[sdiy] Blackmer VCA cell

[houshu at muj.biglobe.ne.jp]

Dear Adam and list,


I'm so sorry for the confusing description.
uPC1252 is used just for total VCA in the polysynths.
Please check out the schematics of Juno106.
I guess they use 1252 to recall output signal level.


------ Original Message ------
差出人: "Adam Inglis (synthDIY)" <synthdiy at adambaby.com>
To: "houshu at muj.biglobe.ne.jp" <houshu at muj.biglobe.ne.jp>; 
"synth-diy at synth-diy org" <synth-diy at synth-diy.org>
送信済み: 日曜日, 2021/10/24  10:47
件名: Re: [sdiy] Blackmer VCA cell


On 23 Oct 2021, at 10:52 pm, houshu--- via Synth-diy 
<synth-diy at synth-diy.org <mailto:synth-diy at synth-diy.org> > wrote:

NEC uPC1252H2 uses a Blackmer cell, which were used in some Roland 
synths for loudness control, not for VCA with ADSR.

Sam, that’s interesting.
Do you recall how it was implemented, and in what synths?


“Loudness” suggests it was compensating for something.


A
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