Klavis Quadigy

Download the firmware ZIP from the Klavis Quadigy product page and extract the WAV file. Connect an audio cable from your playback device to the Quadigy's CV A input. While holding the Preset and CV Matrix buttons simultaneously, power on your case — the display enters update mode. Play the WAV file at approximately two-thirds volume. A progress bar fills on screen; when complete, all green LEDs flash. Press any button to restart. If red LEDs appear, reduce playback volume and retry.