FX send / return

[mixxxbot]

Reported by: rob2192
Date: 2013-01-07T23:00:17Z
Status: Confirmed
Importance: Wishlist
Launchpad Issue: lp1097070
Tags: effects

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The Addition of Effects Send and Return channels would be really useful, to allow both software and hardware effect packages to be connected to mixxx.

There should be a way of selecting each deck, mic, L +R side of crossfader and the master to send to these effects channels.

This could later be integrated into the larger effects set currently in development.

[mixxxbot]

Commented by: ywwg
Date: 2013-01-08T14:25:24Z

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It would also be cool if those effects sends could be sent to actual audio devices for integration with JACK or actual effects boxes. Implementation would just be putting a shim between the decks and the mixer parts of the engine.

[mixxxbot]

Commented by: rob2192
Date: 2013-01-09T12:55:41Z

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I think the easiest way to implement it at the moment would to link it with with the current effects and have a button to turn send/return on and of, then use current FX buttons to add effects to Deck 1 or 2.
The channels to input / output should be configurable in preferences, in the same way as all other ins and outs.

This can latter be built in to a complete effects package where send/return is an effect that can be selected, just like pro mixers and some other software.

[mixxxbot]

Commented by: Be-ing
Date: 2017-12-28T03:04:15Z

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As discussed in #1254 (comment) , external software effects would be supported much better by implementing support for plugin formats designed for this purpose such as LV2 (Bug #⁠1530238) and VST (Bug #⁠1740335). We cannot use Mixxx's controller mapping system to interface with separate programs in a reliable and intuitive way, but we can do that with effect plugins.

As for send/return loops with hardware effects, that is not technically possible because our effect units have switchable inputs and a hardware send/return loop introduces more latency. The extra latency could only be compensated for to keep all channels aligned if the signal path was fixed. Switching the latency of a signal path during playback would create brief gaps of silence and the signal path with added latency would be misaligned in time with the other channels.

[mixxxbot]

Commented by: daschuer
Date: 2017-12-28T09:49:03Z

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Can't we do this already? We can pass the r/l bus to an external app and return it to Mixxx via Aux? What is missing to use this in a priority DAW setup?

[mixxxbot]

Commented by: daschuer
Date: 2017-12-28T09:49:52Z

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priority -> professional

[mixxxbot]

Commented by: Be-ing
Date: 2017-12-28T13:42:02Z

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Professional DAW setup? Mixxx is not a DAW, nor it should it be. If we aim to make Mixxx a DAW, we will overcomplicate its use as a live performance tool.