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DFT

日本語のREADMEはこちらです: README.ja.md

A simple audio processing demonstration using the Discrete Fourier Transform.

Data Source

Sekaide Ichiban Atsui Machi Sabae MP3 by Sing J Roy CC BY

Benchmarks

The repository provides benchmarks for the Discrete Fourier Transform (DFT) implementation in different environments:

M1 Macbook Pro, Deno in JavaScript: 33.18 sec
M1 Macbook Pro, in C: 11.786060 sec
M1 Macbook Pro, in C with 6 threads: 2.250893 sec
Core i7-6700 Windows 10, Deno in JavaScript: 84.94 sec
Core i7-6700 Windows 10, in C (gcc): 132.6863497 sec
Core i7-6700 Windows 10, in C (nvcc): 34.3973202 sec
Core i7-6700 Windows 10 NVIDIA RXT 3060Ti: 0.074750 sec
Core i7-6700 Windows 10 NVIDIA RXT 3060Ti (fast-math): 0.007705 sec

Compile and Run

Windows

powershell -C Measure-Command {./a.exe}

Compile dft_st.c with nvcc on Windows:

nvcc dft_st.c -D_USE_MATH_DEFINES

Mac

Compile dft_mt.c on Mac:

gcc dft_mt.c -D__device__=

License

MIT License — see LICENSE.