New opcodes:

Modified Opcodes and Gens:

Bug fixes and improvements:

System Changes:

Platform Specific:

New opcodes:

Orchestra:

Modified Opcodes and Gens:

Utilities:

Bugs Fixed:

System Changes:

API:

External Plugin Code:

New opcodes:

New gen:

Orchestra:

Score:

Options:

Modified Opcodes and Gens:

General Usage:

Bug fixed:

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Platform Specific:

New opcodes:

Orchestra:

Score:

Options:

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Utilities:

General Usage:

Bugs Fixed:

System Changes:

API:

Platform Specific:

New Opcodes:

Orchestra:

Options:

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Utilities:

Frontends:

General Usage:

Bugs Fixed:

System Changes:

API:

Platform Specific:

New opcodes:

Orchestra:

Score:

Options:

Modified Opcodes and Gens:

Utilities:

General Usage:

Bugs Fixed:

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API:

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Score:

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Utilities:

Bugs Fixed:

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API:

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Score:

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Utilities:

Frontends:

Bugs Fixed:

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Translations:

API:

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New Gen and Macros:

Orchestra:

Score:

Options:

Modified Opcodes and Gens:

Frontends:

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System Changes:

Translations:

API:

Platform Specific:

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Score:

Options:

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Utilities:

Frontends:

Bugs Fixed:

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API:

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New opcodes:

New Gen and Macros:

Orchestra:

Score:

Options:

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Utilities:

Frontends:

General Usage:

Bugs Fixed:

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API:

Platform Specific:

New opcodes:

Orchestra:

Score:

Options:

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Frontends:

General usage:

Bugs fixed:

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Utilities:

Frontends:

General usage:

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Opcodes :

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Score:

Options:

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Frontends:

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Internal Changes:

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csound~:

Emscripten:

General usage:

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API:

The performance engine now includes debugging capabilities to allow interrupting rendering and providing introspection into the engine's state and instrument variables. The following new functions are available by including the csdebug.h header:

void csoundDebuggerInit (CSOUND *csound);
void csoundDebuggerClean (CSOUND *csound);
void csoundSetInstrumentBreakpoint (CSOUND *csound, MYFLT instr, int skip);
void csoundRemoveInstrumentBreakpoint (CSOUND *csound, MYFLT instr);
void csoundClearBreakpoints (CSOUND *csound);
void csoundSetBreakpointCallback (CSOUND *csound, breakpoint_cb_t bkpt_cb, void *userdata);
void csoundDebugContinue (CSOUND *csound);
void csoundDebugStop (CSOUND *csound);
debug_instr_t *csoundDebugGetInstrInstances(CSOUND *csound);
void csoundDebugFreeInstrInstances(CSOUND *csound, debug_instr_t *instr);
debug_variable_t *csoundDebugGetVariables(CSOUND *csound, debug_instr_t *instr);
void csoundDebugFreeVariables(CSOUND *csound, debug_variable_t *varHead);

Windows:

New opcodes:

Orchestra:

Score:

Modified Opcodes and Gens:

Frontends:

Bugs fixed:

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Internal changes:

iOS:

OSX:

New opcodes:

Orchestra

Score:

Modified Opcodes and Gens:

Utilities

Frontends

Bugs fixed:

System Changes:

Platform Changes:

API:

New API functions...

API has been made threadsafe so that performance and control can occur in separate threads (after a call to csoundStart() or csoundCompile()). Threadsafety is ensure by

Internal:

New internal functions in Csound

    void (*FlushCircularBuffer)(CSOUND *, void *);
    void *(*FileOpenAsync)(CSOUND *, void *, int, const char *, void *,
                           const char *, int, int, int);
    unsigned int (*ReadAsync)(CSOUND *, void *, MYFLT *, int);
    unsigned int (*WriteAsync)(CSOUND *, void *, MYFLT *, int);
    int  (*FSeekAsync)(CSOUND *, void *, int, int);
    char *(*GetString)(CSOUND *, MYFLT);
             Extract a string originating from a score-event argument.

Functions removed

    void *(*FileOpen)(CSOUND *, void*, int, const char*, void*, const char*);

The "private" parts of the API have been changed considerably. Also structures like EVTBLK have changed.

The LINKAGE1/FLINKAGE1 macros are renamed as LINKAGE_BUILTIN/FLINKAGE_BUILTIN.

