crnbaker / gostringsynth Goto Github PK

Based on https://bryanftan.medium.com/accept-interfaces-return-structs-in-go-d4cab29a301b

The PortAudio callback function (mixer.output()) loops over the current voices, synthesising a sample at a time from each. If a voice is killed by the MixController() while mixer.output() is within this loop, causing the number of voices to changes, then there will be an index out of range panic, because the loop will try to synthesise a sample from a dead voice.

Add block comments preceding the package clause of one file in each package, describing the purpose of the package, as per Effective Go.

Add the ability to bow as well as pluck a string:

• New key control for toggling between bowing and plucking
• In bow mode, rather than exciting a string by settings its previous state to a 'pluck' shape, a string will be continually excited based on the stick-slip model of a bowed string.
• This will required note-on and note-off events to be handled in order to trigger the start and stop of bowing. Currently, I think only key-down events are handled. This may require a new dependency such as ebiten.
• A note-on event would trigger start of an ADSR envelope (based on the existing triangular envelopes developed for the prototype, sinusoidal sources), and a note-off event would trigger the decay.
• The envelope values would control the amplitude of the stick-slip excitation.