if the notice of deposition stated an intention also to record the testimony by either of those methods, or if all the parties agree that the testimony may also be recorded by either of those methods
This verbiage implies that the definition of "agree" is something other than that which is formally stated. On a separate note, it could also be implied that only methods in addition to steno can be included in the notice.
certified
What does certified mean/
officer appointed or designated under Rule 28
What are the rules?
Copies of the Transcript or Recording. Unless the parties agree or the court orders otherwise, the officer must retain the record of a deposition according to the applicable records retention and disposition schedules adopted by the Supreme Court. Upon payment of a reasonable charge, the officer must provide a copy of the transcript or recording to any party or to the deponent.
and any party may inspect and copy them
Review by the Deponent; Changes.(1) Review; Statement of Changes. If requested by the deponent or a party before the deposition is completed, the deponent must be allowed 30 days after being notified by the officer that the transcript or recording is available in which:(A) to review the transcript or recording; and(B) if there are changes in form or substance, to sign and deliver to the officer a statement listing the changes and the reasons for making them.(2) Officer's Certificate to Attach Changes. The officer must note in the certificate prescribed by Rule 30(f)(1) whether a review was requested and, if so, must attach any changes the deponent made during the 30-day period.
Objections. The officer must note on the record any objection made during the deposition--whether to evidence, to a party's, deponent's, or counsel's conduct, to the officer's qualifications, to the manner of taking the deposition, or to any other aspect of the deposition
Certification and Delivery. The officer must certify in writing that the deponent was duly sworn by the officer and that the deposition accurately records the deponent's testimony. The certificate must accompany the record of the deposition. Unless the court orders otherwise, the officer must seal the deposition in an envelope or package bearing the title of the action and marked “Deposition of [witness's name]” and must promptly deliver it to the attorney who arranged for the transcript or recording. The attorney must store it under conditions that will protect it against loss, destruction, tampering, or deterioration.