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Midi learn #13

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Midi learn #13

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31 changes: 8 additions & 23 deletions src/components/DeviceSelector.js
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Original file line number Diff line number Diff line change
@@ -1,40 +1,25 @@
import React, { useCallback, useContext, useEffect, useState } from 'react'
import React, { useCallback, useContext } from 'react'
import styled from 'styled-components'
import { getMIDIDevices } from '../state'
import { getCurrentMIDIDevice, getMIDIDevices } from '../state'
import { SynthInstrumentContext } from './Engine'

export const DeviceSelector = () => {
const [state, dispatch] = useContext(SynthInstrumentContext)
const [devicesValues, setDevicesValues] = useState([])
const devices = getMIDIDevices(state)
const current = getCurrentMIDIDevice(state)

const onDeviceChange = useCallback(
event => {
const device = state.midi.devices.find(device => device.id.toString() === event.target.value.toString())

if (!device) {
return
}

dispatch({ type: 'midi_switch_device', device })
dispatch({ type: 'midi_switch_device', device: event.target.value })
},
[state.midi.devices, dispatch]
[dispatch]
)

useEffect(() => {
setDevicesValues(
devices
.filter(device => device.state === 'connected')
.map(device => ({ label: device.name, value: device.id }) )
)
}, [devices])

return (
<Container>
<StyledSelector onChange={ onDeviceChange }>
<option defaultValue disabled>Choose one MIDI device</option>
{devicesValues.map(deviceValue =>
<option key={ deviceValue.value } value={ deviceValue.value }>{deviceValue.label}</option>
<StyledSelector value={current} onChange={onDeviceChange} placeholder="No MIDI devices found">
{devices.map(([id, name]) =>
<option key={ id} value={id}>{name}</option>
)}
</StyledSelector>
</Container>
Expand Down
124 changes: 73 additions & 51 deletions src/components/Engine.js
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Original file line number Diff line number Diff line change
@@ -1,27 +1,28 @@
import * as Tone from 'tone'
import styled from 'styled-components'
import React, { createContext, useReducer, useEffect } from 'react'
import { FLT_FREQ_MAX, FLT_FREQ_MIN, getParams, initialState, reducer } from '../state'

let engine = {
oscillator1: null,
oscillator2: null,
filter: {
unit: null,
envelope: null,
},
volume: null,
distortion: null,
delay: null,
analyzer: null,
reverb: null,
shifter: null,
}
import React, { createContext, useReducer, useEffect, useRef } from 'react'
import { config, FLT_FREQ_MAX, FLT_FREQ_MIN } from '../config'
import { getParams, initialState, reducer } from '../state'
import { mapRangeControl } from '../utils/math'

export const SynthInstrumentContext = createContext([initialState, () => null])

export const Engine = ({ children }) => {
const [state, dispatch] = useReducer(reducer, initialState)
const engine = useRef({
oscillator1: null,
oscillator2: null,
filter: {
unit: null,
envelope: null,
},
volume: null,
distortion: null,
delay: null,
analyzer: null,
reverb: null,
shifter: null,
})
const { initialized } = state
const params = getParams(state)

Expand Down Expand Up @@ -51,7 +52,7 @@ export const Engine = ({ children }) => {

delay.chain(distortion, reverb, filter, shifter, analyzer, volume, Tone.Destination)

engine = {
engine.current = {
oscillator1,
oscillator2,
filter: {
Expand All @@ -70,15 +71,36 @@ export const Engine = ({ children }) => {
dispatch({ type: 'init_engine' })

Tone.start()
}, [])
}, [engine])

useEffect(() => {
if (!initialized) {
return
}

Object.entries(state.midi_map).forEach(([param, control]) => {
if (config[param].mappable) {
dispatch({
type: 'set_parameter',
name: param,
value: mapRangeControl(
state.cc[control] || config[param].default,
config[param].min,
config[param].max
)
})
}
})

}, [initialized, dispatch, state.cc, state.midi_map])

useEffect(() => {
if (!initialized) {
return
}

if (state.analyzer.requesting) {
dispatch({ type: 'set_analyzer', values: engine.analyzer.getValue() })
dispatch({ type: 'set_analyzer', values: engine.current.analyzer.getValue() })
}

}, [initialized, dispatch, state.analyzer])
Expand All @@ -95,19 +117,19 @@ export const Engine = ({ children }) => {
const parseFrequencies = notes => notes.map(({ note }) => Tone.Midi(note).toFrequency())

toPlays.forEach(note => {
engine.oscillator1.triggerAttack(
engine.current.oscillator1.triggerAttack(
Tone.Midi(note.note).toFrequency(), Tone.now(), note.velocity
)})

toPlays.forEach(note => engine.oscillator2.triggerAttack(
toPlays.forEach(note => engine.current.oscillator2.triggerAttack(
Tone.Midi(note.note).toFrequency(), Tone.now(), note.velocity
))

engine.filter.envelope.triggerAttack()
engine.current.filter.envelope.triggerAttack()

engine.oscillator1.triggerRelease(parseFrequencies(toRelease))
engine.oscillator2.triggerRelease(parseFrequencies(toRelease))
engine.filter.envelope.triggerRelease()
engine.current.oscillator1.triggerRelease(parseFrequencies(toRelease))
engine.current.oscillator2.triggerRelease(parseFrequencies(toRelease))
engine.current.filter.envelope.triggerRelease()

