Luigi Castelli

I am trying to instantiate a custom audio object with 1024 signal outlets.

I am working with techniques such as Wave-Field Synthesis and High-Order Ambisonic and it is not uncommon to be in need of this many outputs.

From the Max SDK it is clear that the limit for signal inlets is set at 250 and that's fine, however for signal outlets I wasn't able to find any information.

My custom external is a straight tilde object (no GUI) compiled in X-code with the latest Max/MSP SDK. (7.1.0)

When I instantiate my object in Max 7.2.1, the object instantiates fine with 1024 signal outlets, however as soon as I turn the DSP on it unforgivingly crashes Max.

Reducing the outlets to a number around 250 fixes the crash.

Is there something I can do about this problem right now?

Any workarounds or different strategies to achieve the above?

Is this a known limitation of Max tilde objects?

I am trying to instantiate a custom audio object with 1024 signal outlets.
I am working with techniques such as Wave-Field Synthesis and High-Order Ambisonic and it is not uncommon to be in need of this many outputs.

From the Max SDK it is clear that the limit for signal inlets is set at 250 and that's fine, however for signal outlets I wasn't able to find any information.
My custom external is a straight tilde object (no GUI) compiled in X-code with the latest Max/MSP SDK. (7.1.0)
When I instantiate my object in Max 7.2.1, the object instantiates fine with 1024 signal outlets, however as soon as I turn the DSP on it unforgivingly crashes Max.
Reducing the outlets to a number around 250 fixes the crash.

Is there something I can do about this problem right now?
Any workarounds or different strategies to achieve the above?

maximum-number-of-signal-outlets-for-custom-external

For as long as I can remember this limit of 250 inlets/outlets has been in place. In z_dsp.h SYS_MAXSIGS is defined as 250.

I don't know the history behind this (it pre-dates version control!) but clearly the code assumes the 250 inlet/outlet limitation.

Off the top of my head I can imagine two approaches to work around this. One is to have multiple instances of your extern. Using a shared (global) that points to a vector/list/hash so that they can all access the inputs of the other. Perhaps one instance can set the Z_PUT_LAST or Z_PUT_FIRST flag so you know which one is in charge.

The other idea I have is to somehow use Jitter and read/write your signals into/out of matrices.

For as long as I can remember this limit of 250 inlets/outlets has been in place.  In z_dsp.h SYS_MAXSIGS is defined as 250.

Off the top of my head I can imagine two approaches to work around this.  One is to have multiple instances of your extern.  Using a shared (global) that points to a vector/list/hash so that they can all access the inputs of the other.  Perhaps one instance can set the Z_PUT_LAST or Z_PUT_FIRST flag so you know which one is in charge.

Maximum number of signal outlets for custom external