message from Rob Clark <[email protected]> to festival-talk = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Probably the best way to see how LPC works is to download the following:
The multisyn build tools. http://www.cstr.ed.ac.uk/downloads/festival/multisyn_build/ (These provide "unit selection" voice building tools, which include scripts for creating LPC and Residuals) See the files in the documentation directory. http://www.cstr.ed.ac.uk/downloads/festival/1.95/festvox_cstr_us_awb_arctic_multisyn-1.0.tar.gz This is an example multisyn voice. It hasn't been maintained so won't run unaltered with Festival 2.1 (If you want to run it with 2.1, define the scheme function it complains as missing as a function that does't do anything in the scheme file which defines the voice.) Otherwise just look at the scheme voice definition in the above file to see what scheme commands get called to do lpc synthesis. Note that for these functions to work, they requires certain relations in the Utt structure to exist and be meaningful. It is not too difficult to follow the scheme through to the C++. just grep for things in src/modules/*. It is much harder to follow what the signal processing code actually does and I haven't had to do so for a few years, so I can't really provide much advice. It is also worth noting that the same code can just do overlap and add if provided with a wave file and a pitch mark file rather than a residual and lpc coefs. Multisyn doesn't do pitch modification by default, but it can be turned on, it does sometimes break though with multisyn voice data, I think mostly when you ask it to do modification by an unreasonable amount. Regards, Rob. On 5 February 2012 13:30, Nickolay V. Shmyrev <[email protected]> wrote: > On 01/02/2012 at 13:54 +0530, Sriram Shankar wrote: >> Hi, >> >> I am trying to go deeper into Festival by trying to understand the >> code. As a task, I am trying to give a wave file from the command >> line, create its LPC coefficients and then resynthesize with LPC. My >> question: >> >> 1. What C++ classes can be used to analyze an input wave file into its >> LPC coefficients? > > EST_sigpr_utt > >> 2. Is there a document that explains the underlying C++ classes in the >> Festival code in greater detail? > > Yes, it's called "source code" > -- Rob Clark = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = University of Edinburgh's Festival Speech Synthesis System = = http://festvox.org/festival Sent Via [email protected] = = To unsubscribe mail [email protected] = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ Festlang-talk mailing list [email protected] https://lists.berlios.de/mailman/listinfo/festlang-talk
