Clearing the buffer of a delay/reverb on playback?

Hi guys,

What’s the proper way for clearing the buffer of a delay/reverb on playback? I have some large buffers that need to be cleared at every playback to avoid overlapping tails. What’s the Best practice?

in your prepareToPlay() ?

prepareToPlay() is not called at every hit on the play button in the DAW. Some hosts do, some don’t.

I’ve used AudioPlayHead::CurrentPositionInfo to check for play/stop states, but I’d like to know if there’s a best practice for clearing the buffer. Right now I’m doing a simple buffer.clear() in a separate thread with same basic checks before processing audio, but I’m not sure if it’s the best approach.

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You could monitor the play state and clear your stuff when it starts/stop. But TBH I think as a DAW user I wouldn’t expect effects to suddenly cut off their tail when I start/stop playback. That’s not what’d happen with real outboard effect units.

I don’t know. Imagine you have a nice 60 second verb going on your super-drone music … now stopping on Stop seems a bit harsh,but if you jump back in the track and hit play from the beginning I think I’d expect it to STFU :slight_smile:

Yeah, the clear should only happen at every start, not stop. Many delays and reverbs do that, I’m just not sure what’s the best approach.

Using a separate thread and some basic checks seems to work ok, but I don’t want to reinvent the wheel :slight_smile:



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I love the way you two are calling them ‘real outboard effects’ as if in-the-box is some weird place where we try and emulate the past :wink:

I don’t like that either, but most users (for my experience) just doesn’t like to wait the tail to decay if they just checked a part of the song and then want to bounce. as devs we cannot take that for granted and we should, at least, offer behavioral options. my 2 cents

It’s bit cruel making them wait when feedback goes to 100% too…

When a DAW bounces/renders something, it’ll certainly call reset() on the plugin before starting, or even create a new instance.

This! :slight_smile:

Honestly, I don’t like it either, but many users requested this feature. Most of the big delays and reverbs plugins do that, it’s almost an expected feature.