Learn · 13 lessons

    Stereo and phase

    Phase, polarity, stereo width and mid/side, with meters that show what your speakers can't.

    Lesson12 min

    What is polarity in audio?

    What polarity means in audio, what the Ø invert button does, when to flip a snare bottom mic or layered kick, and how it differs from phase, with a live lab.

    Lesson13 min

    What is comb filtering?

    Comb filtering explained for beginners: why a late copy of a sound cuts evenly spaced notches, how to work out where they land and how to fix it, with a live lab.

    Lesson13 min

    What is stereo width?

    Stereo width explained for beginners, with a live lab: widen and narrow real loops, read correlation and the goniometer, and hear exactly what mono takes away.

    Lesson13 min

    What is mid/side processing?

    Mid/side processing explained for beginners, with a live lab: hear the mid and side on their own, change the width, mono the bass and compress the centre.

    Lesson13 min

    What is mono compatibility?

    Mono compatibility explained for beginners, with a live lab: press Mono on a real mix, hear wideners, Haas delays and polarity flips cancel, and learn the fixes.

    Lesson12 min

    What is a pan law?

    Pan laws explained for beginners, with a live lab: switch between 0, −3, −4.5 and −6 dB, sweep a sound across the speakers and hear what each does in mono.

    Lesson12 min

    How to read a correlation meter

    Learn to read a correlation meter: what +1, 0 and −1 mean, how a reading predicts mono loss, what goniometer shapes show and what the needle misses.

    Lesson13 min

    How to phase align drums

    How to phase align multi-miked drums: flip the snare bottom mic, nudge the overheads to the snare and hear each fix on a four-mic kit in a free interactive lab.

    Comparison12 min

    Phase vs polarity

    Phase vs polarity explained: a flip turns a wave upside down at every frequency, while a delay shifts each one differently. Hear and measure both in a live lab.

    Comparison12 min

    Stereo widener vs mid/side

    Stereo widener vs mid/side, explained with a live lab: hear why side gain leaves mono untouched while delay and chorus wideners comb filter when summed.

    Comparison12 min

    Haas effect vs panning

    Panning moves a sound with level and the Haas effect moves it with time. Hear both in a stereo lab and see why only the Haas delay comb filters in mono.

    Comparison12 min

    Mono vs stereo

    Mono vs stereo audio explained: one channel against two, what a mono sum does to a stereo mix, and what to record, mix and export in each, with a live lab.

    Lesson14 min

    What is phase in audio?

    Phase in audio explained for beginners, with a live lab: flip polarity, delay one side, hear comb filtering and stereo width collapse when you press Mono.