[sdiy] Quad VCA design

Wed May 15 20:16:49 CEST 2013

Hi Dave,

Ron Dow designed a good deal of the early SSM devices when I worked at e-mu back in the late 1970's to 1984.  PMI bought out ssmt and adi bought out pmi. Precision monolithics inc.

Ron, Dan parks , Dave rossum and I were all working on emulator, audity, drumulator and the last of the modular e-mu products.

Best regards,

Terry

Sent from my iPad

On May 15, 2013, at 11:03 AM, Dave Manley <dlmanley at sonic.net> wrote:

> Terry, who is Ron Dow?  I've not run across his name before.
> 
> -------- Original Message --------
> From: Terry Shultz <thx1138 at earthlink.net>
> Sent: Wed, May 15, 2013 10:50 AM
> To: cheater00 . <cheater00 at gmail.com>
> CC: synth-diy <synth-diy at dropmix.xs4all.nl>
> Subject: Re: [sdiy] Quad VCA design
> 
>> Well, I try to entertain a little.
>> 
>> Normally, I try not to impress with extensive knowledge. I can learn a lot of new tricks if I listen and don't talk at the same time.
>> 
>> Unfortunately, I have spent too much time in designing chips, and have been passed by newer audio solutions.
>> 
>> Remember, it has been since 1985, since I have done any new synth modules. 
>> 
>> Since then, old friends like Doug Curtis and Ron Dow have passed away and so has many of the products.
>> 
>> Evan Brooks, cofounder of Digidesign contacted me back in March and suggested I re-enter the analog designs again. He feels this market might still have some sales going forward.
>> 
>> We'll see.
>> Regards,
>> 
>> Terry
>> 
>> 
>> Sent from my iPad
>> 
>> On May 15, 2013, at 10:35 AM, "cheater00 ." <cheater00 at gmail.com> wrote:
>> 
>>> Self-destruction! And I thought this thread was going to end up boring ;-)
>>> 
>>> On Wed, May 15, 2013 at 6:30 PM, David G Dixon <dixon at mail.ubc.ca> wrote:
>>>> I have used V2164 in virtually every module I've designed in the last three
>>>> years, and it's brilliant.  It has its quirks (you will get very familiar
>>>> with the fine print of the datasheet, especially if you try to do
>>>> unconventional stuff with it), but it is a solid performer.  Just don't try
>>>> to power it up backwards.  Unlike most opamps, it will self-destruct
>>>> instantly (as would the SSM2164).
>>>> 
>>>> 
>>>>> http://www.smallbearelec.com/servlet/Detail?no=737 - $3.50
>>>>> singles // comes down quickly from there in multiples..
>>>>> 
>>>>> On 15/05/2013 16:11, Terry Shultz wrote:
>>>>>> Hi Damian,
>>>>>> 
>>>>>> Any cost idea on small volume usage?
>>>>>> 
>>>>>> Regards,
>>>>>> 
>>>>>> Terry
>>>>>> 
>>>>>> Sent from my iPad
>>>>>> 
>>>>>> On May 15, 2013, at 7:15 AM, "cheater00 ."
>>>>> <cheater00 at gmail.com> wrote:
>>>>>> 
>>>>>>> Hi Terry,
>>>>>>> people here really like the CoolAudio chips. The V2164 has
>>>>> met with
>>>>>>> great reception on the list and is a very good equivalent
>>>>> to the SSM
>>>>>>> 2164.
>>>>>>> 
>>>>>>> Cheers,
>>>>>>> Damian
>>>>>>> 
>>>>>>> On Wed, May 15, 2013 at 2:39 PM, Nathanael King
>>>>>>> <nate at paperproductsmusic.com> wrote:
>>>>>>>> Not only does THAT have the 2180 line, but they also have
>>>>> an ssm2164
>>>>>>>> available in 2 vcas (2162) in a surface mount package.
>>>>> http://www.thatcorp.com/2162_Dual_Pre-Trimmed_Blackmer_IC_Voltage-Co
>>>>>>>> ntrolled_Amplifier.shtml
>>>>>>>> 
>>>>>>>> Nate
>>>>>>>> 
>>>>>>>> On Wed, May 15, 2013 at 8:33 AM, Terry Shultz
>>>>> <thx1138 at earthlink.net> wrote:
>>>>>>>>> Hi All,
>>>>>>>>> 
>>>>>>>>> I have finally used the last of my SSM2020 devices on my
>>>>> boards and
>>>>>>>>> it is time to re-design the Quad VCA and Universal
>>>>> Active filter modules.
>>>>>>>>> 
>>>>>>>>> I was looking at the LM13600/LM13700 and THAT Corp. VCA devices.
>>>>>>>>> 
>>>>>>>>> Any thoughts on those devices vs. other methods of
>>>>> building a Solid
>>>>>>>>> VCA design?
>>>>>>>>> 
>>>>>>>>> I have not had to re-build these modules for over 25 years, so I
>>>>>>>>> get to explore a whole new analog approach again.
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> I will not use the Grey Market SSM's if I can help it, but
>>>>>>>>> Rochester Electronics seem to have SSMSSM 2014/ SSM2018,
>>>>> SSM2122 devices.
>>>>>>>>> 
>>>>>>>>> Any thoughts?
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> Terry Shultz
>>>>>>>>> thx1138 at earthlink.net
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> _______________________________________________
>>>>>>>>> Synth-diy mailing list
>>>>>>>>> Synth-diy at dropmix.xs4all.nl
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>>>>>>>> 
>>>>>>>> 
>>>>>>>> 
>>>>>>>> --
>>>>>>>> Nate King
>>>>>>>> Paper Products Music
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>>>>> 
>>>>> --
>>>>> BugBrand LTD
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>>>>> VAT No. GB 988 2629 57
>>>>> 1 Ninetree Hill
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