Log Message:
Updated audio/sptk 3.6 to 3.9
-----------------------------
Version 3.9:
 * support full covariance for 'gmmp' command.
 * add -B, -c1 and -c2 option to 'gmmp' command to specify block size and \ 
structure of covariance matrix.
 * change temporary file path for csh.
 * bug fixes.

Version 3.8:
 * add 'c2ndps' command for transform from cepstrum to negative derivative of \ 
phrase spectrum.
 * add 'mgclsp2sp' command for transform from LSP to spectrum.
 * add 'ndps2c' command for transform from negative derivative of phrase \ 
spectrum to cepstrum.
 * add 'wavjoin' command to save stereo wav file.
 * add 'wavsplit' command to load stereo wav file.
 * add -V option to 'dtw' command for loading DTW results.
 * add -e option to calculate inverse matrix stably for 'delta' and 'vc' commands.
 * support MAP estimation in 'gmm' command.
 * replace -i option to -q option for 'lsp2lpc,' 'lspcheck,' and 'mgclsp2mgc' \ 
commands.
 * change -c option of 'mlsacheck' command.
 * update swipe and hts_engine API.
 * bug fixes.

Version 3.7:
 * add 'vc' command to perform GMM-based voice conversion.
 * add 'lsp2sp' command to transform LSP coefficients to spectrum.
 * add -R option to 'mlsacheck' command to specify threshold value.
 * add -f option to 'gmmp' command to specify full covariance matrix.
 * add -M, -c1 and -c2 option to 'gmm' command to specify block size and \ 
structure of covariance matrix.
 * add -n option to 'delta' command to specify order of regression polynomial.
 * add -magic and -MAGIC option to 'rmse' command to delete and substitute magic \ 
number.
 * add -n and -t option to 'rmse' command to specify order and number of vector, \ 
respectively.
 * add -POWX, -LOGX option, and new constant (semitone) to 'sopr' command.
 * add -l option to 'decimate' and 'interpolate' command to specify length of vector.
 * add -g and -G option to 'lspcheck' command to check value of gain.
 * add -L option to 'lspcheck' command to specify log gain.
 * add -n option to 'mgc2mgclsp' command to specify split number of unit circle.
 * add -p and -d to 'mgc2mgclsp' command to specify maximum number and end \ 
condition of interpolation.
 * add -x 16, 22, 24 and 48 option of 'glogsp' and 'grlogsp' command to specify \ 
more x-axis scales.
 * add filter coefficients for 7:4 down-sampling, 3:5 and 7:8 up-sampling.
 * unify option to specify log gain into -L option.
 * fix -c option of 'mlsacheck' command to specify the type of modification of \ 
filter coefficients.
 * bug fixes.