[LAD] Plugin 1/oct frequency controls (AMS/MCP/VCO)

David Robillard d at drobilla.net
Mon Aug 20 20:54:16 UTC 2012

On Mon, 2012-08-20 at 19:26 +0000, Fons Adriaensen wrote:
> On Mon, Aug 20, 2012 at 12:34:38PM -0400, David Robillard wrote:
> > So far I have done all of MCP and all of VCO.
> You'll find a call to exp2ap() with a complicated sum as
> the argument. One of the terms of that sum, usually near
> the end, is a constant. Adding 0.75f to that should
> transpose verything from middle C to A (440) - 3/4 octave
> up.

Makes sense.  Great, thanks.

> Also please check that all FP constants are single
> precision as well as all math.h functions. I was
> rather careless with that when I wrote those plugins.
> It matters, in particular if you compile for 32-bit
> SSE.

There is a GCC flag that warns about this (dubious float promotions), I
will run them through that.

Concerns about fragmentation?



-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 836 bytes
Desc: This is a digitally signed message part
URL: <http://lists.linuxaudio.org/pipermail/linux-audio-dev/attachments/20120820/e171fd69/attachment.pgp>

More information about the Linux-audio-dev mailing list