toPlays.map(({ note }) => dispatch({ type: 'note_triggered', note }))
}, [state.notes, dispatch, initialized])
Expand All @@ -118,23 +140,23 @@ export const Engine = ({ children }) => {
}

const decibels = Tone.gainToDb(params.master_vol)
engine.volume.set({ volume: decibels })
engine.current.volume.set({ volume: decibels })
}, [params.master_vol, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.oscillator1.set({
engine.current.oscillator1.set({
envelope: {
attack: params.osc1_env_atk,
decay: params.osc1_env_dec,
sustain: params.osc1_env_sus,
release: params.osc1_env_rel,
},
})
engine.oscillator2.set({
engine.current.oscillator2.set({
envelope: {
attack: params.osc2_env_atk,
decay: params.osc2_env_dec,
Expand All @@ -159,7 +181,7 @@ export const Engine = ({ children }) => {
return
}

engine.filter.envelope.set({
engine.current.filter.envelope.set({
attack: params.flt_env_atk,
decay: params.flt_env_dec,
sustain: params.flt_env_sus,
Expand All @@ -173,16 +195,16 @@ export const Engine = ({ children }) => {
return
}

engine.oscillator1.set({ oscillator: { type: params.osc1_type } })
engine.oscillator2.set({ oscillator: { type: params.osc2_type } })
engine.current.oscillator1.set({ oscillator: { type: params.osc1_type } })
engine.current.oscillator2.set({ oscillator: { type: params.osc2_type } })
}, [params.osc1_type, params.osc2_type, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.filter.unit.set({ type: params.flt_type })
engine.current.filter.unit.set({ type: params.flt_type })
}, [params.flt_type, params.flt_freq, params.flt_res, initialized])

useEffect(() => {
Expand All @@ -191,11 +213,11 @@ export const Engine = ({ children }) => {
}

if (params.flt_env_mix > 0) {
engine.filter.scale.min = params.flt_freq
engine.filter.scale.max = params.flt_freq + (FLT_FREQ_MAX - params.flt_freq) * params.flt_env_mix
engine.current.filter.scale.min = params.flt_freq
engine.current.filter.scale.max = params.flt_freq + (FLT_FREQ_MAX - params.flt_freq) * params.flt_env_mix
} else {
engine.filter.scale.min = FLT_FREQ_MIN + (params.flt_freq - FLT_FREQ_MIN) * (1 - Math.abs(params.flt_env_mix))
engine.filter.scale.max = params.flt_freq
engine.current.filter.scale.min = FLT_FREQ_MIN + (params.flt_freq - FLT_FREQ_MIN) * (1 - Math.abs(params.flt_env_mix))
engine.current.filter.scale.max = params.flt_freq
}

}, [params.flt_env_mix, params.flt_freq, initialized])
Expand All @@ -205,62 +227,62 @@ export const Engine = ({ children }) => {
return
}

engine.oscillator1.set({ oscillator: { detune: params.osc1_detune + params.osc1_pitch * 100 } })
engine.oscillator2.set({ oscillator: { detune: params.osc2_detune + params.osc2_pitch * 100 } })
engine.current.oscillator1.set({ oscillator: { detune: params.osc1_detune + params.osc1_pitch * 100 } })
engine.current.oscillator2.set({ oscillator: { detune: params.osc2_detune + params.osc2_pitch * 100 } })
}, [params.osc1_detune, params.osc1_pitch, params.osc2_detune, params.osc2_pitch, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.oscillator1.set({ oscillator: { volume: Tone.gainToDb(params.osc1_vol) } })
engine.oscillator2.set({ oscillator: { volume: Tone.gainToDb(params.osc2_vol) } })
engine.current.oscillator1.set({ oscillator: { volume: Tone.gainToDb(params.osc1_vol) } })
engine.current.oscillator2.set({ oscillator: { volume: Tone.gainToDb(params.osc2_vol) } })
}, [params.osc1_vol, params.osc2_vol, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.oscillator1.set({ oscillator: { phase: params.osc1_phase } })
engine.oscillator2.set({ oscillator: { phase: params.osc2_phase } })
engine.current.oscillator1.set({ oscillator: { phase: params.osc1_phase } })
engine.current.oscillator2.set({ oscillator: { phase: params.osc2_phase } })
}, [params.osc1_phase, params.osc2_phase, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.distortion.set({ distortion: params.dist_amt })
engine.current.distortion.set({ distortion: params.dist_amt })
}, [params.dist_amt, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.delay.set({ wet: params.delay_wet })
engine.delay.set({ delayTime: params.delay_time })
engine.delay.set({ feedback: params.delay_feed })
engine.current.delay.set({ wet: params.delay_wet })
engine.current.delay.set({ delayTime: params.delay_time })
engine.current.delay.set({ feedback: params.delay_feed })
}, [params.delay_wet, params.delay_time, params.delay_feed, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.reverb.set({ wet: params.verb_wet })
engine.reverb.set({ decay: params.verb_time })
engine.current.reverb.set({ wet: params.verb_wet })
engine.current.reverb.set({ decay: params.verb_time })
}, [params.verb_wet, params.verb_time, initialized])

useEffect(() => {
if (!initialized) {
return
}

engine.shifter.set({ wet: params.shft_wet })
engine.shifter.set({ frequency: params.shft_freq })
engine.current.shifter.set({ wet: params.shft_wet })
engine.current.shifter.set({ frequency: params.shft_freq })
}, [params.shft_wet, params.shft_freq, initialized])

return (
Expand Down
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