I think the low pass unit needs stereo floats, you're giving it a mono
buffer. Maybe that's the problem.

On Sat, Mar 21, 2015 at 3:52 PM, Patrick J. Collins <
[email protected]> wrote:

> > I don't think that you can call AudioUnitRender on the ioUnit, but I
> don't know
> > that for sure.  If you are going to do an offline render just leave it
> out and
> > call AudioUnitRender on the next unit up the chain.
>
> Unfortunately, that's still not working..  I changed it to:
>         AudioUnitRender(player.lowPassAU, &flag, &inTimeStamp, 0,
>         blockSize, bufferlist);
>
> My callback still isn't getting triggered, and that AudioUnitRender call
> is definitely being hit many times...
>
> Patrick J. Collins
> http://collinatorstudios.com
>
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