George Collins

I'm waning to create a function that can disable and enable the dsp within my external, so that it can save resources when it isn't needed without the need for deleting the object in MAX.

I thought I'd start off by trying calling dsp_free() for disabling and dsp_setup() for enabling. Whilst it does stop and start the audio processing, on disabling (dsp_free) it sends out a nasty noise (like a saw tooth wave) permanently until I call dsp_setup() again.

Is there a proper way to do this within-side an external?

Heya,

I'm waning to create a function that can disable and enable the dsp within my external, so that it can save resources when it isn't needed without the need for deleting the object in MAX.

I thought I'd start off by trying calling dsp_free() for disabling and dsp_setup() for enabling. Whilst it does stop and start the audio processing, on disabling (dsp_free) it sends out a nasty noise (like a saw tooth wave) permanently until I call dsp_setup() again.

Is there a proper way to do this within-side an external?

Cheers!

Heya,

I'm waning to create a function that can disable and enable the dsp within my external, so that it can save resources when it isn't n

dsp_free-is-it-possible-to-disable-and-enable-dsp-within-an-external

First of all, dsp_setup() and dsp_free() allocate and deallocate internal resources to allow Max to successfully include your object perform routine in the DSP chain. They are intended to be called in your "myobject_new" and "myobject_free" methods respectively. Nowhere else in your code you should be calling dsp_setup() and dsp_free().

The way you bypass audio processing in your external is very simple, maybe too simple...

sysmem_copyptr(in, out, sizeof(double) * sampleframes);

Obviously that's pseudo-code that I just wrote off the top of my head, but it should give you the idea.

The way you bypass audio processing in your external is very simple, maybe too simple...
In your perform method you write:

if (x->bypass) {
    while (sampleframes--) {
        *out++ = *in++;
    }
    /*
    or you could write also:
    sysmem_copyptr(in, out, sizeof(double) * sampleframes);
    */
}
else {
    // do your dsp here...
}

Obviously that's pseudo-code that I just wrote off the top of my head, but it should give you the idea.
Hope it helps.

Awesome, that helps a lot. Thanks Luigi! 

dsp_free() - is it possible to disable and enable DSP within an external?