That's impossible without a lowpass on principle. E.g. if the clock rate is
500Hz you need a lowpass that supresses this frequency. The suppression will
we the better the higher the slope of the lowpass (6/12/24/48...dB/Oct). For
a lowpass with a small slope (e.g. 6 or 12 dB) the frequency has to be even
smaller (e.g. 200 or 300Hz) for a satisfactory suppression. Consequently the
sound will become more "dull" because of the missing higher frequencies.
This is a general drawback of all analog delays. Consequently for analog
delay applications the longest BBD should be used (i.e. MN3005/4096 stages).

The planned (probably dual) SC filter will be a suitable supplement to the
BBD modules as it will probably include two 30dB filters with common
frequency control. One of the filters can be used for the audio input (if
desired), the second for the audio output of the A-188-1.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von djsoysos
> Gesendet: Sonntag, 23. Juli 2006 00:55
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 clock noise A-188 1-B (1024 stage) analog delay
>
>
> Hello all,
> I just recieved my Doepfer rack (digging it by the way)
> My question is about the clock noise at low delay times
> on the A-188 1-B (1024 stage) analog delay.
> I had read Ingo's message # 9525 about filtering
> clock noise before I bought the A-188 1-B.
> But I didn't realize the noise was as bad as it is.
> I need to use the delay at slower speeds for the
> dubby stuff I do and hate to have to use a low pass filter
> just to clean it up. Any other fixes or mods
> Soy Sos
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> Yahoo! Groups Links
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