# 5.5.1.6. eqcorrscan.utils.correlate.get_stream_xcorr

`eqcorrscan.utils.correlate.``get_stream_xcorr`(name_or_func=None, concurrency=None)

  Return a function for performing normalized cross correlation on lists of streams.

  Parameters: | name_or_func Either a name of a registered function or a callable that implements the standard array_normxcorr signature. concurrency Optional concurrency strategy, options are below.
  Returns: | A callable with the interface of stream_normxcorr
  Concurrency options:
  | multithread - use a threadpool for concurrency; multiprocess - use a process pool for concurrency; concurrent - use a customized concurrency strategy for the function, if not defined threading will be used.