Need fx pedal schemes, esp flangers

[jhaible]

> From: Harry Bissell <harrybissell at prodigy.net>
> The S/H aperture time of the BBD is a function of clock frequency... as
the
> clock drops
> the aperture time (read averaging time) gets larger... Yes you can
> theoretically get "any level" within the small range between noise floor
and
> clipping. But it is the average value for that period... That is a form of
> quantization...

No, I think it's a form of *filtering* (something like sin(x)/x, if memory
serves) - not quantisation. The fact that you have a staircase waveform
doesn't mean that the stairstep levels are quantized to a limited number of
possible levels.


> Unfair to LOCAL 12 (villains thieves scoundrels union)
> Referring to the "sampled discrete data" that you get from a BBD as
> "analog" is grossly unfair to "real" analog circuits. It gives Analog a
bad > name... The BBD is a cheap piece wise sampler... its artifacts are way
worse sounding
> than most A/D_memory_D/A systems (see how I avoided the "D" word)...

Now "sampler" has to do with sampling (time discrete), so I guess you're
right on that part. "Digital" has to do with your fingers (counting the
number
of discrete levels, and storing the number rather than the level), so that's
not appropriate for a BBD system.


As for the sound, that's not only a matter of taste, but also a matter of
implementation in a specific device. There are BBD circuits that don't
even have anti-aliasing filters - you like the artefacts or you rather
stay clear from these. Or use them with inherently band limited
input signals.
And there are BBD systems that were tailored for studio use which cost
several thousand bucks when they were new. I have a Dynacord SRS-56
that is so clean that I have it as a main echo in the mixer all the time.
And it's hard to find another device that provides the same "magic"
for my sound.

JH.