The current resampling implementation is inconvenient because it only works for mono-channel and requires the user to use float time indices (monotonically)

Resampler should

• accept setting the sample rate
• implement sound.Source (multi-channel)

What is the intended import path of the cmplx package, and what is the intended location for it in the git repository? Currently, these to seem to be in disagreement with one another.

u@x61s ~/g/s/z/dsp> go get zikichombo.org/dsp/...
can't load package: package zikichombo.org/dsp/convol/cmplx: code in directory /home/u/goget/src/zikichombo.org/dsp/convol/cmplx expects import "zikichombo.org/dsp/cmplx"

This issue is a todo to add STFT analysis support together with a few basic feature extractors such as
spectral flux and mfcc

this todo does not include synthesis, which will come later.

At rev f6368de

u@x61s ~/g/s/z/d/dct> go test -count=1 zikichombo.org/dsp/dct
# zikichombo.org/dsp/dct
./plot_test.go:19:8: undefined: audio
./plot_test.go:26:3: undefined: ops.Slurp
FAIL	zikichombo.org/dsp/dct [build failed]

Much of the documentation in dsp is sloppy or non existent

This issue is to clean up docs, add some examples. It however largely depends on #1.

The module project-level dependencies firmly place dsp as needing sound. This is only for the frequency type and fft frequency-bin functions. The rest is just math with floats at this point.

It may make the module/project level dependencies cleaner to have the "pure" math independent of the frequency type. Then resampling could go in sound, which seems more appropriate because it is so fundamental an idea.

Hi!

I tried to go-get the dsp package today, and was greeted with the following error. Not sure exactly why. Do the vanity import path have to be a line-comment rather than a multi-line comment, or is it related to vgo, i.e. module support?

Cheers
/u

u@x61s ~> go get zikichombo.org/dsp/...
package zikichombo.org/dsp: /home/u/goget/src/zikichombo.org/dsp/doc.go:1: cannot parse import comment
package zikichombo.org/dsp/convol/cmplx: code in directory /home/u/goget/src/zikichombo.org/dsp/convol/cmplx expects import "zikichombo.org/dsp/cmplx"
u@x61s ~> go version
go version go1.10.3 linux/amd64
u@x61s ~> cat /home/u/goget/src/zikichombo.org/dsp/doc.go
// Copyright 2018 The ZikiChomgo Authors. All rights reserved.  Use of this source
// code is governed by a license that can be found in the License file.

// Package dsp is an umbrella for audio dsp
package dsp /* import zikichombo.org/dsp */

The half complex interface and the spectrum interface are confounding.

This is a result of adding the Real-only fft, which is really nice both interface and performance-wise (thanks @mattetti for the pointer) but which introduces questions about the spectrum interface because that is for full complex ffts.

This relationship needs to be hashed out, cleaned up, implemented, and tested.

dct spectrum plots are absolute value, they should be signed.