The generated WAV should be stereo, but if not, it doesn't matter. Here is how:įirst, load your generated WAV into Audacity. If not, you can use an editor program like Audacity to perform the inversion. If the TAP/TZX conversion program allows this inversion, use it. Then what? Just invert one of the channels so the voltage level of one channel, reffered to the other channel, will appear to be double the value of any of both channel reffered to ground (which won't be connected at all in our setup) So when you use it to load from a digital audio player, that will normally output the same level in both channels, you won't hear (or load) anything. Why do we need it to be stereo? The trick is that both channels from the 3.5'' stereo plug will make contact inside the Spectrum jack this way: If (and only if) your audio player is battery powered, and your Spectrum is the 48K or 128K toastrack model, try the following procedure, intended to boost the volume of your wave signal, as seen by the Spectrum EAR circuitry:
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