BBDs: ADA Stereo Tapped Delay

[DiyFreaque]

The dream is over.  I'd sent an RFQ to 4 Star for MN3011's.

Got an answer back today - 4 Star has no stock available.  

Scott

[David]

The dream is over.  I'd sent an RFQ to 4 Star for MN3011's.

Maybe not -- remember this?

No time nowadays for me to dig up links, sorry...

look for Tom Scholz @ the patent office...
(R*ckman-likestuff with 3011 & 3014(?));

look for Logan, Jr. et al. (=Schroeder) (~`60s) for reverb mix/FB theory @ p.o. ("all-pass reverb.")

Elektor (D) 2/`79 & 5/`79 for theory, 2/`90 for praxis.

look at the 3011 datasheet delaytimes-table:
19.8 to 166.4 ms (@ 10kHz clck), with no multiple relation amongst each other...
in the 3011, this is achieved by tapping the delayline at appropiate stages,
while the whole line gets the same clock.

roll yer own #1:
series-circuit 6x 3007, clock individually such that 1st chip delays 19,8ms, the second according to a.m. table`s delay time difference between 1st and 2nd tap, and so on...
voila: 3011 cloned functionally.

like Mark has mentioned before: due to heterodyning, you can (rather: will) get bad artefacts/whine-ing.

to get rid of that, there are hints/tips/tricks in the forum`s vault...

roll yer own #2:
parallell them, clocking individually to get the delay times as stated in the table...

oops - getting off topic... more later...

[puretube]

if the number of knobs/control don`t matter,
one could think of the following setup with multiple tap reverb
(be it 3011, 3214, or multiple "discrete" BBDs):
a rotary switch for selecting which tap as a general output (decay),
and one for selecting which tap(-s) to feed back (density).

Probably feeding the shorter taps with more "highs-content",
while feeding back the longer taps through steeper or lower cut-off low-passes.

[puretube]

http://diystompboxes.com/sboxforum/viewtopic.php?p=236254#236254