Creates a new
SynthDef with a given name and a thunk parameter that
creates the expanded UGen graph structure.
The default directory for writing synth defs is the
temporary directory given by the system property
SynthDef file name extension (without leading period).
Reads all synth-definitions contained in a file with standard binary format.
Writes a sequence of synth-definitions to a file specified by its
path to the file that will be (over)written by this method
sequences of synth-definitions to write
format version which must be 1 or 2. The default is format 1 which is more compact. Format 2 allows larger synth-defs but is basically an overkill, unless you want to build a definition with more than 65536 UGens.