3.354492, 3.359375, 3.364257, 3.36914, 3.374023, 3.378906, 3.383789, 3.388671, 3.393554, 3.398437, 3.40332, 3.408203, 3.413085, 3.417968, 3.422851, 3.427734, 3.432617, 3.4375, 3.442382, 3.447265, 3.452148, 3.457031, 3.461914, 3.466796, 3.471679, 3.476562, 3.481445, 3.486328, 3.49121, 3.496093, 3.500976, 3.505859, 3.510742, 3.515625, 3.520507, 3.52539, 3.530273, 3.535156, 3.540039, 3.544921, 3.549804, 3.554687, 3.55957, 3.564453, 3.569335, 3.574218, 3.579101, 3.583984, 3.588867, 3.59375, 3.598632, 3.603515, 3.608398, 3.613281, 3.618164, 3.623046, 3.627929, 3.632812, 3.637695, 3.642578, 3.64746, 3.652343, 3.657226, 3.662109, 3.666992, 3.671875, 3.676757, 3.68164, 3.686523, 3.691406, 3.696289, 3.701171, 3.706054, 3.710937, 3.71582, 3.720703, 3.725585, 3.730468, 3.735351, 3.740234, 3.745117, 3.75, 3.754882, 3.759765, 3.764648, 3.769531, 3.774414, 3.779296, 3.784179, 3.789062, 3.793945, 3.798828, 3.80371, 3.808593, 3.813476, 3.818359, 3.823242, 3.828125, 3.833007, 3.83789, 3.842773, 3.847656, 3.852539, 3.857421, 3.862304, 3.867187, 3.87207, 3.876953, 3.881835, 3.886718, 3.891601, 3.896484, 3.901367, 3.90625, 3.911132, 3.916015, 3.920898, 3.925781, 3.930664, 3.935546, 3.940429, 3.945312, 3.950195, 3.955078, 3.95996, 3.964843, 3.969726, 3.974609, 3.979492, 3.984375, 3.989257, 3.99414, 3.999023, 4.003906, 4.008789, 4.013671, 4.018554, 4.023437, 4.02832, 4.033203, 4.038085, 4.042968, 4.047851, 4.052734, 4.057617, 4.0625, 4.067382, 4.072265, 4.077148, 4.082031, 4.086914, 4.091796, 4.096679, 4.101562, 4.106445, 4.111328, 4.11621, 4.121093, 4.125976, 4.130859, 4.135742, 4.140625, 4.145507, 4.15039, 4.155273, 4.160156, 4.165039, 4.169921, 4.174804, 4.179687, 4.18457, 4.189453, 4.194335, 4.199218, 4.204101, 4.208984, 4.213867, 4.21875, 4.223632, 4.228515, 4.233398, 4.238281, 4.243164, 4.248046, 4.252929, 4.257812, 4.262695, 4.267578, 4.27246, 4.277343, 4.282226, 4.287109, 4.291992, 4.296875, 4.301757, 4.30664, 4.311523, 4.316406, 4.321289, 4.326171, 4.331054, 4.335937, 4.34082, 4.345703, 4.350585, 4.355468, 4.360351, 4.365234, 4.370117, 4.375, 4.379882, 4.384765, 4.389648, 4.394531, 4.399414, 4.404296, 4.409179, 4.414062, 4.418945, 4.423828, 4.42871, 4.433593, 4.438476, 4.443359, 4.448242, 4.453125, 4.458007, 4.46289, 4.467773, 4.472656, 4.477539, 4.482421, 4.487304, 4.492187, 4.49707, 4.501953, 4.506835, 4.511718, 4.516601, 4.521484, 4.526367, 4.53125, 4.536132, 4.541015, 4.545898, 4.550781, 4.555664, 4.560546, 4.565429, 4.570312, 4.575195, 4.580078, 4.58496, 4.589843, 4.594726, 4.599609, 4.604492, 4.609375, 4.614257, 4.61914, 4.624023, 4.628906, 4.633789, 4.638671, 4.643554, 4.648437, 4.65332, 4.658203, 4.663085, 4.667968, 4.672851, 4.677734, 4.682617, 4.6875, 4.692382, 4.697265, 4.702148, 4.707031, 4.711914, 4.716796, 4.721679, 4.726562, 4.731445, 4.736328, 4.74121, 4.746093, 4.750976, 4.755859, 4.760742, 4.765625, 4.770507, 4.77539, 4.780273, 4.785156, 4.790039, 4.794921, 4.799804, 4.804687, 4.80957, 4.814453, 4.819335, 4.824218, 4.829101, 4.833984, 4.838867, 4.84375, 4.848632, 4.853515, 4.858398, 4.863281, 4.868164, 4.873046, 4.877929, 4.882812, 4.887695, 4.892578, 4.89746, 4.902343, 4.907226, 4.912109, 4.916992, 4.921875, 4.926757, 4.93164, 4.936523, 4.941406, 4.946289, 4.951171, 4.956054, 4.960937, 4.96582, 4.970703, 4.975585, 4.980468, 4.985351, 4.990234, 4.995117
};
Q16n16 deviation;
Q16n16 carrier_freq, mod_freq, knob_freq;
void setup() {
startMozzi(CONTROL_RATE);
}
void setFreqs(Q16n16 freq) {
carrier_freq = freq ; // V/oct apply
mod_freq = ((carrier_freq >> 8) * (mozziAnalogRead(2)));
deviation = ((mod_freq >> 16) * (1 + mozziAnalogRead(1))); // (Q16n16>>16) Q8n8 = Q24n8, beware of overflow
aCarrier.setFreq_Q16n16(carrier_freq);
aModulator.setFreq_Q16n16(mod_freq);
}
void updateControl() {
voct = mozziAnalogRead(3);
knob_freq = mozziAnalogRead(0);
setFreqs((2270658 + knob_freq * 5000) * pow(2, (pgm_read_float(&(voctpow[voct]))))) ;
}
AudioOutput_t updateAudio() {
Q15n16 modulation = deviation * aModulator.next() >> 8;
return MonoOutput::from8Bit(aCarrier.phMod(modulation)); // Internally still only 8 bits, will be shifted up to 14 bits in HIFI mode
}
void loop() {
audioHook();
}
