ȉ̐̊T

1)uC:\MyProgramvƌÕtH_[̐ݒD
2)̃tH_[ւ̃pX̐ݒD
3)FFTCu[ulibfftw3-3.dllv̎oD
4)ugnuplotṽpX̐ݒD

gnuplotgpăOt`܂̂ŁCŏɃCXg[ĂĂD

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t@C𓀂܂ƁCMyProgramƂÕtH_łƎv܂D̃tH_CfBNgɒuĉDʂƂ C:\MyProgram ƂȂ܂D

fftw-3.3.5-dll32.zip (2.6MB)𓀂libfftw3-3.dllƂt@CoC:\MyProgramtH_ɓĉDlibfftw3-3.dll ȊÕt@C͎gp܂D

ɁCC:\MyProgram ɃpXʂ܂D

windows10̏ꍇD

iPjRg[plJāCuVXeƃZLeBvJĂCXɁCuVXevJ܂D
iQj[́uVXȅڍאݒvJ܂D
iRjEChJ܂uϐvJ܂D
iSjuVXeϐv̒ɁuPathv܂̂ŃNbNCIĂҏW{^܂D
iTjuϐ̕ҏWvECh́uVKv{^āCC:\MyProgram ƑłނCRs[Ă\t܂Duցv{^gpĈԏɈړĂ܂D
̑̃Iy[eBOVXȅꍇCGȂ̂ŁCuwindows7 ϐ pXvƂČČĂD

pXʂCR}hvvgJ stft ƑłŉD

>stft
stft 2048 256 hn inp.wav out.dat

̂悤ɏo͂okłD

KȖÕtH_[쐬ĂCR}hvvg̃JgfBNgɐݒ肵ĂD

R}hvvg𗧂グĂC
>cd C:\EEE\KȃtH_ EnterKey
Ƒł݂܂D

邢́Ccd Xy[XL[ƑłłCGNXv[[tH_hbNAhhbvăfBNgݒ肷鎖\łD͂̕@ŎgpĂ܂D

̃tH_ɁCm1i65secjقǂwavt@CpӂCȉ̂悤ɃR}hłŉDwavt@ĆCTvOg44.1kHz PCMtH[}bgCmɑΉD

>stft 65536 8192 hn inp.wav out.dat

uinp.wavv̕wavt@C𓖂Ă͂߂܂Dwavt@Cinp.wavƉȒPm܂DCt@C͔Cӂɐݒł܂D

out.datƂt@Cł܂DSTFTϊiZԃt[Gjt@CłDg̓eLXgt@CłCTCY傫̂ŋTCỸeLXgɑΉGfBb^łȂƊJƂłDt[\tǵuGiga Text ViewervȂǂgD

ȉ̐gnuplotCXg[Ă̂Ɖ肵Ă܂D

Ɂuplot.batvҏW܂D

ȉ̂悤ɏĂ܂Cgnuplot̃oCitH_̃pXɏĉD
@ path C:\free\gnuplot\bin;%path%
C:\free\gnuplot\bin ̕ҏWCgnuplot.exetH_[ւ̃pXݒ肷킯łD

ҏWς񂾂Cplot ƑłŉDgnuplotɃpXʂ܂D

>plot

قǍ쐬tH_"\gp\pm3d-log.plt"t@CRs[܂D
ɁCgnuplotŃOt`܂Dȉ̂悤ɑłŉD1`2ʎԂ|܂D

>gnuplot pm3d-log.plt

ȏpngtH[}bg̃Otoオ܂D

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L̐ݒ肪ׂčς߂΁Cȉ̂悤ɂăOt܂D

iPjR}hvvgJăJgfBNgݒ肵܂D
iQjJgfBNg"\gp\pm3d-log.plt"t@CRs[܂D
iRj>stft 65536 8192 hn inp.wav out.dat
iSj>plot
iTj>gnuplot pm3d-log.plt

Aĕ̃Ot`ꍇC>plot R}h͍ŏ̈ōς݂܂Dgnuplot̃pXݒ肷邾Ȃ̂œRłD

Ytgnuplotp̃XNvǵCɒg͗płD`Ot̓ɍ킹ďC鎖ŁCɎRx̍ėp̂Ot܂D

g͂̏ꍇCwavt@C̒65bÓłD

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͂̕ł̓p[^[ύXKv܂D

iPjR}hvvgJăJgfBNgݒ肵܂D
iQjJgfBNg"\ʗp\pm3d-log.plt"t@CRs[܂D
iRj>stft 2048 256 hn inp.wav out.dat
iSj>plot
iTj>gnuplot pm3d-log.plt

"\ʗp\pm3d-linear.plt"gp\łD

wavt@C̒1.5`6bxÓłD

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stft.exe̋@\ƃp[^[܂D

>stft 2048 256 hn inp.wav out.dat

2048FFT̑傫łD

256͂炵łDFFTTCY8ƂāC炵4̏ꍇCTOIɂ͈ȉ̂悤Ƀf[^[炵FFTvZ鎖ɂȂ܂D́C炩ȃOt𓾂邽߂̍HvłD

123456781234567812345678
12345678
    56781234
        12345678
            56781234

炵́CʏCFFTTCY1/8ݒ肵ĉDFFTTCY2048Ȃ256C65536Ȃ8192łD

hn̓njO̎włDhmƂƃn~Og܂D
̑ biubN}j, bhiubN}nXjCbniubN}ibg[j, ftitbggbvjCriN^Ojgp\łDύXۂ́Cgnuplot̃XNvgŏIsȉ̗lɏCĂD
splot "out.dat" using 1:2:(4.3429*log($3)+6.0207) with pm3d		hn, hm, bh, bnp
splot "out.dat" using 1:2:(4.3429*log($3)+7.6048) with pm3d		tbggbvp
splot "out.dat" using 1:2:(4.3429*log($3)) with pm3d			N^Op

inp.wav͏Ώۂ̃t@CDTvOg44.1kHz PCMtH[}bgCmɑΉD

out.dat͏o̓t@CDiϊSTFTf[^̃t@CłDj

FFT̃TCYƂ炵2̐pɑIĉD
Ⴆ΁C
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024,
2048, 4096, 8192, 16384, 32768, 65536, 131072, ...
łD

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ACXg[
WXg͎gpĂ܂DݒutH_i C:\MyProgram jƁC̃tH_ւ̃pX폜ĉD

ȏłD
