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For English (and I think Japanese), HTS with the STRAIGHT vocoder can be pretty amazing. Very amazing. Licensing on both of those pieces is problematic. (Edit:

For English (and I think Japanese), HTS with the STRAIGHT vocoder can be pretty amazing. Very amazing. Licensing on both of those pieces is problematic. (Edit: I should probably mention that HTS is not easy to use. It will require some mental fortitude.) Festival can produce very good results, but you have to get into the weeds with it and do a lot of planning. If you don't like Scheme, you're not going to like dealing with festival, and if you do like scheme, you're going to be frustrated by their particular scheme. I've also noticed a lot of folks looking at post filtering, but that is a sea of dragons at the moment.

roel_v 11y ago
Assuming that for their demo at http://flite-hts-engine.sp.nitech.ac.jp/ http://flite-hts-engine.sp.nitech.ac.jp/ they would select a good data set and parameters, I have to say that I'm not particularly impressed. Do you know of any online examples of a well-tuned Festival set up? I didn't find the 'official' Festival or Festvox examples especially great, certainly worse than online available TTS services, and I have never been able to find an example of a well-tuned result of Festival.
- superkuh 11y ago
  Flite is not Festival. It is a very cut down version for embedded machines.
  - roel_v 11y ago
    Yes I know, but the GP commented on both Flite and Festival, and I addressed both comments - albeit, I'll admit, in a tangled way.
  - anthk 11y ago
    Flite lacks entonation on questions and such. It will work better on the ZipitZ2 and pentium2 machines. Enough to listen short stories, but it's not suited to listen a full book from you bed.
- michael_h 11y ago
  I don't know of any online examples, sorry. The problem is that a well-aligned festival voice is not academically interesting, so people generally don't publish it. Festival performs well when it can rely solely on unit selection and has multiple choices of the same phoneme sequence. Once it has to do some guessing on the synthesis, you'll see a drop in quality. With a small bit of work, you can have festival use an HTS voice directly. I usually use festival to generate my label files, post filter the phoneme timing, synthesize with HTS, then apply a post-filter.
posttool 11y ago
It is worth mentioning that STRAIGHT requires MATLAB.

roel_v 11y ago

Assuming that for their demo at http://flite-hts-engine.sp.nitech.ac.jp/ http://flite-hts-engine.sp.nitech.ac.jp/ they would select a good data set and parameters, I have to say that I'm not particularly impressed. Do you know of any online examples of a well-tuned Festival set up? I didn't find the 'official' Festival or Festvox examples especially great, certainly worse than online available TTS services, and I have never been able to find an example of a well-tuned result of Festival.

superkuh 11y ago
Flite is not Festival. It is a very cut down version for embedded machines.
- roel_v 11y ago
  Yes I know, but the GP commented on both Flite and Festival, and I addressed both comments - albeit, I'll admit, in a tangled way.
- anthk 11y ago
  Flite lacks entonation on questions and such. It will work better on the ZipitZ2 and pentium2 machines. Enough to listen short stories, but it's not suited to listen a full book from you bed.
michael_h 11y ago
I don't know of any online examples, sorry. The problem is that a well-aligned festival voice is not academically interesting, so people generally don't publish it. Festival performs well when it can rely solely on unit selection and has multiple choices of the same phoneme sequence. Once it has to do some guessing on the synthesis, you'll see a drop in quality. With a small bit of work, you can have festival use an HTS voice directly. I usually use festival to generate my label files, post filter the phoneme timing, synthesize with HTS, then apply a post-filter.

posttool 11y ago

It is worth mentioning that STRAIGHT requires MATLAB.