pfft~ start-onset (4th argument)

    Jan 26 2011 | 3:43 pm
    to avoid a too large charge on the CPU when using multiple pfft~ i was told to change the offset of some, which is the 4th argument
    my I/O vector size is 512, signal vector size is 256
    the reference says "it must be a multiple of the current signal size and defaults to zero"
    _anything smaller than 256 is not accepted (error/warning in the max window)
    _512 is not accepted (offset should be less than hop size), neither is 1024 etc
    _ anything between 256 and 512 is not accepted
    hummm, what is the multiple of 256 which would be smaller than 512 ???
    or rather - what is the point I am not understanding??
    many thanks for some help