The effect of loudspeaker directivity on steady-state frequency response is well understood. However, the time domain behavior (spectral change during a transient) seems to be a somewhat less studied subject and therefore less clear what happens during a transient...

A simple and "fairly obvious" in-room speaker power response measurement without measuring off-axis responses with high spatial resolution.

HRTF analysis of different radiation patterns, focusing on the contribution of side reflections to the diffuse-field response.

Audibility thresholds for SINAD & THD+N measurements from auditory masking curves and hard clipped signal harmonics (pure-tone & two-tone).

A multitone measurement that combines the sensitivity of sine signal measurement with the all-revealing nature of multitone measurements.

Testing the limits of 44.1 kHz sampling rate with high-pass filtered audio samples and pure tones.

Sampling theory made simple. Demonstration of sampling, aliasing, oversampling.

By listening to the residual noise at different bit-depths, we can easily answer the question "how many bits are needed".

Extended version of Speaker Directivity Modeler with room response calculation from radiated sound power and free-field response (direct sound).

Online simulation of a speaker with a flat, completely rigid diaphragm mounted in an infinite baffle.

How does output impedance affect the frequency response? Some notes on damping factor.

Main topics: Calculation of the minimum cross-section. Shielded and twisted speaker cables. Speaker wire plugs. Table with recommended cable length. Calculation of the inductance loss.

Brief tutorial about audio interconnect cables.

Pre & post distortion filter measurements of a classic digital amp modeler.

Popular misconceptions about tube guitar amplifiers and tube distortion.