Routing input/output channels in Reaper

[wcr_hlo]

Hi there

If the number of channels is more than two (4x4 to make in Reaper), any example from Iplug2 Github stops working. This glitch often appears in vst3 versions of plugin alliance and waves. I mean:

Quick treatment is to reduce the number of channels forcibly. However, many plugins use 4 channels - two for signal input, two for sidechain from an external source.

By default, in the plugin settings, this is

Implementing 1 input, 2 outputs (i.e. mono -> stereo)

I don’t know if this is the reason, but I’ve found that once you build the plugin for the first time, then Logic (at least) won’t let me change the IO configuration So for example, if I build with this config: #define PLUG_CHANNEL_IO “1-1” and then change it to: #define PLUG_CHANNEL_IO “1-1 2-2” the changes will not take effect. Any other changes do work though.

There’s also this guy’s code (but it doesn’t work for me)

IPlug2 Sidechain

#define PLUG_CHANNEL_IO " 1-1 1.1-1 1.2-1 1.2-2 2.1-1 2.1-2 2-2 2.2-2" is there any way to explain this?

I suppose it doesn’t make sense to read the old iplug version.
Maybe someone has faced a similar problem and knows how to solve it. Let me know, please

[olilarkin]

Welcome!

I’m not sure I understand. IPlugSideChain and IPlugSurroundEffect VST3 are working in the latest version of Reaper for me.

[wcr_hlo]

Thank you so much for your time. It’s valuable to get an answer.

Steps to reproduce:

FX:

1FX - ReaGate by Reaper
2FX - IPluginEffect (no sound)

But it’s strange to me that such large companies can’t fix this problem.

While searching the forum, I tried it and it helped me:

Mismatch between reported channel layouts and reported numChannels

#define PLUG_CHANNEL_IO "\ 1-1 \ 1.1-1 \ 1.1-2 \ 1.1-1.1 \ 1.1-1.2 \ 1.2-1 \ 1.2-1.1 \ 1.2-1.2 \ 1.2-2 \ 1.2-2.1 \ 1.2-2.2 \ 2.1-1 \ 2.1-1.1 \ 2.1-2 \ 2.1-2.1 \ 2-2 \ 2.2-2 \ 2.2-2.1 \ 2.2-2.2" I just took and described all the possible cases of cases )___ Mono: ok Dual mono: ok Stereo: ok

Thanks for the forum!

[wcr_hlo]

After I added a compressor and specified 4 channels, the sound disappeared in the first one. How to explain this and how to make IPlugSideChain do the routing itself.