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. Claude -- https://mathr.co.uk _______________________________________________ Pd-list@lists.iem.at mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list