[sdiy] Panning with LM13700

[Tom Wiltshire]

Thanks Jay.

I hadn't seen that version, but there's a very similar circuit in the later SSM2045 app note. It gives a -6dB centre, unfortunately - the "hole in the middle" I'm trying to avoid.

Tom


On 12 Jan 2017, at 19:42, Jay Schwichtenberg <jays at aracnet.com> wrote:

> Might look at the data sheet for the SSM2024. They have an application using
> a dual PNP pair to do panning and volume. Don't know if the curve is what
> you want though.
> 
> http://www.milton.arachsys.com/nj71/pdf/Siel/ssm2024.pdf
> 
> Look at figure 5 in the PMI data sheet or figure 7 in the AD data sheet.
> 
> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Tom
> Wiltshire
> Sent: Sunday, January 01, 2017 9:07 AM
> To: Synth-diy at synth-diy.org
> Subject: [sdiy] Panning with LM13700
> 
> Hi All,
> 
> Happy New Year to everyone! Here's hoping you all have a great year with
> many (completed) synth projects.
> 
> I've got  quick question - what's the best way to do equal power panning
> (-3dB in the centre) with the LM13700? I'm assuming that such a thing has
> been done already, so it's seems silly to reinvent the wheel, but I can't
> find anything that isn't a simple linear crossfade (which is ok for
> crossfading, but not so good for panning).
> 
> Any tips/pointers appreciated.
> 
> Thanks,
> Tom
> 
> 
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