The Audio Version Of The Active Eurorack Crossfader Module Is Called Xfd. Product Details The XFD is a CV-controlled vactrol-based crossfader module, ideal for both audio and bipolar CV sources. It can be used as a cv-controlled attenuator: connecting just one input allows the signal to quickly fade in a VCA-like fashion. Works with video synths! Selecting the video version and we will send high-speed op amps in place of TL072 ICs. (If you purchase the audio version, you can change it to video down the road by swapping the ICs and soldering in a few ceramic caps.) Specifications: - Module width: 3HP - Module depth: 37mm - Current draw: +12V: 15mA, -12V: 15mA The XFD is a CV-controlled vactrol-based crossfader module. Ideal for both audio and bipolar CV sources. It can be used as a cv-controlled attenuator Connecting just one input allows the signal to quickly fade in a VCA-like fashion. The audio version can be change to video by swapping the ICs and soldering in a few ceramic caps. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.