In the sources but commented out is an opcode called dashow.  This is
undocumented but seems to calculate two k-rate values.  It was written
(apparently) by Gabriel Maldonado in 2007.

Does anyone know its purpose?  Is it useful?  If so anyone willing to
document it?

==John ffitch


static int32_t dashow (CSOUND *csound, DSH *p)
{
    MYFLT range = *p->kband_max - *p->kband_min;
    if (range != FL(0.0))
      *p->rmod = (*p->kfreq_max - *p->kfreq_min) / (*p->kband_max - *p->kband_min);
    else
      *p->rmod = FL(0.0);
    *p->rcar = (*p->kfreq_max - (*p->kband_max * *p->rmod));

    if (*p->rmod <= FL(0.0)) *p->rmod = FABS (*p->rmod);
    if (*p->rcar <= FL(0.0)) *p->rcar = FABS (*p->rcar);
    return OK;

By the variable names,  I’d guess it calculates FM pair frequencies using
some rule.

Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy
Maynooth University
Ireland

> On 15 May 2018, at 18:07, John  wrote:
> 
> In the sources but commented out is an opcode called dashow.  This is
> undocumented but seems to calculate two k-rate values.  It was written
> (apparently) by Gabriel Maldonado in 2007.
> 
> Does anyone know its purpose?  Is it useful?  If so anyone willing to
> document it?
> 
> ==John ffitch
> 
> 
> static int32_t dashow (CSOUND *csound, DSH *p)
> {
>    MYFLT range = *p->kband_max - *p->kband_min;
>    if (range != FL(0.0))
>      *p->rmod = (*p->kfreq_max - *p->kfreq_min) / (*p->kband_max - *p->kband_min);
>    else
>      *p->rmod = FL(0.0);
>    *p->rcar = (*p->kfreq_max - (*p->kband_max * *p->rmod));
> 
>    if (*p->rmod <= FL(0.0)) *p->rmod = FABS (*p->rmod);
>    if (*p->rcar <= FL(0.0)) *p->rcar = FABS (*p->rcar);
>    return O