Doepfer

Hi!

I think if the flange/chorus sound is working, then the BBD's working in general.  The delay effect isn't something different, it's the exact same effect only much slower.

In my opinion, once you get the delay clock knob below about half way, you get a bit too much signal degradation and clock noise.

Try a delay clock setting of about 5, with the feedback just shy of causing a feedback loop that gets louder each iteration, and the mix of half sounds good.

Bear in mind these delays will be very short, but they will be delays nonetheless.

You should be able to get these sounds out of it: https://soundcloud.com/doggiedogster/a-188-1b-delay-test  (Sorry for the ear-piercing clock signal bleedthrough!  I was aiming to give an accurate depiction of the raw, untamed module.)

Hope that helps,
Zoë.

Hi Blair,
it sounds like your unit behaves like it should. For slower and more pronounced delays you might have chosen the BBD with 4096 stages or the Tapped BBD.
Cheers
Jakob

Hello Blair

I found
http://www.doepfer.net/A100_sounds/BBD_1024_fullrange_manual.mp3

It seems to be a full turn of the Delay-Clock potentiometer. No other 
controll voltage is connected to the module. You may check whether your 
module provides similar results.

Florian

Hmm, if you turn the clock frequency down, can you hear the clock as a high pitch?  It sounds like your particular module might be calibrated to be a higher frequency than mine..?

The 1024 stage BBD module I have makes for a great chorus/flanger and can just about do very short delays, whereas the 4096 stage one I have is much better for delays.  Even then, I can still hear good delays with the 1024 stage module, they're just very short ones, and you can hear the clock below about the 50% mark.

If yours can't go slower than the flange point, into the delay zone, it sounds like it might simply be calibrated to run faster.  If you can't hear the clock whine at lower frequencies, I think that would confirm this.

All the best,
Zoë.

Hello Blair

On 26.03.14 08:28 , blair_cowan@mac.com wrote:
>  If I turn the feedback up, all I
> get is hum.
If you hear a hum, then it is quite likely that something is broken in 
your module.

Florian

Sounds to me like a faulty exponential converter of the high-speed VCO.
Probably the transistor array CA3096 has to be replaced. If the module is
still under warranty please return it to Schneidersladen. Otherwise I'd
recommend to look for a CA3096 and replace the existing circuit.

Best wishes
Dieter Doepfer

> Thanks for posting the link to the sound clip. My 1-188-1
> generates no clear repeats like those in the mp3. In fact it
> generates no repeats atall, even with Delay Clock set to zero. I
> don't hear the clock noise and aliasing at this setting either.
> If I turn the feedback up, all I get is hum. If there is a
> potentiometer i could try adjusting on the circuit board, I would
> try that. However I think the unit will need to be returned to
> Schneidersladen.
>
>
> Cheers,
>
>
> Blair

Sorry for the troubles. The module will be repaired for free.

Dieter Doepfer

> Dieter,
>
>
> Thank you for your analysis. Yes, my A-188 is still under
> warranty (it was only purchased three weeks ago). I have slready
> contactef Schneidersladen, and I will return the unit to them for repair.
>
>
> In the meantime I can use my A-199 spring reverb for effects, as
> that works just fine!
>
>
> Best wishes,
>
>
> Blair.
>
>
>
>

Hi Dieter,

my faulty A-188-1 has been returned to Schneidersladen, and I believe it is already on its way to you for repair.

Hopefully it will prove to be a straighforward fix.

Kind regards,

Blair