Dune delay is not your standard delay, you can choose the amount of bounces there is in the delay and blend from the input audio to the delayed audio. You can control the shape of the delay so you can have the standard fading out delay or building delays. There are 10 delay shape to choose from and also other built in features such as gate effects for both left and right channels, a reverb, a filter, pan and volume controls.
Price: 5.99 dollar with unlimited updates
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