<div dir="ltr">Great info folks, thanks very much! I think for this video I will heed Erica's request and keep it as a flanger or slapback. It sounds pretty awesome doing that ! I already have two Pico DSP and one Erica digital delay for the longer repetitions...<div><br></div><div>Cheers and a great day to all!</div><div><br></div><div>Q</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Oct 23, 2018 at 9:26 AM <<a href="mailto:rburnett@richieburnett.co.uk">rburnett@richieburnett.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I doubt that pursuing any sort of "out-phasing" technique like that to <br>
reduce the clock feed-through would ultimately be very fruitful.<br>
<br>
The amplitude of the clock feed-through likely depends on the <br>
instantaneous clock frequency. The phase shift of the feed-through may <br>
also vary with frequency, and your integrator to convert the clock from <br>
square to triangle would add 90 degrees worth of phase shift to start <br>
with anyway... It would therefore be hard to achieve any significant <br>
degree of cancellation over a range of clock frequencies, in my opinion.<br>
<br>
I'd be looking at a static LPF or some sort of tracking filter to remove <br>
the clock feed-through, once I was happy that the original design was <br>
working properly, or at least as good as it can do.<br>
<br>
-Richie,<br>
<br>
<br>
<br>
On 2018-10-23 14:36, Quincas Moreira wrote:<br>
> I’ve thought of using na integrator to derive a triangle from the<br>
> clock pulse, then an OTA to distort it into a sine, then invert it and<br>
> sum it to the BBD output thus cancelling most of the bleed but now<br>
> we’re talking a full on daughterboard, lol<br>
> <br>
> Sent from my iPad<br>
> <br>
>> On Oct 23, 2018, at 8:12 AM, Tom Bugs <<a href="mailto:admin@bugbrand.co.uk" target="_blank">admin@bugbrand.co.uk</a>> wrote:<br>
>> <br>
>> There appears to be minimal input and output filtering also.<br>
>> <br>
>> <br>
>>> On 23/10/2018 14:07, Vladimir Pantelic wrote:<br>
>>> no output balance trimmer between out1 and out2 on this one<br>
>>> <br>
>>>> On 23.10.2018 14:46, Quincas Moreira wrote:<br>
>>>> Sorry Folks, please follow this link<br>
>>>> <a href="https://drive.google.com/open?id=1O5kKkaJZqom61W8WQKQCfm3gLF83goz0" rel="noreferrer" target="_blank">https://drive.google.com/open?id=1O5kKkaJZqom61W8WQKQCfm3gLF83goz0</a><br>
>>>> <br>
>>>> Sent from my iPhone<br>
>>>> <br>
>>>> On Oct 23, 2018, at 06:13, Tom Wiltshire <<a href="mailto:tom@electricdruid.net" target="_blank">tom@electricdruid.net</a><br>
>>>> <mailto:<a href="mailto:tom@electricdruid.net" target="_blank">tom@electricdruid.net</a>>> wrote:<br>
>>>> <br>
>>>>> The list strips attachments. Can you post a link?<br>
>>>>> <br>
>>>>> <br>
>>>>>> On 23 Oct 2018, at 08:30, Quincas Moreira <<a href="mailto:quincas@gmail.com" target="_blank">quincas@gmail.com</a><br>
>>>>>> <mailto:<a href="mailto:quincas@gmail.com" target="_blank">quincas@gmail.com</a>>> wrote:<br>
>>>>>> <br>
>>>>>> thanks folks. It’s a new<br>
>>>>>> module, not yet released V3205 based. Strange that you don’t see <br>
>>>>>> the<br>
>>>>>> pdf attachment, I’ll try again in the morning<br>
>>>>>> <br>
>>>>>> Sent from my iPhone<br>
>>>>>> <br>
>>>>>> On Oct 22, 2018, at 23:59, Pete Hartman <<a href="mailto:pete.hartman@gmail.com" target="_blank">pete.hartman@gmail.com</a><br>
>>>>>> <mailto:<a href="mailto:pete.hartman@gmail.com" target="_blank">pete.hartman@gmail.com</a>>> wrote:<br>
>>>>>> <br>
>>>>>>> As others have said a lot depends on which BBD we're talking <br>
>>>>>>> about.<br>
>>>>>>> <br>
>>>>>>> Most of my BBD experience is with Blacet's Time Machine. It uses<br>
>>>>>>> the MN3005 which has balanced outputs, which can be trimmed to<br>
>>>>>>> minimize the clock bleed, and it also uses clock dependent <br>
>>>>>>> filtering<br>
>>>>>>> and compansion to help reduce the noise further. I have also <br>
>>>>>>> played<br>
>>>>>>> some with the Doepfer A-188-2 which uses a tapped BBD, and that <br>
>>>>>>> does<br>
>>>>>>> *not* have balanced outputs, so the bleed is harder to tame.<br>
>>>>>>> <br>
>>>>>>> I looked at the Erica site as well, and honestly, I can't tell <br>
>>>>>>> which<br>
>>>>>>> one you're asking about either. Let us know/attach the schem, <br>
>>>>>>> and<br>
>>>>>>> I'm sure someone will have suggestions :)<br>
>>>>>>> <br>
>>>>>>> Pete<br>
>>>>>>> <br>
>>>>>>> <br>
>>>>>>> <br>
>>>>>>> On Mon, Oct 22, 2018 at 8:55 PM Quincas Moreira <br>
>>>>>>> <<a href="mailto:quincas@gmail.com" target="_blank">quincas@gmail.com</a><br>
>>>>>>> <mailto:<a href="mailto:quincas@gmail.com" target="_blank">quincas@gmail.com</a>>> wrote:<br>
>>>>>>> Hey friends! I'm working in a review of the new Erica Synths BBD<br>
>>>>>>> module, and I'm getting massive bleed of the clock frequency <br>
>>>>>>> (though<br>
>>>>>>> it looks sinusoidal rather than square)<br>
>>>>>>> Any tips on minimizing this bleed? Anytime the clock steps into<br>
>>>>>>> audible range it's super loud<br>
>>>>>>> <br>
>>>>>>> Schematics included...<br>
>>>>>>> <br>
>>>>>>> Thanks!!<br>
>>>>>>> <br>
>>>>>>> <br>
>>>>>>> <br>
>>>>>>> --<br>
>>>>>>> Quincas Moreira<br>
>>>>>>> Synth Diy Guy<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Quincas Moreira<br>Synth Diy Guy</div></div></div>