Some think that Remote Fitting can be used take the place of this hardware prerequisite. For most (but not all) recently sold hearing aids, the device you will need is Noahlink Wireless. Hardware Prerequisite: In addition to obtaining free fitting software, you will also need to use a Hearing Aid Programming Device/hardware. The links within that PDF file may take you to directly a download site or, provide community share instructions for how to obtain hidden software. Just click the cloud storage link to-> DIY School - (v2.0) and read the download instructions in the first PDF file named (01 Free Hearing Aid Fitting Software). Software Prerequisite: Download the fitting software. The PDF files provide help with many self programming tasks, including the following two prerequisites. What is DIY School? It’s simply a collection of PDF files residing in cloud storage at this location DIY School - (v2.0) ← Click it to have a quick look at the PDF files inside DIY School.