EQ + Compressor

[mackemint]

Hello!
I'm experimenting with the Teensyduino Audio System Design Tool and I'd like to make a simple mono effect chain.
The EQ part I figured would just be a chain of parallel filters with fixed frequencies - setting the frequency with a DC block.

However, for the compressor part I'm a little bit uncertain to how the blocks can be used.
I figured I might just multiply the incoming signal with an ADSR function, but how can I trigger the ADSR correctly?

Regards
/Macke

 

[Nantonos]

There are not currently any objects to do compression. Its possible you could construct something using peak to control multiply.

Another option would be to use the built-in audio processor on STGL5000 which does have

autoVolumeControl(maxGain, response, hardLimit, threshold, attack, decay);

You need to use

audioPreProcessorEnable();

if using the audio processor.

 

[Pensive]

The compressor works pretty well! I did find a little bug in it where it would crash into a certain mode, but by and large its great and runs on zero clockticks as well

 

[ubergrafik]

The compressor works pretty well! I did find a little bug in it where it would crash into a certain mode, but by and large its great and runs on zero clockticks as well

What was the bug? I am thinking of implementing this too. Have you go any audio examples of it in the wild?

 

[Pensive]

certain settings (detailed in bitcrusher example) crash the compressor entirely. you need to reset the board to get any more sound out correctly.

I didnt record anything at the time. I'll soon be doing a demovid of where my project is at the moment, this will include the compressor.

Its AudioPostProcessorEnable, not Pre btw.

 

[riodda]

certain settings (detailed in bitcrusher example) crash the compressor entirely. you need to reset the board to get any more sound out correctly.

I didnt record anything at the time. I'll soon be doing a demovid of where my project is at the moment, this will include the compressor.

Its AudioPostProcessorEnable, not Pre btw.

i will try to the compressor too, thanks for sharing your experience and your future findings!

 

[tenkai]

Is there anything that will allow one to use a separate audio source to trigger the compression for side-chain compression?

 

[Pensive]

Is there anything that will allow one to use a separate audio source to trigger the compression for side-chain compression?

Not that I'm aware of.

It's possible in software but we'd need to write a software compressor instead, which to my mind, is what is needed.

Also worth mentioning that by its very nature of pulling a mix down from the end of the run back to effect compression before mixdown, this would incorporate a performance hit.

There may be ways to workaround this and eliminate it in some cases.