Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site druxp.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxj!mhuxn!houxm!ihnp4!drutx!druxp!mab From: mab@druxp.UUCP (BlandMA) Newsgroups: net.micro.cbm Subject: Re: Re: How good is speech synth. on C64? Message-ID: <645@druxp.UUCP> Date: Thu, 6-Dec-84 11:29:27 EST Article-I.D.: druxp.645 Posted: Thu Dec 6 11:29:27 1984 Date-Received: Fri, 7-Dec-84 02:31:42 EST References: <515@genrad.UUCP> <410@ihuxu.UUCP> <2130@garfield.UUCP> Organization: AT&T Information Systems Laboratories, Denver Lines: 33 > A newly released game (at least in > this area) called GHOSTBUSTERS has a reasonably recognizable synthesis of one > word..... THATS RIGHT, YOU GUESSED IT, IT'S GHOSTBUSTERS!!! > > While I haven't fully figured out how they did it yet, the basis seems to be > precise adjustments to the white noise voice. Anybody with a better handle > on the method pls let me know, 'cause, if "they" can do it, WE CAN TOO!! The noise waveform should be able to generate most all of the non-vocal phonemes (s, t, k, ch, ...). 'k' is easy - use low attack and decay values, maybe 0 for attack and 2 or 3 for decay. An 's' probably would have an attack of 2 or 3 (I'm guessing at these values, since I'm not near my 64 right now). If you're not into POKES, it's fairly easy to experiment with the SID values using the music programs that are on the market. I was able to make a human-sounding 'b' sound the other night using the triangle waveform and a filter. Seems like it was something like attack 3, decay 4 or 5, low sustain, low pass filter on, and the cutoff frequency was somewhere around 1500-2000. The frequency of the note was in one of the middle octaves. As the frequency changes, the cutoff frequency also has to change. I'm still new at figuring out how the filters work, but in this case, the filter is what makes the attack sound like a human-like 'b' rather than just a synthesized music note. Now I'm getting curious. When the Ghostbusters bass line music was posted last week, I went home and put it on my 64. Now it looks like I'm going to have to add speech to it. If I'm successful, I'll post something, but don't hold your breath waiting. -- Alan Bland {ihnp4, allegra}!druxp!mab AT&T Information Systems Labs, Denver