For recording acoustic guitar, we used the H4n's built-in limiter on the recorder's stereo microphones, and the integrated general compression setting for the guitar's piezo mic output. The first recording features only the stereo microphone recording, which sounds clean and accurately reflects what was heard in the room. The second recording adds the sound captured from the direct piezo mic, which adds additional warmth and low end. The difference is especially noticeable with the chords played about halfway through the recording.
Acoustic guitar (stereo mics with limiter) Listen now: Acoustic guitar (stereo mics with limiter, direct piezo mic with compression, 3-channels) Listen now: