The June 2015 issue of Silicon Chip has an "infrasound snooper" project that allows you to hear sounds below 20Hz by frequency shifting.
Neither the article, the schematic, nor the parts list says whether the two pots used should be linear or logarithmic.
One pot controls the gain of the input signal. The other pot controls the output volume (to headphones).
Should we assume linear pots unless otherwise specified? Or should we assume logarithmic because audio is involved?
Neither the article, the schematic, nor the parts list says whether the two pots used should be linear or logarithmic.
One pot controls the gain of the input signal. The other pot controls the output volume (to headphones).
Should we assume linear pots unless otherwise specified? Or should we assume logarithmic because audio is involved?