EuroSynth
Extension
ExtensionDescription
EuroSynth implements a tuning system so the Pattern system of SuperCollider can be used on a eurorack modular system.
Before starting make sure you have wired everything up properly. In this example we will use
- The audio signal of the synth is connected to input 6 (including 0!) of the audio interface
- output 4 (including 0!) of the audio interface is connected to the cvIn of the module
- output 5 (including 0!) is connected to a gate input - this is optional
Also make sure that you have started the server with the appropiated device and number of out- and inputs, see ServerOptions and EuroCollider: Configure SuperCollider
The build in monitor of EuroSynth is only mono and therefore you only may have heard something on your left speaker - this is intentional as SuperCollider is often used with an arbitrary number of output channels, therefore it should be your responsibility to map the input to your desired output. One strategy is to use Ndefs for this where we use e.g. Pan2, so e.g.
Class Methods
.new
Arguments:
| soundIn |
SoundIn bus number where the audio signal of the module is arriving. Can be |
| cvOut |
Out bus number where the cv signal should be put out. Can be |
| gateOut |
Optional Out bus number where a gate signal will be put out. If this is not provided or nil it will spawn a new private audio Bus on the server where the output will be headed to in order to not put out on output 0 of the audio interface. If you use the associated EuroSynth: -controlSynth manually you need to manually close the gate, e.g. via Function: -defer |
| playMonitor |
If true it will spawn a Ndef where the input of the module wil be played back on Bus 0 of the audio interface. This is more of a convenience method and one should write its own Ndef or SynthDef to control the output of the eurorack module. See EuroSynth: -monitor for more information. |
| negativeVoltage |
If true it will also allow to output negative voltages. Some modules are fine with this (e.g. MakeNoise STO) but others are not (e.g. Mutable Instruments Plaits), therefore it is turned off by default. |
Instance Methods
.tune
Will run the (re-)tuning procedure for the synth.
Arguments:
| baseFreq |
Reference frequency which should be considered a starting point for the tuning process. Should be a low note because we will go up the scale. |
| steps |
Number of steps which will be used for tuning. |
| endRange |
End of tuning range. 0.5 will cover around 4 octaves. |
| negativeSteps |
Allows to also tune a number of negative steps as well. This is only allowed if the EuroSynth instance was initiated with negativeVoltage set to true. |
| minMatch |
midi steps which tollerate a deviation from the baseFreq during absolute tuning. |
.freq
Will output the according DC offset on the interface so the oscillator plays the set frequency.
Arguments:
| newFreq |
.plotTuningCurve
Plots a graph how a frequency is mapped to CV according to our tuning map. The lower graph should look like a logarithmic curve and not contain any spikes.
Arguments:
| startFreq |
lower boundary |
| endFreq |
upper boundary |
.tuningMap
A Dictionary in which the internal relation between CV and frequency is stored.
.controlSynth
A synth which is used to control the output of the DC offset (aka CV) and the trigger of the EuroSynth. This will also respawn if CmdPeriod was pressed.
.resetTuning
Will reset the tuning.
.isTuned
A boolean if the synth was already tuned or not.
.freqCv
Allows to convert a frequency to a CV value. This is used internally when called a pattern is used but can be useful for manula setting of frequencies.
Arguments:
| freq |
.startControlSynth
Internal method which will start a synth which is responsible of emitting the proper DC offset to the synth and providing a gate. Normally the synth is created automatically and also revived when stopped via CmdPeriod but in case you want to respawn it manually you can do it via this method.
.monitor
.clear
Will clear and free everything associated from the server and reset the tuning. Use this before creating a new EuroSynth with the same output config but different settings, e.g. negativeVoltage.