They were all instructed in recording techniques before they left on their research trips. The arrangement was clear: They received a phonograph with the necessary equipment and a bulk of blank wax cylinders from the Archive. Upon their return, the equipment was given back, together with a so-called "journal” with all the necessary information about the recordings, such as place, date, informant and the recorded piece of music. The Archive was then responsible for reproducing galvanoplastic negatives (so-called galvanos) and a set of copies, one for the collector and one for the Archive. Hornbostel himself or other researchers transcribed the music and published the material.