In the 1970s, digital pattern playbacks began to supplant the earlier version. An early prototype was developed by Patrick Nye, Philip Rubin, and colleagues at Haskins Laboratories. It combined a "Ubiquitous Spectrum Analyzer"[1] for automatic spectral analysis, along with a VAX GT-40 display processor for graphic manipulation of the displayed spectrogram, a form of "synthesis by art", and subsequent re-synthesis using a 40 channel filter bank. This hybrid hardware/software digital pattern playback was eventually replaced at Haskins Laboratories by the HADES analysis and display system, designed by Philip Rubin, and implemented in Fortran on the VAX family of computers. A more modern version has been described by Arai and colleagues [2]. An on-line demonstration is available [3].
"Haskins Laboratories". Haskins.yale.edu. Archived from the original on February 18, 2006. Retrieved 2016-10-21. https://web.archive.org/web/20060218162059/http://www.haskins.yale.edu/featured/patplay.html ↩
"History of speech synthesis, 1770 - 1970". Ling.su.se. 1997-07-08. Archived from the original on 2015-03-06. Retrieved 2016-10-21. https://web.archive.org/web/20150306045954/http://www2.ling.su.se/staff/hartmut/kemplne.htm ↩
【1950 | Pattern Playback Machine】 Dr. Franklin S. Cooper - An Early Talking Device in 1950, retrieved 2023-02-26 https://www.youtube.com/watch?v=9bGEzOxDxs4 ↩