# vDSP.DFT A single- and double-precision discrete Fourier transform. ``` class DFT where T : vDSP_FloatingPointDiscreteFourierTransformable ``` ## Topics ### Initializers [`init?(previous: vDSP.DFT?, count: Int, direction: vDSP.FourierTransformDirection, transformType: vDSP.DFTTransformType, ofType: T.Type)`](/documentation/Accelerate/vDSP/DFT/init(previous:count:direction:transformType:ofType:)) Initializes a new discrete Fourier transform instance. ### Instance Methods [`func transform(inputReal: U, inputImaginary: U) -> (real: [T], imaginary: [T])`](/documentation/Accelerate/vDSP/DFT/transform(inputReal:inputImaginary:)) Returns a discrete Fourier transform. [`func transform(inputReal: U, inputImaginary: U, outputReal: inout V, outputImaginary: inout V)`](/documentation/Accelerate/vDSP/DFT/transform(inputReal:inputImaginary:outputReal:outputImaginary:)) Computes an out-of-place discrete Fourier transform. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)