 Researcher David Shulman demonstrated in 1989 that this attestation was an error based on a later version of the recording; the 1909 recording does not use the word "jazz".Editors acknowledged the error, and the revised entry of "jazz" in OED Online changed the date of this quotation with a note about mistake.But many secondary sources continue to show 1909 as the earliest known example of the word based on the OED's original entry.