Rosendahl Studiotechnik is a German manufacturer of professional studio electronics based in Utting am Ammersee, Bavaria. Since 1999 the company has built a niche reputation in audio and video synchronization, producing master clocks and timing references aimed at post-production facilities, broadcast studios, and film-scoring rooms where sample-accurate sync between digital audio and picture is critical.

The brand is best known for the Nanosyncs line, a compact universal master clock and sync reference generator that combines a low-jitter audio clock with an integrated video black & burst sync generator, along with the Nanoclocks word clock distribution units that pair with it as a central timing hub for larger studios. Earlier products in the catalog include the mif4 MIDI/USB interface, and the Nanosyncs HD generation extended the platform with higher sample-rate support and DAW integration via MTC over USB.

Rosendahl is a small, specialist operation rather than a mass-market gear maker, and its products tend to show up in commercial recording and post studios that need a single rock-solid clock master rather than in typical project-studio rigs. The company is led by Martina Rosendahl as managing director.

Rosendahl has 2 products cataloged on Equipboard, including Effects Processors. Their gear is featured by 4 artists, with the strongest followings in Electronic, Rock, and Pop. Notable users include Paul McCartney, Armin Van Buuren, and Max Richter.