[sdiy] Using dual BBD chips for higher clock frequency

brianw brianw at audiobanshee.com
Sat Jun 25 07:31:44 CEST 2022

BBD is so limited that nearly all of the rest of the signal path is different in a BBD product compared to a digital delay.

I'd predict that if *all* of the signal path *except* the BBD chip itself were identical, then the magic would still be there. In other words, focusing on the BBD chip itself to get a 'sound' is probably not the real mojo. All the band limiting, companding, overdrive, and other factors probably account for the perceived differences.


On Jun 17, 2022, at 2:20 AM, Roman Sowa <modular at go2.pl> wrote:
> I may be wrong, but possibly prefering BBD over ADC-RAM-DAC is the same thing as tube audio amp vs. solid state one.
> Price, performance, ease of use, unobtainable parts - it all does not matter then.
> Roman
> W dniu 2022-06-17 o 11:01, Mike Bryant pisze:
>> BBD is only about 12 bits accuracy at best, and there's plenty of cheap ADC/DACs that can run 12 bits at many megahertz.    Pair one of these with a cheap ARM processor with lots of memory.
>> -----Original Message-----
>> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Jay Schwichtenberg via Synth-diy
>> Sent: 17 June 2022 02:02
>> To: synth-diy at synth-diy.org
>> Subject: Re: [sdiy] Using dual BBD chips for higher clock frequency
>> Isn't one of the advantages of using a BBD over a digital solution is the clocking can go to 500 KHz to 1MHz?
>> So depending on the clock freq you can get the aliasing filters higher up and have better freq range.
>> Jay S.

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