Setting Sample Rate / Sync Source

1. Open PatchMix DSP Mixer.
2. Click the 'Session Settings' button in the toolbar.
3. Under the 'Clock Source' dropdown, select 'Internal' or an external source (S/PDIF, ADAT, Word Clock).
4. Set the desired 'Sample Rate' (e.g., 44.1kHz, 48kHz).
5. Click OK.

Source: 1820 — v2-1820-1212-en (manual)