If you're already using timbreID, you could put the list in a table and use [tabletool]'s "abs" method to do this without iterating.

On Feb 16, 2018 10:31 AM, "IOhannes m zmölnig" <zmoelnig@iem.at> wrote:
On 02/16/2018 02:43 PM, Peter P. wrote:
> Hi list,
>
> I am using William Brent's [cepstrum~] to calculate cepstral
> coefficients from a section of an audio signal. My object outputs 512
> the real-valued coefficients as pd message list, which I would like to
> convert to their absolute value. I can't seem to find an easy way to do
> this except for possibly sending the list to an array and using tabread

the [list] help has example implementations of a serializer and an
accumulator.

gfadsmf
IOhannes


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