[sdiy] Delays and companders

Tim Ressel timr at circuitabbey.com
Mon Mar 4 19:53:04 CET 2019


Or the 575. I think the 4305 has better performance.

--Tim (performance) Ressel

On 3/4/2019 10:40 AM, David Moylan wrote:
> SA572?
>
>
> On 3/4/19 10:32 AM, ulfur hansson wrote:
>> 4305's from THAT have been marked EoL :(
>>
>> mán., 4. mar. 2019 kl. 13:10 skrifaði Tim Ressel 
>> <timr at circuitabbey.com <mailto:timr at circuitabbey.com>>:
>>
>>     Hi,
>>
>>     In making a BBD delay often a compander is used to reduce noise. One
>>     schematic had a clever circuit that used one rms-dc block to run 
>> both
>>     the compressor and expander VCAs. This would make sense in a 
>> non-delay
>>     circuit. But in a delay where the output is not time aligned with 
>> the
>>     input, is it the right thing to do? It seems to me you want 
>> completely
>>     separate compressor and expander circuits with their own rms-dc 
>> blocks.
>>     Say a pair of 4305s from That Semi. Or am I in the weeds here?
>>
>>     --     --Tim Ressel
>>     Circuit Abbey
>>     timr at circuitabbey.com <mailto:timr at circuitabbey.com>
>>
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-- 
--Tim Ressel
Circuit Abbey
timr at circuitabbey.com



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