Hi Peter,
On 16/02/18 13:43, Peter P. wrote:
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 to serialize, calculate the absolute value for every element and send it back to another array, then requesting it as a list again. Has anyone got a better idea?
you could put it in a table of size 512, then trigger dsp in a switch~d off subpatch with blocksize 512:
"0, bang" | [switch~ 512]
[tabreceive~] | [abs~] | [tabsend~]
Order of execution means you can use the same table at both ends.
Then copy the table to a list ([array get] ? Not sure of the best way these days).
If the list were longer or not a power of two you could use [tabplay~] and [tabwrite~], with multiple bangs to the [switch~] if necessary.