Template for a-rate perf-pass opcodes is

int perf_myopcode(CSOUND *csound, MYOPCODE *p)
{
    uint32_t offset = p->h.insdshead->ksmps_offset;
    uint32_t early  = p->h.insdshead->ksmps_no_end;
    uint32_t nsmps = CS_KSMPS;
    ...
    if (UNLIKELY(offset)) memset(p->res, '\0', offset*sizeof(MYFLT));
    if (UNLIKELY(early))  {
      nsmps -= early;
      memset(&p->res[nsmps], '\0', early*sizeof(MYFLT));
    }
    for (n=offset; n<nsmps; n++) {
        .....
        p->res[n] = ....
    }
    return OK;
}

String variables re-implemented

OENTRY structure has changed and has a new dependency field; please use this field as it is required for multicore semantics. You could set it to -1 and disallow all parallelism, but at least it is safe.

All opcodes that touch audio should take note of sample-accurate code.

A number of previous API functions are removed; OpenFile and OpenFile2 both replaced by new OpenFile2 with additional argument.

Additions have been made for arg type specifications for opcodes.

New Type System

A new type system has been added to Csound6, and significant changes have been made to the compiler. The previous system for handling types involved depending on the first-letter of a variable's name every time it was used to determine type. This meant there was a lot of re-checking of types. Also, adding new types was difficult, as there was a lot of custom code that had to be updated to check for new type letters.

In Csound6, a separate system of types was added. Types are defined as CS_TYPE's. The creation of variables from types and the initialisation of memory has been encapsulated within the CS_TYPE's. This change allows easier addition of new types, as well as generic calculations of memory pools, amongst other things.

The compiler has been modified since Csound5 to now use the type system as an integral part of its semantic checking phase. Variables are now registered into a CS_VAR_POOL when they are first defined, with the CS_VARIABLE having a reference to its CS_TYPE. After first time definition within the pool, the type information is then looked up in consequent variable lookups, rather than re-calculated from the variable name. This opens up possibilities for new variable naming and typing strategies, i.e. using "myVar:K" to denote a k-rate arg. This also opens up possibilities for user-defined types, such as "data myType kval, aval", then using "myVar:myType" to define a var of that type. (The previous is speculative, and is not an active proposal at this time.)

The addition of the type system has formalised the static type system that has existed in Csound prior to Csound6. It has, arguably, simplified the code-base in terms of type handling, as well as laid the ground work for future type-related research to be integrated into Csound.

New opcodes:

New Gen and Macros:

Orchestra:

Modified Opcodes and GENs:

Bug fixed:

System Changes:

Platform Changes:

API:

New opcodes:

New functionality

Bug fixes and improvements:

Internal Changes:

New opcodes:

Modified Opcodes and Gens:

Utilities:

Bug fixes:

System Changes:

Internal Changes:

New opcodes:

Modified Opcodes and Gens:

Utilities:

Frontends:

Bug fixes and improvements:

System Changes:

Internal Changes:

New opcodes:

New Gen and Macros

Modified Opcodes and Gens

Bugs fixed:

System Changes:

Internal Changes:

New opcodes:

New functionality

Bug fixes and improvements:

Internal Changes:

New opcodes:

New functionality

Bug fixes and improvements:

Internal Changes:

New opcodes:

Bug fixes and improvements:

Internal Changes:

New opcodes:

New functionality

Bug fixes and improvements:

Internal Changes:

New functionality

Bug fixes and improvements:

Internal Changes:

New opcodes:

New functionality:

Bug fixes and improvements:

Internal Changes:

New opcodes:

New functionality

Bug fixes and improvements:

Internal Changes:

New opcodes:

New functionality

Bug fixes and improvements:

Internal Changes:

New granular opcodes: partikkel, partikkelsync and diskgrain.

New opcode for event dispatch: scoreline.

Many new opcodes from Gabriel Maldonado's CsoundAV: hvs1, hvs2, hvs3, vphaseseg, inrg, outrg, lposcila, lposcilsa, lposcilsa2, tabmorph, tabmorpha, tabmorphi, tabmorphak, trandom, vtable1k, slider8table, slider16table, slider32table, slider64table, slider8tablef, slider16tablef, slider32tablef, slider64tablef, sliderKawai and the a-rate version of ctrl7.

Also from CsoundAV, many new FLTK widget opcodes: FLkeyIn, FLslidBnk2, FLvslidBnk, FLvslidBnk2, FLmouse, FLxyin, FLhvsBox, FLslidBnkSet, FLslidBnkSetk, FLslidBnk2Set, FLslidBnk2Setk, FLslidBnkGetHandle,

New pvs opcodes: pvsdiskin, pvsmorph,

eqfil

New command line options (--m-warnings)to control messages

csladspa: a CSD to LADSPA plugin kit.

And many bug fixes including (but not limited to): fixed k-rate version of system; fixed scaling problems of vrandh and vrandi; fixed ocasional failure of turnoff; fixed OS X bug; fixed ATScross and fixed mod.

Csound5GUI now works properly on all platforms and csoundapi~ (pd object) has been updated.