[sdiy] reverb mad from multiple delays

[blacet at blacet.com]

The Delta Lab was a decent delay; used ADM, adaptive delta modulation.
This saved memory but the board filled up an entire 19" rack mount box.

Could be done much more economically today.

I used to have a lot of fun jammming with that delay.


> I'm pretty sure the delays can't be equally spaced, without sounding
> like a flutter. I was figuring I'd need to have 8 delays with separate
> clocks to sound smooth at all. An EMT 250 is bigger than a Mac Pro
> tower, so it must have a lot of stuff in it!
>
>
> Mark
>
>
>
>
> On Oct 21, 2009, at 7:30 PM, Chris Muir wrote:
>
>>
>>
>> I've done reverby things using the Eventide Orville that could be
>> done in hardware. Basically a handful of delay lines and a matrix
>> mixer gets you in the ball park, but the reverb-ness is _very_
>> sensitive to specific delay times and feedback settings from the
>> matrix mixer. Get some of those setting wrong, and it becomes a pile
>> of delays. If you're stuck with evenly spaced delays, I don't think
>> that you'll pull a good reverb out of it, but I've been surprised
>> before. Reverb is a black art.
>>
>> A few all pass filters & comb filter to smear things slightly help
>> immeasurably.
>>
>> - C
>>
>> On Oct 21, 2009, at 3:10 PM, mark verbos wrote:
>>
>>> Hi there,
>>>
>>>
>>> I recently built a digital delay based on the Buchla 288. It has 8
>>> equally spaced delays, with individual outputs and sliders on the
>>> front panel. Some of the sounds I can get from this got me thinking
>>> about hardware reverb. I know that there was the 3011 BBD that was
>>> used to make reverb, but I think it could be done much better with
>>> digital techniques (of course I mean hardware digital, not the
>>> sensible DSP/micro solution ;). There was a guy from Chile who did
>>> something like this with 6 PT2399 chips and it sounded pretty good.
>>> I'd like to do something like that, but with control over everything.
>>>
>>> Does anyone have experience doing this and/or have documents from
>>> the old studio units that did it? I'm thinking it would help
>>> immensely to see schematics for the EMT 250, Eventide SP2016, AMS
>>> RMX and whatever other reverb units were being made before
>>> everything went software...
>>>
>>> Mark
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>>
>> Chris Muir
>> cbm at well.com
>> http://www.xfade.com
>>
>>
>>
>>
>>
>>
>
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