[sdiy] reverb mad from multiple delays

[mark verbos]

Their delays were the inspiration for the mods I did to the Buchla 288  
to build it without the ultra rare serial memory chips Don used. Sort  
of like 8 Delta labs delays with lots of logic to do looping and some  
other tricks. I think I could fill up a 3 rack space unit if I tried  
to do a reverb using all discrete delays. Not that it would stop me....


Mark




On Oct 21, 2009, at 8:02 PM, blacet at blacet.com wrote:

> 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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>
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