Press the mid-shift button on your instrument or amplifier. This will middle change the range of frequencies you are boosting or lowering by about 500 kilohertz. For example, in one room, you may have to select the lower of the two frequencies to boost or reduce in order to receive a pleasing signal from your instrument. But in another room, this may sound displeasing and you may have to shift the equalizing of the middle signal to the higher of the two frequencies.
Mic an instrument that has no electric signal. To shift the middle frequencies that will be equalized, you must run the microphone through a computer and have audio editing software.
Open the software and create a new audio track for your instrument. This track should be created as "mono," and its input should match the input of the interface or other device that the computer is connected to.
Plug in an equalizer with multiple bands. You can drag, or shift, each band, including the highest and lowest bands, to any frequency you wish to edit. While this method takes much more time and effort, it gives you a greater amount of freedom to choose the exact way your instrument will sound. It also allows you to equalize microphoned instruments and instruments with electric signals.
Verify that your track is record-enabled if your audio-editing program requires that to transmit its signal to your output devices, such as speakers and sub-woofers.
Play your instrument and adjust the computer's equalization settings until you are pleased with what you hear. The most commonly shifted frequencies of many instruments are the middle and high-middle frequencies.