Sound Tools & Calculators.

Pink Noise Generator

Equal energy per octave — the standard test signal for aligning and tuning a PA system.

Play noise Stop Idle

Level 20%

Low-pass 20 kHz

High-pass Off

Colour Pink White Brown

Result

Frequency & Wavelength

Convert between frequency and wavelength, and find the quarter-wave point — the basis of every delay and alignment decision.

Frequency (Hz)

Speed of sound (m/s)

Result

Inverse Square Law

How much level you lose when you move away from the source — the rule behind every SPL and coverage number.

Reference SPL (dB)

Reference distance (m)

New distance (m)

Result

Subwoofer Design & Spacing

Splay, end-fire and cardioid array spacing, coupling depth and the SPL you can expect in the audience area.

Array type Splay (splayed array) End-fire (stacked) Cardioid (end-fire cardioid)

Number of subs

Cabinet width (m)

Low frequency (Hz)

High frequency (Hz)

Target LF coupling (dB) 6 dB 12 dB 18 dB

SPL of one sub @ 1 m (dB)

Audience distance (m)

Manual spacing (m, optional)

Result

Alignment Delay Calculator

Distance to delay for aligning a sub, a fill or a delay line — in milliseconds and samples.

Distance (m)

Speed of sound (m/s)

Result

Power Converter

Amps ↔ kW, kW ↔ Amps, kVA ↔ kW and Amps ↔ kVA at 230 V — for amp racks, power planning and generators.

Conversion Amps → kW kW → Amps kVA → kW kW → kVA Amps → kVA kVA → Amps

Value

Power factor

Result

RF Link Budget

Path loss, received level and link margin for wireless mics and IEM — with the maximum usable distance.

TX power (dBm)

TX antenna gain (dBi)

RX antenna gain (dBi)

TX cable loss (dB)

RX cable loss (dB)

Frequency (MHz)

Distance (km)

RX sensitivity (dBm)

Fade margin (dB)

Result

dB Reference Converter

Move between dBu, dBV, dBFS and SPL — the units that cause the most confusion on a spec sheet.

Value

From dBu dBV dBFS dB SPL

To dBV dBu dBFS dB SPL

Result

Coverage Footprint

How wide a coverage angle really is on the floor — width, depth, area and rough seating.

Horizontal angle (°)

Vertical angle (°)

Distance (m)

Seats per m²

Result

Voltage Drop & Power

How much voltage a long power run actually loses — the number that kills a sound system on a big show.

Current (A)

Length, one way (m)

Cable gauge (AWG) 14 12 10 8 6 4 2 1 1/0

Supply voltage (V)

Result

RT60 & Room Acoustics

Reverberation time, mean free path and critical distance — how the room decides whether your system works.

Volume (m³)

Total surface (m²)

Average absorption

Result

Pan Law & Gain Structure

The −3 dB / −6 dB rules behind mono compatibility, pan law and why a mix suddenly loses level.

Scenario Mono source, both channels Stereo pair panned hard L / R Stereo, one speaker per side Summed down to mono

Extra attenuation (dB)

Result