VCA For QuadSID boxes

[d2k]

He Guys...

Came across this chip from AD, SSM2164. It's PDIP stylee and contains four independent voltage controlled

amplifiers...

datasheet: http://www.analog.com/productSelection/pdf/ssm2164.pdf

of ne use? Perhaps this could even be mios controlled  - or have I lost the plot here...:P

Dan

[stryd_one]

MIOS mixer anyone?  ;D

Now I just need an IC to do EQing :)

I keep asking this question but nobody ever answers it...How do you guys find this stuff? Are you just thumbing through the 5000000000 hits I get on google? ;)

[Rowan]

Hi d2k

Here is a "easy" way to MIOS to control these:

Use duel track motor faders (eg alps RSA0K12V9001). One linear track for regular MIOS control voltages and a second log (I think) track to supply the CV to the VCA. These duel track MF's are out there, but are expensive (used in flying fader type systems).

Using the VCA's in this manner sould give total automation of the volume of analog signals via MIDI.

Like I said this would be expensive. Therefor using a DAC connected to the PIC would cost less. The trade off is the code that would have to be written to control the DAC's would be far more complex than the minor (if any) changes to MIOS by using duel track MF's

stryd_one: you should get your self a copy of a Farnell or RS catalog. It's a wealth of info.

Rowan

[stryd_one]

Thanks for the tip Rowan  :D :D Good on ya mate

[DrBunsen]

I haven't been able to look at the spec sheet yet, but if this chip does indeed use control voltage for the mix levels, you might consider the CV out module that TK is building for the MIDIbox SID.  The code for this is/will be built in IIRC.