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previous: Mike I Hello,The data for all of the P... -- 12/10/1998 1:05 PM View Thread

Re: Panasonic BBD Spec sheets

12/11/1998 7:41 AM
Mark Hammer
Re: Panasonic BBD Spec sheets
Thanks for the tip Mike. I've been searching for this stuff for ages, and never lucked into the right spot.  
Visitors to that site will also note the data sheet for the MN3011, the heart of the legendary A/DA-STD-1 (that stands for Stereo Tapped Delay, buddy, NOT sexually transmitted disease).  
The MN3011 is a 3000-stage+ BBD with assorted "taps" in the sequence so that delays of multiple length can be combined at the output mixer stage. Naturally, the intended use was for analog reverberation (rather than just discrete echoes). A/DA came up with a clever idea and used it for generating multiple concurrent flange/chorus FX, with the output from each of the 6 taps assignable to the left or right channel (or mono). Even 10 seconds of shallow thinking will leave you with your eyes glazed over by a universe of possibilities for FX generation and design.  
Unfortunately, the chip costs a bundle (about $50US) and is not widely available.  
While sifting through the site, however, I found another chip numbered the MN3214. This is one of their 5-volt series of BBD chips (just like the MN3207 is). Although it does not have as many stages as the MN3011 (<2000), it too has multiple taps (5), and is intended for analog reverberation. It also uses the same MN3101 or 3102 clock chip as the rest of the MN3xxx series.  
Chances are that this chip provides every bit as much flexibility in design as the MN3011, and is a good deal cheaper. I would expect that availability would be no worse than the 3011, and possibly better. The short delay length inherent in the chip precludes use for longer echoes, but the slapback, chorus, double-tracking, and flanging possibilities are immense.  
Happy exploring, and thanks again, Mike.