Click the “Logic” desktop icon or open the “Applications” folder and launch Logic from there.
Press on “File” and “New” to start a new session. If the guitar is already part of an existing Logic session, click “File” and “Open Recent. Select the relevant session from the drop-down menu. If importing a guitar recording into a new session, click “File,” “Import,” “Audio” and select the guitar recording from your browser. It will automatically open in its own audio channel.
Select “S” on the guitar audio channel to solo it. This mutes all other audio.
Click on the guitar audio channel to highlight it.
Press “Inerts” in the left-side channel strip. Click “Amps and Pedals” and select “Amp Designer.” This opens a virtual amplifier interface. Click the drop-down menu at the top to select an amplifier type. These preset amplifier types are based on real amplifiers, but have generic names, for example “Tweed.” Audition each by clicking and hitting “Play” on the navigation panel. Scroll down either with your mouse or with the down arrow on your Mac. These preset amp settings are fully customizable. You can adjust the tone, volume and gain parameters, and change the microphone position and microphone type to tweak the simulated amp tone to suit your preferences. This adds some authenticity to your guitar tone.
Select “Amps and Pedals” and “Pedalboard.” This opens a virtual pedal board on-screen. Drag the pedals from the menu onto the board to activate them, and tweak the settings. For example, to improve the distortion of the recorded guitar sound, drag the “Fuzz” pedal over and crank up the “Fuzz” setting.
Choose “Inserts,” “Dynamics” and “Compressor.” One typical flaw in digitally-recorded guitar sounds is dynamics. Often, you’ll experience volume spikes. A budget-price microphone fed into an audio interface connected to a computer will lack the dynamic smoothness you’d expect when recording onto a hardware mixing desk with a studio-quality mic. Compressors enable you to temper the dynamics of the sound by squashing the volume spikes. Tweak the “Threshold,” “Gain” and “Ratio” parameters to find a combination that suits your style.
Click “Inserts” and select “EQ.” This opens an equalizer interface. Equalizers enable you to enhance and reduce certain frequencies. If your recording is too tinny, for example, reduce the high frequencies by dragging down the slider dials on the right of the interface. This will cut out the high frequencies causing the tinny sound.