Build minor, major, dominant, or composite blues scales in any key with note spelling, interval formula, blue-note focus, chord fit, and fretboard position output. Blues Scale Presets Preset use: Load ...

Estimate a used instrument's resale value from original value, brand tier, instrument family, condition, age, rarity, service history, market demand, documentation, originality, and selling channel.

Convert acoustic sound power level, Lw, into estimated sound pressure level, Lp, at a listener or measurement point using distance loss, directivity, boundary radiation, room support, and air ...

Check subwoofer impedance, RMS power match, amplifier stability, cable loss, current draw, and damping factor before pairing a sub with an amp. Count physical drivers connected to the amplifier ...

Air speed changes with temperature and humidity. Air temperature (C) Used only when the medium is air.

Size exponential horn flare from throat, mouth, length, temperature, and target cutoff.

Convert source pitch into frequency ratios, semitone moves, cents, and note names, or solve backward from a target Hz value. Enter either a transpose amount or a target frequency. The calculator will ...

Size speaker power, coverage, and speaker count for venues, then estimate the far-row SPL for speech, music, or live bands.

Design a notch filter for hum, buzz, resonant peaks, or feedback using twin-T, RLC, or DSP biquad math. For a 60 Hz twin-T notch, 10 k and about 0.265 uF are a common starting point. Base inductance ...

Size QRD, skyline, or binary diffuser panels, estimate depth and band limits, and plan how many modules you need for the target surface.

Tip: Keep the load at least ten times the source impedance when you can. That preserves voltage and keeps the sensitivity reading honest. Tip: Ribbons and low-output dynamics often need 50 dB or more ...

Estimate SPL drop from distance, air, path angle, and barrier loss for mics, monitors, live rooms, and stage sources. Use the same reference distance that was used to measure or estimate the source ...