Editting Filters in RealTime

edited June 2016

Hi Guys,

I've been setting up some basic filters and trying to modify their parameters in realtime. something really simple like so

AELowPassFilter *lowPass = [[AELowPassFilter alloc] init];
[controller addFilter:filter toChannelGroup:group];

and in a UISlider callback I set the value, but nothing changes.

- (IBAction)harmonyLoPassFreqValueChanged:(id)sender {
    UISlider *slider = (UISlider *)sender;
    [self groupForKey:kHarmonyGroupKey].eq.lowPassCutoff = slider.value;

Can you guys offer some help in modifying filter values in realtime?

Apologies if this has been asked before. I have been searching the forum with no luck.
Edit 2:
I am on AAE 1.5.5 at the moment. Silly thing about Agile development is updating things doesn't always make it to the product backlog :)


  • Hey @marko. Have you definitely verified that [self groupForKey:kHarmonyGroupKey].eq is returning the same instance of the AELowPassFilter?

  • @Michael

    Thanks for chiming in. It was some unrelated issue. I was using the filter on a set of AEAudioPlayables that were not playing anything. thanks for confirming that is indeed possible. cheers.

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